結果
| 問題 | No.845 最長の切符 | 
| コンテスト | |
| ユーザー |  MarcusAureliusAntoninus | 
| 提出日時 | 2019-06-28 22:27:08 | 
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 65 ms / 3,000 ms | 
| コード長 | 919 bytes | 
| コンパイル時間 | 2,006 ms | 
| コンパイル使用メモリ | 199,460 KB | 
| 最終ジャッジ日時 | 2025-01-07 05:33:48 | 
| ジャッジサーバーID (参考情報) | judge4 / judge5 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 3 | 
| other | AC * 27 | 
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:15:31: warning: format ‘%lld’ expects argument of type ‘long long int*’, but argument 4 has type ‘int64_t*’ {aka ‘long int*’} [-Wformat=]
   15 |                 scanf("%d%d%lld", &a, &b, &c);
      |                            ~~~^           ~~
      |                               |           |
      |                               |           int64_t* {aka long int*}
      |                               long long int*
      |                            %ld
main.cpp:36:20: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘int64_t’ {aka ‘long int’} [-Wformat=]
   36 |         printf("%lld\n", max);
      |                 ~~~^     ~~~
      |                    |     |
      |                    |     int64_t {aka long int}
      |                    long long int
      |                 %ld
main.cpp:6:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    6 |         scanf("%d%d", &N, &M);
      |         ~~~~~^~~~~~~~~~~~~~~~
main.cpp:15:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   15 |                 scanf("%d%d%lld", &a, &b, &c);
      |                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
            
            ソースコード
#include <bits/stdc++.h>
int main()
{
	int N, M;
	scanf("%d%d", &N, &M);
	using vi = std::vector<int64_t>;
	using vvi = std::vector<vi>;
	vvi graph(N, vi(N));
	for (int i{}; i < M; i++)
	{
		int a, b;
		int64_t c;
		scanf("%d%d%lld", &a, &b, &c);
		a--; b--;
		graph[a][b] = std::max(graph[a][b], c);
		graph[b][a] = std::max(graph[b][a], c);
	}
	vvi dp(1 << N, vi(N, -1));
	for (int i{}; i < N; i++)
		dp[1 << i][i] = 0;
	int64_t max{};
	for (int set_i{1}; set_i < (1 << N); set_i++)
	{
		for (int now_i{}; now_i < N; now_i++)
		{
			max = std::max(max, dp[set_i][now_i]);
			if ((~set_i >> now_i & 1) || dp[set_i][now_i] < 0)
				continue;
			for (int next_i{}; next_i < N; next_i++)
				if ((~set_i >> next_i & 1) && graph[now_i][next_i] > 0)
					dp[set_i | (1 << next_i)][next_i] = std::max(dp[set_i | (1 << next_i)][next_i], dp[set_i][now_i] + graph[now_i][next_i]);
		}
	}
	printf("%lld\n", max);
	return 0;
}
            
            
            
        