Submission #525557

#	Time	Username	Problem	Language	Result	Execution time	Memory
525557		mjhmjh1104	Mountains and Valleys (CCO20_day1problem3)	C++17	3 / 25	397 ms	82508 KiB

Main

#include <cstdio>
#include <vector>
#include <utility>
#include <algorithm>
using namespace std;

int n, m, dp[20][20971520];
vector<pair<int, int>> adj[20];

int f(int x, int y) {
    if (dp[x][y] + 1) return dp[x][y];
    if (!y) return dp[x][y] = 0;
    dp[x][y] = (int)1e9;
    for (auto &i: adj[x]) dp[x][y] = min(dp[x][y], i.second + f(i.first, y & ~(1 << i.first)));
    return dp[x][y];
}

int main() {
    scanf("%d%d", &n, &m);
    for (int i = 0; i < n; i++) for (int j = 0; j < 1 << n; j++) dp[i][j] = -1;
    while (m--) {
        int x, y, w;
        scanf("%d%d%d", &x, &y, &w);
        adj[x].push_back({ y, w });
        adj[y].push_back({ x, w });
    }
    int res = (int)1e9;
    for (int i = 0; i < n; i++) res = min(res, f(i, (1 << n) - 1 ^ 1 << i));
    printf("%d", res);
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:28:62: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   28 |     for (int i = 0; i < n; i++) res = min(res, f(i, (1 << n) - 1 ^ 1 << i));
      |                                                     ~~~~~~~~~^~~
Main.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
Main.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         scanf("%d%d%d", &x, &y, &w);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 1 / 1
• Subtask 2: 2 / 2
• Subtask 3: 0 / 2
• Subtask 4: 0 / 6
• Subtask 5: 0 / 2
• Subtask 6: 0 / 3
• Subtask 7: 0 / 5
• Subtask 8: 0 / 4