結果
| 問題 | No.1284 Flip Game |
| コンテスト | |
| ユーザー |
siman
|
| 提出日時 | 2023-07-13 05:50:20 |
| 言語 | C++17(clang) (clang++ 22.1.2 + boost 1.89.0) |
| 結果 |
AC
|
| 実行時間 | 37 ms / 2,000 ms |
| コード長 | 1,729 bytes |
| 記録 | |
| コンパイル時間 | 5,068 ms |
| コンパイル使用メモリ | 149,628 KB |
| 実行使用メモリ | 40,448 KB |
| 最終ジャッジ日時 | 2026-04-04 14:04:22 |
| 合計ジャッジ時間 | 6,463 ms |
|
ジャッジサーバーID (参考情報) |
judge5_1 / judge3_0 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 28 |
コンパイルメッセージ
main.cpp:19:11: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
19 | ll C[N][N];
| ^
main.cpp:19:11: note: read of non-const variable 'N' is not allowed in a constant expression
main.cpp:17:7: note: declared here
17 | int N;
| ^
main.cpp:19:8: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
19 | ll C[N][N];
| ^
main.cpp:19:8: note: read of non-const variable 'N' is not allowed in a constant expression
main.cpp:17:7: note: declared here
17 | int N;
| ^
main.cpp:28:12: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
28 | ll dp[L][2 * N];
| ^~~~~
main.cpp:28:16: note: read of non-const variable 'N' is not allowed in a constant expression
28 | ll dp[L][2 * N];
| ^
main.cpp:17:7: note: declared here
17 | int N;
| ^
main.cpp:28:9: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
28 | ll dp[L][2 * N];
| ^
main.cpp:28:9: note: read of non-const variable 'L' is not allowed in a constant expression
main.cpp:27:7: note: declared here
27 | int L = (1 << (2 * N));
| ^
4 warnings generated.
ソースコード
#include <cassert>
#include <cmath>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <climits>
#include <map>
#include <queue>
#include <set>
#include <cstring>
#include <vector>
using namespace std;
typedef long long ll;
int main() {
int N;
cin >> N;
ll C[N][N];
for (int i = 0; i < N; ++i) {
for (int j = 0; j < N; ++j) {
cin >> C[i][j];
}
}
int L = (1 << (2 * N));
ll dp[L][2 * N];
memset(dp, -1, sizeof(dp));
for (int i = 0; i < N; ++i) {
int nmask = 1 << i;
dp[nmask][i] = 0;
}
for (int mask = 0; mask < L; ++mask) {
for (int i = 0; i < N; ++i) {
if (dp[mask][i] == -1) continue;
for (int j = 0; j < N; ++j) {
if (i == j) continue;
if (mask >> j & 1) continue;
int nmask = mask | (1 << j);
ll ncost = dp[mask][i] + C[i][j];
if (dp[nmask][j] == -1 || dp[nmask][j] > ncost) {
dp[nmask][j] = ncost;
}
}
for (int j = 0; j < N; ++j) {
if (i == j) continue;
if ((mask >> j & 1) == 0) continue;
if (mask >> (j + N) & 1) continue;
int nmask = mask | (1 << (j + N));
ll ncost = dp[mask][i] + C[i][j];
if (dp[nmask][j] == -1 || dp[nmask][j] > ncost) {
dp[nmask][j] = ncost;
}
}
}
}
ll ans = LLONG_MAX;
for (int mask = 0; mask < L; ++mask) {
int lmask = mask >> N;
if (__builtin_popcount(lmask) != N - 1) continue;
for (int i = 0; i < N; ++i) {
if (dp[mask][i] == -1) continue;
if (lmask >> i & 1) continue;
ans = min(ans, dp[mask][i]);
}
}
for (int i = 0; i < N; ++i) {
ans = min(ans, dp[L - 1][i]);
}
cout << ans << endl;
return 0;
}
siman