Submission #831167

#	Time	Username	Problem	Language	Result	Execution time	Memory
831167		gustavo_d	Kronican (COCI16_kronican)	C++17	100 / 100	653 ms	4436 KiB

kronican

// https://oj.uz/problem/view/COCI16_kronican > p90
#include <bits/stdc++.h>
using namespace std;

const int maxn = 20;
int c[maxn][maxn];

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);

    int n, k; cin >> n >> k;
    for (int i=0; i<n; i++) {
        for (int j=0; j<n; j++) {
            cin >> c[i][j];
        }
    }
    vector<int> dp((1<<n), 1e9);
    int mn = 1e9;
    for (int m=0; m<(1 << n); m++) {
        int mask = m;
        int qtd = 0; // active bits
        while ((mask & -mask) != 0) {
            qtd++;
            mask -= (mask & -mask);
        }
        mask = m;
        if (qtd <= k) {
            dp[mask] = 0;
        }
        else {
            for (int i=0; i<n; i++) {
                if (((1 << i) & mask) != 0) { // ativo (veremos antes dele)
                    for (int j=0; j<n; j++) {
                        if (i != j and ((mask & (1 << j)) != 0)) { // o que receberá água precisa estar ativo
                            dp[mask] = min(dp[mask], dp[mask ^ (1 << i)] + c[i][j]);
                        }
                    }
                }
            }
        }
    }
    cout << dp[(1<<n) - 1] << endl;

    return 0;
}

Compilation message (stderr)

kronican.cpp: In function 'int main()':
kronican.cpp:18:9: warning: unused variable 'mn' [-Wunused-variable]
   18 |     int mn = 1e9;
      |         ^~

• Subtask 1: 100 / 100