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P1631 序列合并(二叉堆)

IT影子 2022-04-08 阅读 49
算法

P1631 序列合并icon-default.png?t=M276https://www.luogu.com.cn/problem/P1631

#include <iostream>
#include <cstdio>
#include <string>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <cstring>
#include <set>
#include <cmath>
#include <map>
#include <cstdlib>
typedef long long ll;
typedef unsigned long long ull;
using namespace std;
const int MN = 65005;
const int MAXN = 2000010;
const int INF = 0x3f3f3f3f;
#define IOS ios::sync_with_stdio(false)

int n;
int a[MAXN];
int b[MAXN];
struct node {
	int x, y, z;
	node() {

	}
	node(int x1, int y1, int z1): x(x1), y(y1), z(z1) {

	}
	bool operator < (const node &b)const {
		return x > b.x;
	}
};

int main() {
	priority_queue<node, vector<node> > que;
	scanf("%d", &n);
	for (int i = 1; i <= n; i++) {
		scanf("%d", a + i);
	}
	for (int i = 1; i <= n; i++) {
		scanf("%d", b + i);
	}
	for (int i = 1; i <= n; i++) {
		que.push(node(a[i] + b[1], i, 1));
	}
	node t;
	for (int i = 1; i <= n; i++) {
		printf("%d ", que.top().x);
		t = que.top();
		que.pop();
		que.push(node(a[t.y] + b[t.z + 1], t.y, t.z + 1));
	}
	return 0;
}
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