Submission #889376

#	Time	Username	Problem	Language	Result	Execution time	Memory
889376		hieupham1103	Vještica (COCI16_vjestica)	C++17	0 / 160	33 ms	1372 KiB

vjestica

#include"bits/stdc++.h"
#define int long long
//#define double long double
#define ii pair <int,int>
#define fi first
#define se second
#define endl '\n'
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
using namespace std;

struct dt{
    int a[26];
    int len = 0;
} a[20];

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

signed main(){
    //freopen("input.INP", "r", stdin);
    //freopen("output.OUT", "w", stdout);
    if (fopen(".inp", "r")) {
        freopen(".inp", "r", stdin);
        freopen(".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int n;
    cin >> n;
    for (int i = 0; i < n; i++){
        string s;
        cin >> s;
        for (auto x: s){
            a[i].a[x - 'a']++;
        }
        a[i].len = s.length();
    }

    // for (int i = 0; i <=n; i++){
    //     for (int j = 0; j <= 25; j++){
    //         cout << a[i].a[j] << " ";
    //     }
    //     cout << endl;
    // }

    for (int i = 0; i < n; i++){
        for (int j = 0; j < n; j++){
            int cnt = 0;
            for (int x = 0; x <= 25; x++){
                cnt += min(a[i].a[x], a[j].a[x]);
            }
            co[i][j] = cnt;
        }
    }

    for (int mask = 1; mask < (1 << n); mask++){
        for (int i = 0; i < n; i++){
            if (mask & (1 << i)){
                int laMask = mask ^ (1 << i);
                int res = a[i].len;
                for (int j = 0; j < n; j++){
                    if (laMask & (1 << j)){
                        res = min(res, a[i].len - co[i][j]);
                    }
                }   
                dp[mask] = max(dp[mask], dp[laMask] + res);
            }
        }
    }

    cout << dp[(1 << n) - 1] + 1;
    return 0;
}

Compilation message (stderr)

vjestica.cpp: In function 'int main()':
vjestica.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         freopen(".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
vjestica.cpp:25:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         freopen(".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 160