Submission #871687

#TimeUsernameProblemLanguageResultExecution timeMemory
871687TAhmed33Gardening (RMI21_gardening)C++98
11 / 100
15 ms856 KiB
#include <bits/stdc++.h> using namespace std; /* const int n = 20; bool dp[n + 1][n + 1][n * n + 1]; int main () { for (int i = 2; i <= n; i += 2) { for (int j = 2; j <= n; j += 2) { for (int k = 1; k <= i * j; k++) { if (i == 2 && j == 2 && k == 1) { dp[i][j][k] = 1; continue; } dp[i][j][k] = dp[i - 2][j - 2][k - 1]; for (int l = 1; l < k; l++) { for (int s = 2; s < i; s += 2) { dp[i][j][k] |= dp[s][j][l] & dp[i - s][j][k - l]; } for (int s = 2; s < j; s += 2) { dp[i][j][k] |= dp[i][s][l] & dp[i][j - s][k - l]; } } } } } for (int i = 2; i <= n; i += 2) { for (int j = 2; j <= n; j += 2) { for (int l = 1; l <= i * j; l++) { if (dp[i][j][l]) { cout << "YES: " << i << " " << j << " " << l << '\n'; } else { cout << "NO: " << i << " " << j << " " << l << '\n'; } } } } n and m are even max(n / 2, m / 2) <= k <= n * m / 4, k != n * m / 4 - 1 if n == m then k != n / 2 - 1 pattern observation level el wa7sh }*/ vector <vector <int>> arr; int cnt = 0; bool valid (int n, int m, int k) { if (n <= 0 || m <= 0 || k <= 0) return 0; if (n & 1) return 0; if (m & 1) return 0; if (max(n / 2, m / 2) > k || k > n * m / 4 || k == n * m / 4 - 1 || (n == m && k == n / 2 - 1)) return 0; return 1; } void recurse (int x1, int y1, int x2, int y2, int k) { if (k == 0 || x1 > x2 || y1 > y2) return; int n = x2 - x1 + 1, m = y2 - y1 + 1; assert(valid(n, m, k)); if (k < n * m / 4 - (n + m) || valid(n - 2, m - 2, k - 1)) { cnt++; for (int i = x1; i <= x2; i++) arr[i][y1] = arr[i][y2] = cnt; for (int i = y1; i <= y2; i++) arr[x1][i] = arr[x2][i] = cnt; recurse(x1 + 1, y1 + 1, x2 - 1, y2 - 1, k - 1); return; } if (k == n * m / 4) { for (int i = x1; i < x2; i += 2) { for (int j = y1; j < y2; j += 2) { cnt++; arr[i][j] = arr[i][j + 1] = arr[i + 1][j] = arr[i + 1][j + 1] = cnt; } } return; } for (int l = 2; l < n; l += 2) { if (valid(l, m, (l * m / 4)) && valid(n - l, m, k - (l * m) / 4)) { recurse(x1, y1, x1 + l - 1, y2, (l * m) / 4); recurse(x1 + l, y1, x2, y2, k - l * m / 4); return; } } for (int l = 2; l < m; l += 2) { if (valid(n, l, (l * n / 4)) && valid(n, m - l, k - (l * n) / 4)) { recurse(x1, y1, x2, y1 + l - 1, (l * n) / 4); recurse(x1, y1 + l, x2, y2, k - l * n / 4); return; } } } int main () { ios::sync_with_stdio(0); cin.tie(0); int t; cin >> t; while (t--) { int n, m, k; cin >> n >> m >> k; if (!valid(n, m, k)) { cout << "NO\n"; continue; } cout << "YES\n"; arr.clear(); arr = vector <vector <int>> (n + 1, vector <int> (m + 1)); cnt = 0; recurse(1, 1, n, m, k); assert(k == cnt); for (int i = 1; i <= n; i++) { for (int j = 1; j <= m; j++) { cout << arr[i][j] << " "; } cout << '\n'; } cout << '\n'; } }
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