#include<stdio.h> #include<math.h> int gcd(int a,int b){ if(b==0) return a; return gcd(b,a%b); } int main() { int a,b,c,d; char o; while(scanf("%d/%d%c%d/%d",&a,&b,&o,&c,&d)!=EOF){ a*=d; c*=b; int zi,mu; mu=b*d; if(o=='+') zi=a+c; else zi=a-c; int temp=gcd(abs(zi),mu); if(zi==0) printf("0\n"); else printf("%d/%d\n",zi/temp,mu/temp); } return 0; } |
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