hdu 1851 A Simple Game 简单博弈

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int maxn=1e5+5;
const int inf=0x3f3f3f3f;
const int mod=1e9+7;
int main()
{
    int t,n,m,p,q,f;
    scanf("%d",&t);
    while(t--&&scanf("%d",&n)!=EOF)
    {
        f=0;
        for(int i=0;i<n;i++)
        {
            scanf("%d%d",&p,&q);
            f^=p%(q+1);
        }
        if(!f)
            printf("Yes\n");
        else
            printf("No\n");
    }
    return 0;
}