p2

#include <iostream>

using namespace std;// ||

    int main () {

    int n,i,k,a,b,x,y;
    cout<<"n=";cin>>n;
    k=0;
    i=0;
    while (i<n)
    {
        cin>>a>>b;
        x=a;
        y=b;
        while (x!=y)
            if (x>y)
            x-=y;
        else
            y-=x;
        if (x==1)
            k++;

    i++;
    }
    cout<<"nr perechi= "<<k;
    return 0;
    }