This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define ll long long
#define sz size()
#define pb push_back
#define all(x) x.begin() , x.end()
using namespace std;
const int N = 2505 ;
int r , c , n ;
map<pair<int,int> , int > mp ;
bool bfs(int xx , int yy , int endx , int endy ){
queue<pair<int,int> > q ;
q.push({xx , yy}) ;
while (q.size())
{
auto &[x,y] = q.front() ;
q.pop() ;
if(x == endx && y == endy ) {return 1 ;}
if(mp[{x,y}]){
if(x+1 <= r ){
q.push({x+1 , y}) ;
}
}
else {
if(y+1 <= c ) {
q.push({x , y + 1 });
}
}
}
return 0 ;
}
int main()
{
cin >> r >> c >> n ;
for (int i = 0; i < n; i++)
{
int a, b ; cin >> a >> b;
mp[{a,b}]=1;
}
int t ; cin >> t;
for (int i = 0; i < t; i++)
{
int sx , sy , ex , ey ; cin >> sx >> sy >> ex >> ey;
bool ok = bfs(sx , sy,ex,ey) ;
if(ok)cout<<"Yes\n" ; else cout<<"No\n";
}
return 0;
}
/*
4 4 3
1 1
2 1
3 4
1
1 1 4 3
*
*
*
* */
Compilation message (stderr)
trampoline.cpp: In function 'bool bfs(int, int, int, int)':
trampoline.cpp:15:8: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
15 | auto &[x,y] = q.front() ;
| ^
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