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Submission #1085591

# Submission time Handle Problem Language Result Execution time Memory
1085591 2024-09-08T13:07:07 Z CrabCNH Kronican (COCI16_kronican) C++14
0 / 100
 53 ms 17244 KB 
#include <bits/stdc++.h>

#define int long long
#define pii pair <int, int>
#define fi first
#define se second

using namespace std;

const int N = 20 + 5;
const int inf  = 1e18 + 7;

int n, k;
int c[N][N];
int dp[1 << 20];

void read () {
    #define task "crab"
    if (fopen (task".inp", "r")) {
        freopen (task".inp", "r", stdin);
        freopen (task".out", "w", stdout);
    }
}

bool bit (int x, int i) {
    return ((x >> i) & 1);
}
 
int flip (int x, int i) {
    return (x | (1 << i));
}

signed main () {
    ios_base :: sync_with_stdio (0);
    cin.tie (0);
    read ();
    cin >> n >> k;
    for (int i = 1; i <= n; i ++) {
        for (int j = 1; j <= n; j ++) {
            cin >> c[i][j];
        }
    }
    memset(dp, 0x3f, sizeof dp);
    int ans = dp[0];
    dp[(1 << n) - 1] = 0;
    for (int x = (1 << n) - 1; x >= 0; x --) {
        for (int i = 1; i <= n; i ++) {
            if (bit(x, i - 1)) {
                int y = flip (x, i);
                int cost = inf;
                for (int j = 1; j <= n; j ++) {
                    if (bit (y, j - 1)) {
                        cost = min(cost, c[i][j]);
                    }
                }
                dp[y] = min(dp[y], dp[x] + cost);
            }
        }
    }
 
    for (int mask = 1; mask < (1 << n); mask ++) {
        if (__builtin_popcount(mask) <= k) ans = min(ans, dp[mask]);
    }
 
    cout << ans;
}

Compilation message

kronican.cpp: In function 'void read()':
kronican.cpp:20:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |         freopen (task".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
kronican.cpp:21:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen (task".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 8536 KB Output isn't correct
2 Incorrect 3 ms 8540 KB Output isn't correct
3 Incorrect 4 ms 8540 KB Output isn't correct
4 Incorrect 3 ms 8480 KB Output isn't correct
5 Incorrect 8 ms 8540 KB Output isn't correct
6 Incorrect 14 ms 8540 KB Output isn't correct
7 Incorrect 26 ms 8540 KB Output isn't correct
8 Incorrect 53 ms 8540 KB Output isn't correct
9 Runtime error 9 ms 17244 KB Execution killed with signal 11
10 Runtime error 10 ms 17200 KB Execution killed with signal 11