题解 | #化简分数#
化简分数
https://ac.nowcoder.com/acm/problem/14409
思路
化简就是求一个gcd。
代码
#include<bits/stdc++.h>
#define inf 0x3f3f3f3f
#define int long long
using namespace std;
const int N=2e5+7;
const int mod=1e9+7;
//int read(){ int x=0,f=1;char ch=getchar();while(ch<'0'||ch>'9'){if(ch=='-') f=f*-1;ch=getchar();}while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}return x*f;}
int gcd(int a,int b){
return b?gcd(b,a%b):a;
}
int t,a,b,c,d;
signed main(){
cin>>t;
while(t--){
cin>>a>>b>>c>>d;
int fm=b*d,fz=a*d+c*b,g=gcd(fm,fz);
fm/=g;fz/=g;
cout<<fz<<" "<<fm<<"\n";
}
return 0;
}