#include<bits/stdc++.h>
#define fo(i,l,r) for(int i = l ; i <= r ; i++)
#define fod(i,r,l) for(int i = r ; i >= l ; i--)
#define pb emplace_back
#define maxn 1000010
#define N 1010
#define int long long
#define ss(x) (int) x.size()
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define vii vector<pii>
#define en cout << "\n";
#define bit(x,i) ((x >> i) & 1)
#define bitcount(x) __builtint_popcount(x)
#define onbit(x,i) (x | (1ll << i))
#define offbit(x,i) (x ^ (1ll << i))
#define inf (int)1e18
#define lb(x) x & (-x)
using namespace std;
int n,m,q;
int a[N][N],r[N][N],cnt[maxn];
main()
{
#define name "TASK"
if(fopen(name".inp","r"))
{
freopen(name".inp","r",stdin);
freopen(name".out","w",stdout);
}
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n >> m;
fo(i,1,n) fo(j,1,m) cin >> a[i][j],r[i][j] = a[i][j];
fo(i,1,n) fo(j,1,m) if(!r[i][j] and i * j != 1 and i * j != n * m)
{
bool ok = 1;
if(i > 1 and !r[i - 1][j]) ok = 0;
if(j > 1 and !r[i][j - 1]) ok = 0;
r[i][j] = ok;
}
fod(i,n,1) fod(j,m,1) if(!r[i][j] and i * j != 1 and i * j != n * m)
{
bool ok = 1;
if(i < n and !r[i + 1][j]) ok = 0;
if(j < m and !r[i][j + 1]) ok = 0;
r[i][j] = ok;
}
fo(i,1,n) fo(j,1,m) if(!r[i][j]) cnt[i + j]++;
cin >> q;
while(q--)
{
int i,j;
cin >> i >> j;
if(r[i][j] == 1) cout << 1 << "\n";
else
{
if(cnt[i + j] > 1)
{
cout << 1 << "\n";
queue<pii> q;
q.push({i,j});
while(ss(q))
{
auto [x,y] = q.front();
r[x][y] = 1;
cnt[x + y]--;
q.pop();
if(r[x - 1][y + 1])
{
if(y < m)
q.push({x,y + 1});
if(x > 1)
q.push({x - 1,y});
}
if(r[x + 1][y - 1])
{
if(y > 1)
q.push({x,y - 1});
if(x < n)
q.push({x + 1,y});
}
}
}
else cout << 0 << "\n";
}
}
}
Compilation message
furniture.cpp:22:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
22 | main()
| ^~~~
furniture.cpp: In function 'int main()':
furniture.cpp:27:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
27 | freopen(name".inp","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
furniture.cpp:28:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
28 | freopen(name".out","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
717 ms |
524288 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
717 ms |
524288 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
