제출 #241890

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
241890		NONAME	Vještica (COCI16_vjestica)	C++14	32 / 160	205 ms	8824 KiB

vjestica

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;

const ll oo = 1e18;

ll n, dp[(1 << 20)], cnt[20][26];

ll calc(ll msk) {
    ll c[26] {};

    for (ll i = 0; i < 26; ++i)
        c[i] = n;

    for (ll i = 0; i < n; ++i)
        if ((1 << i) & msk) {
            for (ll j = 0; j < 26; ++j)
                c[j] = min(c[j], cnt[i][j]);
        }

    ll len = 0;

    for (ll i = 0; i < 26; ++i)
        len += c[i];

    return len;
}

ll solve(ll msk) {
    ll &res = dp[msk];
    if (res != -1)
        return res;

    res = oo;

    ll pr = calc(msk);

    if (__builtin_popcount(msk) == 1)
        return res = pr;

    for (ll i = (msk - 1) & msk; i > 0; i = (i - 1) & msk) {
        ll cur = solve(i) + solve(msk ^ i) - pr;
        res = min(res, cur);
    }

    return res;
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    #ifdef _LOCAL
        freopen("in", "r", stdin);
        freopen("out", "w", stdout);
    #endif // _LOCAL

    memset(dp, -1, sizeof(dp));
    cin >> n;
    for (ll i = 0; i < n; ++i) {
        string s;
        cin >> s;

        ll m = ll(s.size());

        for (ll j = 0; j < m; ++j)
            ++cnt[i][s[j] - 'a'];
    }

    cout << solve((1 << n) - 1) + 1;
}

• Subtask 1: 32 / 160