目录

• 诡异的因数
• 表单
• 分数的运算

诡异的因数

#include<bits/stdc++.h>
using namespace std;
void solve()
{
	int n; cin>>n;
	int cnt=0;
	for(int i=1;i<=n/i;i++)
	{
		if(n%i==0) 
		{
			cnt++;
			if(n/i!=i) cnt++;
		}
	}
	cout<<cnt<<endl;
}
int main(void)
{ 
	int t; cin>>t;
	while(t--)  solve();
	return 0;
}

表单

#include<bits/stdc++.h>
using namespace std;
const int N=1e5+10;
int n,m;
int a[N],cnt;
map<string,int>mp;
char s[100005];
int main(void)
{ 
	cin>>n>>m;
	for(int i=0;i<n;i++)
	{
		scanf("%s",s);
		if(mp[s]) cnt++;
		mp[s]++;
	}
	while(m--)
	{
		int op; scanf("%d",&op);
		if(op==1)
		{
			scanf("%s",s);
			if(mp[s]) cnt++;
			mp[s]++;
		}else
		{
			cout<<cnt<<endl;
			cnt=0;
		}
	}
	return 0;
}

分数的运算

#include<bits/stdc++.h> 
using namespace std;
typedef long long int LL;
LL xx1,yy1,xx2,yy2;
LL gcd(LL a,LL b) {return b?gcd(b,a%b):a;}
void f1()
{
	LL a=xx1*yy2+xx2*yy1;
	LL b=yy1*yy2;
	int flag=1;
	if(a<0) flag=flag*(-1);
	if(b<0) flag=flag*(-1);
	a=labs(a),b=labs(b);
	LL temp=gcd(a,b);
	if(a==0||b==0)
	{
		printf("0 0\n");
	}
	else printf("%lld %lld\n",flag*a/temp,b/temp);
}
void f2() 
{
	LL a=xx1*yy2-xx2*yy1;
	LL b=yy1*yy2;
	int flag=1;
	if(a<0) flag=flag*(-1);
	if(b<0) flag=flag*(-1);
	a=labs(a),b=labs(b);
	LL temp=gcd(a,b);
	if(a==0||b==0)
	{
		printf("0 0\n");
	}
	else printf("%lld %lld\n",flag*a/temp,b/temp);
}
void f3()
{
	LL a=xx1*xx2;
	LL b=yy1*yy2;
	int flag=1;
	if(a<0) flag=flag*(-1);
	if(b<0) flag=flag*(-1);
	a=labs(a),b=labs(b);
	LL temp=gcd(a,b);
	if(a==0||b==0)
	{
		printf("0 0\n");
	}
	else printf("%lld %lld\n",flag*a/temp,b/temp);
}
void f4()
{
	LL a=xx1*yy2;
	LL b=yy1*xx2;
	int flag=1;
	if(a<0) flag=flag*(-1);
	if(b<0) flag=flag*(-1);
	a=labs(a),b=labs(b);
	LL temp=gcd(a,b);
	if(a==0||b==0)
	{
		printf("0 0\n");
	}
	else printf("%lld %lld\n",flag*a/temp,b/temp);
}
int main(void)
{
	cin>>xx1>>yy1>>xx2>>yy2;
	f1(),f2(),f3(),f4();
	return 0;
}