#include <bits/stdc++.h>
#define fo(i, d, c) for (int i = d; i <= c; i++)
#define fod(i, c, d) for (int i = c; i >= d; i--)
#define maxn 1000010
#define N 5010
#define fi first
#define se second
#define pb emplace_back
#define en cout << "\n";
#define int long long
#define inf (int)1e18
#define bitcount(x) __builtin_popcountll(x)
#define pii pair<int, int>
#define vii vector<pii>
#define lb(x) x & -x
#define bit(i, j) ((i >> j) & 1)
#define offbit(i, j) (i ^ (1LL << j))
#define onbit(i, j) (i | (1LL << j))
#define vi vector<int>
#define all(x) x.begin(), x.end()
#define ss(x) (int)x.size()
using namespace std;
int n,m,q;
int 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) r[i][j] = 0,cnt[i + j]++;
const auto solve = [&](const int X, const int Y) -> int
{
if (r[X][Y] == 1)
{
return 1;
}
if (cnt[X + Y] == 1)
{
return 0;
}
std::stack<std::pair<int, int>> st;
const auto push = [&](const int x, const int y)
{
if (r[x][y] == 0)
{
r[x][y] = 1;
--cnt[x + y];
st.emplace(x, y);
}
};
push(X, Y);
while (!st.empty())
{
const int x = st.top().first;
const int y = st.top().second;
st.pop();
if (r[x - 1][y + 1] == 1)
{
push(x - 1, y);
push(x, y + 1);
}
if (r[x + 1][y - 1] == 1)
{
push(x, y - 1);
push(x + 1, y);
}
}
return 1;
};
fo(i,1,n) fo(j,1,m)
{
int x;
cin >> x;
if(x == 1) solve(i,j);
}
cin >> q;
while(q--)
{
int i,j;
cin >> i >> j;
cout << solve(i,j);
en;
}
}
Compilation message
furniture.cpp:25:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
25 | main()
| ^~~~
furniture.cpp: In function 'int main()':
furniture.cpp:30:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
30 | freopen(name".inp","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
furniture.cpp:31:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
31 | freopen(name".out","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
600 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
860 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
600 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
860 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
