#include<iostream>
#include<bits/stdc++.h>
using namespace std;



int main(){
    string s;
    cin>>s;
    int len = s.size();
    int m, c;

    if(s[2]=='-'){
        m = -(s[3]-'0');
    }
    else{
        m = (s[2]-'0');
    }
    if(len>5){
        c = s[len-1]-'0';
        if(s[len-2]=='-'){
            c = c * (-1);
        }
    }
    else{
        c = 0;
    }


    int q;
    cin>>q;
    while(q--){
        getchar();
        int x, y;
        cin>>x>>y;
        int res = (m*x + (c));
        if(res==y){
            cout<<"YES"<<endl;
        }
        else{
            cout<<"NO"<<endl;
        }
    }

    return 0;
}