poj 2707 Copier Reduction

#include<iostream>#include<cstring>#include<cstdio>#include<queue>#include<cmath>using namespace std;int A,B,C,D;int main(){    int i,j,k;    while(scanf("%d%d%d%d",&A,&B,&C,&D), A||B||C||D){        double a = min((double)C/A,(double)D/B);        double b = min((double)C/B,(double)D/A);        double ans = max(a,b);        if(ans > 1) ans = 1;        printf("%d%%n",(int)(ans*100));    }    return 0;}