Submission #1235768

#	Time	Username	Problem	Language	Result	Execution time	Memory
1235768		CodeLakVN	Vještica (COCI16_vjestica)	C++20	160 / 160	80 ms	1348 KiB

vjestica

#include <bits/stdc++.h>
using namespace std;

#define task "main"
#define no "NO"
#define yes "YES"
#define F first
#define S second
#define vec vector
#define _mp make_pair
#define ii pair<int, int>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define evoid(val) return void(std::cout << val)
#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define FOD(i, b, a) for(int i = (b); i >= (a); --i)

template<class X, class Y>
    bool minimize(X &x, Y y) {
        if (x > y) {
            x = y;
            return true;
        }
        return false;
    }

const int MAX_N = 20;

int n;
string s[MAX_N];
int cnt[28][MAX_N];
int dp[1 << 16];

void solve() {
    cin >> n;
    FOR(i, 1, n) cin >> s[i];

    memset(cnt, 0, sizeof(cnt));

    FOR(i, 1, n) {
        s[i] = " " + s[i];
        int m = (int)s[i].size() - 1;
        FOR(j, 1, m) cnt[s[i][j] - 'a'][i]++;
    }

    memset(dp, 0x3f, sizeof(dp));
    FOR(i, 1, n) {
        dp[1 << (i - 1)] = 0;
        FOR(c, 0, 25) dp[1 << (i - 1)] += cnt[c][i];
    }

    FOR(mask, 1, (1 << n) - 1) {
        if (__builtin_popcount(mask) == 1) continue;
        int maxPrefix = 0;
        FOR(c, 0, 25) {
            int minn = INT_MAX;
            FOR(i, 0, n - 1) if (mask >> i & 1) minimize(minn, cnt[c][i + 1]);
            maxPrefix += minn;
        }
        for (int subMask = mask; subMask; subMask = (subMask - 1) & mask)
            minimize(dp[mask], dp[subMask] + dp[mask ^ subMask] - maxPrefix);
    }

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

int32_t main() {
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    bool multitest = 0;
    int numTest = 1;
    if (multitest) cin >> numTest;

    while (numTest--) {
        solve();
    }

    return 0;
}

/* Lak lu theo dieu nhac!!!! */

Compilation message (stderr)

vjestica.cpp: In function 'int32_t main()':
vjestica.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
vjestica.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 160 / 160