oj.uz

답안 #873907

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
873907 2023-11-16T02:40:11 Z noiaint Kronican (COCI16_kronican) C++17
100 / 100
 701 ms 4564 KB 
#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
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 8 ms 4564 KB Output is correct
6 Correct 15 ms 4444 KB Output is correct
7 Correct 32 ms 4560 KB Output is correct
8 Correct 68 ms 4444 KB Output is correct
9 Correct 698 ms 4440 KB Output is correct
10 Correct 701 ms 4540 KB Output is correct