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>
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;} // greatest common divisor (PGCD)
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);} // least common multiple (PPCM)
#define ss second
#define ff first
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define vi vector<int>
#define vii vector<pair<int,int>>
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd pair<double,double>
#define vdd vector<pdd>
#define dte tuple<double , double , double>
using namespace std;
const int INF = 1000*1000*1000; // 1 e 9
const int MOD = 1e9 + 7;//998244353 ;
const double EPS = 0.000000001; // 1 e -9
const ll inf = (ll)1e18;
int n , m , q;
int g[1010][1010];
bool vis[1010][1010];
void dfs(int x , int y){
if( x == n + 1 || y == m + 1 || vis[x][y] || g[x][y]) return ;
vis[x][y] = true;
dfs(x + 1 , y); dfs(x , y + 1);
}
int main(){
//ifstream fin ("testing.txt");
//ofstream fout ("output.txt");
ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
cin>>n>>m;
for(int i = 1 ; i <= n ; i++){
for(int j = 1 ; j <=m ; j++) cin>>g[i][j];
}
cin>>q;
while(q--){
int x , y ; cin>>x>>y;
g[x][y] = 1;
for(int i = 1 ; i <= n ; i++) for(int j = 1 ; j <= m ; j++) vis[i][j] = false;
dfs(1 , 1);
cout << vis[n][m] << "\n";
if(!vis[n][m]) g[x][y] = 0;
}
return 0;
}
/*
Think of : BS / DFS / BFS / SSSP / SCC / MSP / MAX FLOW / TOPSORT / LCA / MATRIX / DP(bitmask) / 2 POINTERS / SEG TREE / MATH / UN FIND / MO / HLD
Read the statement CAREFULLY !!
Make a GREADY APPROACH !!!! (start from highest / lowest)
Make your own TESTS !!
Be careful from CORNER CASES !
*/
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