/* made by amunduzbaev */
//~ #include <ext/pb_ds/assoc_container.hpp>
//~ #include <ext/pb_ds/tree_policy.hpp>
#include "bits/stdc++.h"
using namespace std;
//~ using namespace __gnu_pbds;
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vv vector
#define mem(arr, v) memset(arr, v, sizeof arr)
#define int long long
#define degub(x) cout<<#x<<" : "<<x<<"\n"
#define GG cout<<"here\n";
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef vector<int> vii;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) { return a > b ? a = b, true : false; }
template<class T> bool umax(T& a, const T& b) { return a < b ? a = b, true : false; }
template<int sz> using tut = array<int, sz>;
void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
//~ template<class T> using oset = tree<T,
//~ null_type, less_equal<T>, rb_tree_tag,
//~ tree_order_statistics_node_update> ordered_set;
const int N = 1e3+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
#define MULTI 0
int n, m, k, s, t, q, ans, res, a[N][N];
int ch[2][2] = {{-1, 1}, {1, -1}};
int cnt[N+N];
void solve(int t_case){
cin>>n>>m;
for(int i=0;i<=n+1;i++) for(int j=0;j<=m+1;j++) a[i][j] = 1;
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++) cin>>a[i][j], cnt[i+j] += !a[i][j];
queue<pii> qq;
//~ auto check = [&](int i, int j){ return (i >= 1 && i <= n && j >= 1 && j <= m); };
auto bfs = [&](){
while(!qq.empty()){
pii u = qq.front(); qq.pop();
for(int i=0;i<2;i++){
pii tt = u; tt.ff += ch[i][0], tt.ss += ch[i][1];
if(a[tt.ff][tt.ss]){
if(umax(a[tt.ff][u.ss], 1ll)) cnt[tt.ff+u.ss]--, qq.push({tt.ff, u.ss});
if(umax(a[u.ff][tt.ss], 1ll)) cnt[u.ff+tt.ss]--, qq.push({u.ff, tt.ss});
}
}
}
};
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
if(a[i][j]) qq.push({i, j});
}
} bfs();
//~ for(int i=1;i<=n;i++) { for(int j=1;j<=m;j++) cout<<a[i][j]<<" "; cout<<"\n"; }
cin>>q;
while(q--){
int i, j; cin>>i>>j;
if(a[i][j]) { cout<<1<<"\n"; continue; }
if(cnt[i+j] == 1) { cout<<0<<"\n"; continue; }
cnt[i+j]--, a[i][j] = 1, qq.push({i, j}); bfs();
cout<<1<<"\n";
}
}
signed main(){
NeedForSpeed
if(MULTI){
int t; cin>>t;
for(int t_case = 1; t_case <= t; t_case++) solve(t_case);
} else solve(1);
return 0;
}
Compilation message
furniture.cpp: In function 'void usaco(std::string)':
furniture.cpp:34:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
34 | void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
furniture.cpp:35:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
35 | freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
588 KB |
Output is correct |
| 2 |
Correct |
2 ms |
716 KB |
Output is correct |
| 3 |
Correct |
3 ms |
716 KB |
Output is correct |
| 4 |
Correct |
4 ms |
844 KB |
Output is correct |
| 5 |
Correct |
4 ms |
844 KB |
Output is correct |
| 6 |
Correct |
4 ms |
844 KB |
Output is correct |
| 7 |
Correct |
4 ms |
844 KB |
Output is correct |
| 8 |
Correct |
4 ms |
844 KB |
Output is correct |
| 9 |
Correct |
4 ms |
844 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
588 KB |
Output is correct |
| 2 |
Correct |
2 ms |
716 KB |
Output is correct |
| 3 |
Correct |
3 ms |
716 KB |
Output is correct |
| 4 |
Correct |
4 ms |
844 KB |
Output is correct |
| 5 |
Correct |
4 ms |
844 KB |
Output is correct |
| 6 |
Correct |
4 ms |
844 KB |
Output is correct |
| 7 |
Correct |
4 ms |
844 KB |
Output is correct |
| 8 |
Correct |
4 ms |
844 KB |
Output is correct |
| 9 |
Correct |
4 ms |
844 KB |
Output is correct |
| 10 |
Correct |
13 ms |
1228 KB |
Output is correct |
| 11 |
Correct |
3 ms |
588 KB |
Output is correct |
| 12 |
Correct |
205 ms |
13156 KB |
Output is correct |
| 13 |
Correct |
84 ms |
11460 KB |
Output is correct |
| 14 |
Correct |
409 ms |
16640 KB |
Output is correct |
| 15 |
Correct |
369 ms |
15812 KB |
Output is correct |
| 16 |
Correct |
407 ms |
16160 KB |
Output is correct |
| 17 |
Correct |
423 ms |
16452 KB |
Output is correct |
| 18 |
Correct |
384 ms |
16356 KB |
Output is correct |
| 19 |
Correct |
493 ms |
16572 KB |
Output is correct |
| 20 |
Correct |
368 ms |
16580 KB |
Output is correct |
| 21 |
Correct |
453 ms |
16684 KB |
Output is correct |
