#includeunsigned gcd ( unsigned m,unsigned n );void sum( unsigned *sum_x,unsigned *sum_y,unsigned x, unsigned y);int main(){
int n,i;
unsigned sum_x, sum_y,x,y;
scanf("%d",&n);
scanf("%u/%u",&sum_x, &sum_y);
for(i=1;i<n;++i) {
scanf("%u/%u",&x, &y);
sum(&sum_x, &sum_y, x, y);
}
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