Submission #88456

#	Time	Username	Problem	Language	Result	Execution time	Memory
88456		xiaowuc1	Kronican (COCI16_kronican)	C++14	100 / 100	816 ms	4820 KiB

kronican

#include <bits/stdc++.h>

using namespace std;

typedef pair<int, int> edge;

int w[20][20];
int dp[1<<20];

void solve() {
  int n, k;
  cin >> n >> k;
  for(int i = 0; i < n; i++) {
    for(int j = 0; j < n; j++) {
      cin >> w[i][j];
    }
  }
  int ret = 1 << 30;
  for(int mask = 0; mask < (1<<n); mask++) {
    dp[mask] = 1 << 30;
  }
  dp[(1<<n)-1] = 0;
  for(int mask = (1<<n)-1; mask >= 0; mask--) {
    int bits = __builtin_popcount(mask);
    if(bits == k) {
      ret = min(ret, dp[mask]);
    }
    if(bits <= k) continue;
    for(int i = 0; i < n; i++) {
      if(!(mask&(1<<i))) continue;
      for(int j = 0; j < n; j++) {
        if(i!=j && (mask&(1<<j))) {
          dp[mask^(1<<i)] = min(dp[mask^(1<<i)], dp[mask] + w[i][j]);
        }
      }
    }
  }
  cout << ret << endl;
}

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

• Subtask 1: 100 / 100