0
点赞
收藏
分享

微信扫一扫

Android 设计模式单例

源码之路 03-17 10:30 阅读 3

1238. 日志统计 - AcWing题库 

import java.util.*;

class PII implements Comparable<PII>{
    int x, y;
    public PII(int x, int y){
        this.x = x;
        this.y = y;
    }
    public int compareTo(PII o){
        return Integer.compare(x, o.x);
    }
}

public class Main{
    static int N = 100010, D, K;
    static int[] cnt = new int[N];
    static PII[] a = new PII[N];
    static boolean[] st = new boolean[N];

    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        D = sc.nextInt();
        K = sc.nextInt();

        for(int i = 0; i < n; i ++){
            int ts = sc.nextInt();
            int id = sc.nextInt();
            a[i] = new PII(ts, id);
        }

        Arrays.sort(a, 0, n);

        for(int i = 0, j = 0; i < n; i ++){//i比j快
            int id = a[i].y;
            cnt[id] ++;
            while(a[i].x - a[j].x >= D){
                cnt[a[j].y] --;
                j ++;
            }

            if(cnt[id] >= K) st[id] = true;
        }

        for(int i = 0; i <= 100000; i ++){
            if(st[i]) System.out.println(i);
        }
    }
}

1101. 献给阿尔吉侬的花束 - AcWing题库 

import java.util.*;

class PII{
    int x, y;
    public PII(int x, int y){
        this.x = x;
        this.y = y;
    }
}

public class Main{
    static int N = 210;
    static int r, c;
    static char[][] g = new char[N][N];
    static int[][] dist = new int[N][N];
    static int[] dx = {-1, 0, 1, 0};
    static int[] dy = {0, 1, 0, -1};
    static PII start, end;
    
    public static int bfs(PII start, PII end){
        Queue<PII> q = new LinkedList<>();
        for(int i = 0; i < r; i ++){
            Arrays.fill(dist[i], -1);
        }
        
        q.offer(start);
        dist[start.x][start.y] = 0;
        
        while(!q.isEmpty()){
            PII t = q.poll();
            
            for(int i = 0; i < 4; i ++){
                int x = t.x + dx[i];
                int y = t.y + dy[i];
                if(x < 0 || x >= r || y < 0 || y >= c) continue;
                if(g[x][y] == '#') continue;
                if(dist[x][y] != -1) continue;
                
                dist[x][y] = dist[t.x][t.y] + 1;
                if(end.x == x && end.y == y) return dist[x][y];
                q.offer(new PII(x, y));
            }
        }
        return -1;
    }
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int T = sc.nextInt();
        while(T -- > 0){
            r = sc.nextInt();
            c = sc.nextInt();
            
            for(int i = 0; i < r; i ++){
                char[] s = sc.next().toCharArray();
                for(int j = 0; j < c; j ++){
                    g[i][j] = s[j];
                    if(g[i][j] == 'S') start = new PII(i, j);
                    if(g[i][j] == 'E') end = new PII(i, j);
                }
            }
            
            int res = bfs(start, end);
            if(res == -1) System.out.println("oop!");
            else System.out.println(res);
        }
    }
}

1113. 红与黑 - AcWing题库 

import java.util.*;

public class Main{
    static int N = 25;
    static int[] dx = {-1, 0, 1, 0}, dy = {0, 1, 0, -1};
    static int n, m, res;
    static char[][] g = new char[N][N];
    static boolean[][] st = new boolean[N][N];
    
    public static void dfs(int x, int y){
        res ++;
        st[x][y] = true;
        
        for(int i = 0; i < 4; i ++){
            int a = x + dx[i];
            int b = y + dy[i];
            if(a < 0 || b < 0 || a >= n || b >= m) continue;
            if(st[a][b]) continue;
            if(g[a][b] == '#') continue;
            
            dfs(a, b);
        }
    }
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(true){
            m = sc.nextInt();
            n = sc.nextInt();//这里是先行后列
            if(n == 0 && m == 0) break;
            
            res = 0;
            int x = -1, y = -1;
            for(int i = 0; i < n; i ++){
                String s = sc.next();
                for(int j = 0; j < m; j ++){
                    g[i][j] = s.charAt(j);
                    st[i][j] = false;
                    if(g[i][j] == '@'){
                        x = i;
                        y = j;
                    }
                }
            }
            
            dfs(x, y);
            System.out.println(res);
        }
    }
}

1224. 交换瓶子 - AcWing题库

import java.util.*;

public class Main{
    static int N = 10010;
    static int[] a = new int[N];
    static boolean[] st = new boolean[N];
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for(int i = 1; i <= n; i ++){
            a[i] = sc.nextInt();
        }
        
        int res = 0;
        for(int i = 1; i <= n; i ++){
            if(!st[i]){
                res ++;
                for(int j = i; !st[j]; j = a[j]){
                    st[j] = true;
                }
            }
        }
        
        System.out.print(n - res);
    }
}

 

1240. 完全二叉树的权值 - AcWing题库

import java.util.*;

public class Main{
    static int N = 100010;
    static int[] w = new int[N];
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for(int i = 1; i <= n; i ++) w[i] = sc.nextInt();
        
        int depth = 0;
        long max = -0x3f3f3f3f;
        for(int i = 1, k = 1; i <= n; i *= 2, k ++){
            long sum = 0;
            for(int j = i; j < i + (1 << (k - 1)) && j <= n; j ++){
                sum += w[j];
            }
            
            if(sum > max){
                max = sum;
                depth = k;
            }
        }
        
        System.out.print(depth);
    }
}

 

1096. 地牢大师 - AcWing题库

import java.util.*;

class PII{
    int x, y, z;
    public PII(int x, int y, int z){
        this.x = x;
        this.y = y;
        this.z = z;
    }
}

public class Main{
    static int N = 110;
    static int L, R, C;
    static char[][][] g = new char[N][N][N];
    static int[][][] dist = new int[N][N][N];
    static boolean[][][] st = new boolean[N][N][N];
    static PII start, end;
    static int[] dx = {0, 0, -1, 0, 1, 0}, dy = {0, 0, 0, 1, 0, -1}, dz = {-1, 1, 0, 0, 0, 0};
    
    public static int bfs(){
        for(int i = 0; i < L; i ++){
            for(int j = 0; j < R; j ++){
                Arrays.fill(dist[i][j], -1);
            }
        }
        
        Queue<PII> q = new LinkedList<>();
        q.offer(start);
        dist[start.x][start.y][start.z] = 0;
        
        while(!q.isEmpty()){
            PII t = q.poll();
            for(int i = 0; i < 6; i ++){
                int a = t.x + dx[i];
                int b = t.y + dy[i];
                int c = t.z + dz[i];
                if(a < 0 || b < 0 || c < 0 || a >= L || b >= R || c >= C) continue;
                if(dist[a][b][c] != -1) continue;
                if(g[a][b][c] == '#') continue;
                
                dist[a][b][c] = dist[t.x][t.y][t.z] + 1;
                if(a == end.x && b == end.y && c == end.z) return dist[a][b][c];
                
                q.offer(new PII(a, b, c));
            }
        }
        return -1;
    }
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(true){
            L = sc.nextInt();
            R = sc.nextInt();
            C = sc.nextInt();
            if(L == 0 && R == 0 && C == 0) break;
            
            for(int i = 0; i < L; i ++){
                for(int j = 0; j < R; j ++){
                    String s = sc.next();
                    for(int k = 0; k < C; k ++){
                        g[i][j][k] = s.charAt(k);
                        if(g[i][j][k] == 'S') start = new PII(i, j, k);
                        if(g[i][j][k] == 'E') end = new PII(i, j, k);
                    }
                }
            }
            
            int res = bfs();
            if(res == -1) System.out.println("Trapped!");
            else System.out.printf("Escaped in %d minute(s).\n", res);
        }
    }
}

1233. 全球变暖 - AcWing题库

import java.util.*;

class PII{
    int x, y;
    public PII(int x, int y){
        this.x = x;
        this.y = y;
    }
}

public class Main{
    static int N = 1010;
    static int n;
    static char[][] g = new char[N][N];
    static boolean[][] st = new boolean[N][N];
    static int[] dx = {-1, 0, 1, 0}, dy = {0, 1, 0, -1};
    
    public static boolean bfs(int x, int y){
        Queue<PII> q = new LinkedList<>();
        q.offer(new PII(x, y));
        st[x][y] = true;
        
        int max = 0;
        while(!q.isEmpty()){
            PII t = q.poll();
            int cnt = 0;//记录周围#的个数
            for(int i = 0; i < 4; i ++){
                int a = t.x + dx[i];
                int b = t.y + dy[i];
                if(a < 0 || b < 0 || a >= n || b >= n) continue;
                if(g[a][b] == '.') continue;
                
                cnt ++;
                if(!st[a][b]){
                    st[a][b] = true;
                    q.offer(new PII(a, b));
                }
            }
            max = Math.max(max, cnt);
        }
        
        if(max == 4) return true;
        else return false;
    }
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        n = sc.nextInt();
        
        for(int i = 0; i < n; i ++){
            String s = sc.next();
            for(int j = 0; j < n; j ++){
                g[i][j] = s.charAt(j);
            }
        }
        
        int res = 0;
        for(int i = 0; i < n; i ++){
            for(int j = 0; j < n; j ++){
                if(!st[i][j] && g[i][j] == '#'){
                    if(!bfs(i, j)) res ++;
                }
            }
        }
        System.out.print(res);
    }
}

 1207. 大臣的旅费 - AcWing题库

import java.util.*;

public class Main{
    static int N = 100010, M = 2 * N;
    static int[] h = new int[N], e = new int[M], ne = new int[M], w = new int[M];
    static int[] dist = new int[N];
    static boolean[] st = new boolean[N];
    static int n, idx;
    
    public static void add(int a, int b, int c){
        e[idx] = b;
        w[idx] = c;
        ne[idx] = h[a];
        h[a] = idx ++;
    }
    
    public static void bfs(int u){
        Arrays.fill(st, false);
        Queue<Integer> q = new LinkedList<>();
        dist[u] = 0;
        q.offer(u);
        st[u] = true;
        
        while(!q.isEmpty()){
            int t = q.poll();
            for(int i = h[t]; i != -1; i = ne[i]){
                int j = e[i];
                if(st[j]) continue;
                dist[j] = dist[t] + w[i];
                st[j] = true;
                q.offer(j);
            }
        }
    }
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        n = sc.nextInt();
        
        Arrays.fill(h, -1);
        for(int i = 1; i < n; i ++){
            int a = sc.nextInt();
            int b = sc.nextInt();
            int c = sc.nextInt();
            add(a, b, c);
            add(b, a, c);
        }
        
        bfs(1);
        int u = 1;
        for(int i = 2; i <= n; i ++){
            if(dist[i] > dist[u]) u = i;
        }
        
        bfs(u);
        int maxv = dist[1];
        for(int i = 2; i <= n; i ++){
            if(dist[i] > maxv) maxv = dist[i];
        }

        System.out.println(maxv * 10 + ((long)(maxv + 1) * maxv) / 2);
    }
}
举报

相关推荐

0 条评论