Submission #1226703

#	Time	Username	Problem	Language	Result	Execution time	Memory
1226703		nanaseyuzuki	Kronican (COCI16_kronican)	C++20	100 / 100	305 ms	4544 KiB

kronican

#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pii pair<int, int>
const int mn = 21, inf = 1e18;

int n, k, a[mn][mn];
int dp[(1 << 20) + 1];

void solve(){
    cin >> n >> k;
    for(int i = 0; i < n; i++){
        for(int j = 0; j < n; j++){
            cin >> a[i][j];
        }
    }
    fill(&dp[0], &dp[0] + ((1 << 20) + 1), inf);
    dp[(1 << n) - 1] = 0;
    int res = INT_MAX;
    for(int mask = (1 << n) - 1; mask >= 0; mask --){
        vector <int> cand;
        for(int i = 0; i < n; i++){
            if(mask & (1 << i)) cand.push_back(i);
        }
        for(auto i : cand){
            int new_mask = mask ^ (1 << i);
            for(auto j : cand){
                if(i == j) continue;
                dp[new_mask] = min(dp[new_mask], dp[mask] + a[i][j]);
            }
        }
        if(__builtin_popcount(mask) <= k) res = min(res, dp[mask]);
    }
    cout << res;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int t = 1;
    // cin >> t;
    while(t--){
        solve();
    }
    return 0;
}

Compilation message (stderr)

kronican.cpp:6:26: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
    6 | const int mn = 21, inf = 1e18;
      |                          ^~~~

• Subtask 1: 100 / 100