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Submission #243642

# Submission time Handle Problem Language Result Execution time Memory
243642 2020-07-01T13:02:16 Z Vimmer Kronican (COCI16_kronican) C++14
100 / 100
 776 ms 8592 KB 
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")

#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define N 100010
#define M ll(1e9 + 7)
#define inf 1e9 + 1e9

using namespace std;
//using namespace __gnu_pbds;

typedef long double ld;
typedef long long ll;
typedef short int si;
typedef array <int, 2> a2;

//typedef tree <int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

ll mn[(1 << 20)], a[25][25];

int main()
{
    //freopen("input.txt", "r", stdin); //freopen("output4.txt", "w", stdout);

    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    int n, k;

    cin >> n >> k;

    for (int i = 0; i < n; i++)
      for (int j = 0; j < n; j++) cin >> a[i][j];

    ll ans = 1e18;

    for (int i = 0; i < (1 << 20); i++) mn[i] = 1e18;

    mn[(1 << n) - 1] = 0;

    for (int msk = (1 << n) - 1; msk >= 0; msk--)
    {
        if (__builtin_popcount(msk) > k)
        {
            for (int i = 0; i < n; i++)
              if ((1 << i) & msk)
              {
                  int nmsk = msk ^ (1 << i);

                  for (int j = 0; j < n; j++)
                    if ((1 << j) & nmsk) mn[nmsk] = min(mn[nmsk], mn[msk] + a[i][j]);
              }
        }
        else ans = min(ans, mn[msk]);
    }

    cout << ans << endl;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8576 KB Output is correct
2 Correct 9 ms 8576 KB Output is correct
3 Correct 9 ms 8576 KB Output is correct
4 Correct 10 ms 8576 KB Output is correct
5 Correct 15 ms 8576 KB Output is correct
6 Correct 24 ms 8576 KB Output is correct
7 Correct 42 ms 8576 KB Output is correct
8 Correct 77 ms 8576 KB Output is correct
9 Correct 776 ms 8592 KB Output is correct
10 Correct 69 ms 8576 KB Output is correct