Submission #165926

#	Time	Username	Problem	Language	Result	Execution time	Memory
165926		_qVp_	Kronican (COCI16_kronican)	C++14	100 / 100	956 ms	4600 KiB

kronican

#include <bits/stdc++.h>

using namespace std;

const int md = 2e7 + 10;
const int oo = 1e9 + 10;

int f[md];
int n, k, c[30][30];

int getbit(int x, int i) {
    return ((x >> i) & 1);
}

//1010011
//0010000

int offbit(int x, int i) {
    return ((1 << i) ^ x);
}

int main() {
//    freopen("test.in", "r", stdin);
    //freopen("test.out", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin >> n >> k;
    if (k >= n) {
        cout << "0";
        return 0;
    }
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= n; j++)
            cin >> c[i][j];
    }
    int res = oo;
    int ss = (1 << n) - 1;
    for(int i = 1; i <= ss; i++)
        f[i] = oo;
    f[ss] = 0;
    for(int s = ss; s >= 1; s--) {
        for(int i = 0; i < n; i++)
            if (getbit(s, i)) {
                int now = offbit(s, i);
                for(int j = 0; j < n; j++)
                    if (getbit(now, j))
                        f[now] = min(f[now], f[s] + c[i + 1][j + 1]);
            }
    }
    for(int i = 1; i <= ss; i++) {
        int cnt = 0;
        for(int j = 0; j < n; j++)
            cnt += getbit(i, j);
        if (cnt == k)
            res = min(res, f[i]);
    }
    cout << res;
    return 0;
}

• Subtask 1: 100 / 100