CF 337B(Routine Problem-公式题)
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公式题,别手残就行。。
#include<cstdio>#include<cstring>#include<cstdlib>#include<algorithm>#include<functional>#include<iostream>#include<cmath>#include<cctype>#include<ctime>using namespace std;#define For(i,n) for(int i=1;i<=n;i++)#define Fork(i,k,n) for(int i=k;i<=n;i++)#define Rep(i,n) for(int i=0;i<n;i++)#define ForD(i,n) for(int i=n;i;i--)#define RepD(i,n) for(int i=n;i>=0;i--)#define Forp(x) for(int p=pre[x];p;p=next[p])#define Lson (x<<1)#define Rson ((x<<1)+1)#define MEM(a) memset(a,0,sizeof(a));#define MEMI(a) memset(a,127,sizeof(a));#define MEMi(a) memset(a,128,sizeof(a));#define INF (2139062143)#define F (100000007)long long mul(long long a,long long b){return (a*b)%F;}long long add(long long a,long long b){return (a+b)%F;}long long sub(long long a,long long b){return (a-b+(a-b)/F*F+F)%F;}typedef long long ll;int gcd(int a,int b){if (b==0) return a;return gcd(b,a%b);}int mib(int &a,int &b){int g=gcd(a,b);a/=g,b/=g;}int a,b,c,d;int main(){//freopen(".in","r",stdin);//freopen(".out","w",stdout);cin>>a>>b>>c>>d;mib(a,b),mib(c,d);if ((double)a/b>(double)c/d) swap(a,b),swap(c,d);int p=a*d,q=c*b;mib(p,q);cout<<q-p<<'/'<<q<<endl;return 0;}
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