#include <stdio.h> int gcd(int a,int b) { if(a<b) return gcd(b,a); if(a%b==0) return b; else gcd(b,a%b); } int main(){ int a,b; if (scanf("%d/%d",&a,&b)!=EOF){ // 分析不敲钟的时间 int gcd_value = gcd(a,b); printf("%d/%d",a/gcd_value,b/gcd_value); } else{ printf("input wrong"); } return 0; }