Submission #855902

#	Time	Username	Problem	Language	Result	Execution time	Memory
855902		wakandaaa	Kronican (COCI16_kronican)	C++17	100 / 100	696 ms	4544 KiB

kronican

#include <bits/stdc++.h>
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define getbit(x, i) (((x) >> (i)) & 1)
#define bit(x) (1 << (x))
#define file ""
using namespace std;

mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count());
long long rand(long long l, long long r) {
    return l + rd() % (r - l + 1);
}

const int N = 20 + 5;
const int mod = 1e9 + 7; // 998244353;
const int inf = INT_MAX;
const long long llinf = LLONG_MAX;
const int LOG = 25; // LOG + 1

template<class T> bool minimize(T &a, T b) {
    return a > b ? (a = b, true) : false;
}
template<class T> bool maximize(T &a, T b) {
    return a < b ? (a = b, true) : false;
}
template<class T> bool add(T &a, T b) {
    a += b;
    while (a > mod) a -= mod;
    return true;
}

int n, k;
int c[N][N];
int f[bit(20)];

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

//    freopen(file".inp", "r",stdin);
//    freopen(file".out", "w",stdout);

    cin >> n >> k;
    for (int i = 1; i <= n; ++i) for (int j = 1; j <= n; ++j)
        cin >> c[i][j];

    memset(f, 0x3f, sizeof f);
    int ans = f[0];
    f[bit(n) - 1] = 0;

    for (int x = bit(n) - 1; x >= 0; --x) {
        for (int i = 1; i <= n; ++i) if (getbit(x, i - 1)) {
            int y = (x ^ bit(i - 1));
            int cost = inf;
            for (int j = 1; j <= n; ++j) if (getbit(y, j - 1)) cost = min(cost, c[i][j]);
            f[y] = min(f[y], f[x] + cost);
        }
    }

    for (int mask = 1; mask < bit(n); ++mask) {
        if (__builtin_popcount(mask) <= k) ans = min(ans, f[mask]);
    }

    cout << ans;

    return 0;
}

• Subtask 1: 100 / 100