Submission #547468

#	Time	Username	Problem	Language	Result	Execution time	Memory
547468		Olympia	Vještica (COCI16_vjestica)	C++17	160 / 160	114 ms	8032 KiB

vjestica

#include <cmath>
#include <iostream>
#include <set>
#include <climits>
#include <algorithm>
#include <cassert>
#include <vector>
#include <iomanip>
#include <type_traits>
#include <string>
#include <queue>
#include <map>

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
using namespace std;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin >> n;
    string vec[n];
    for (int i = 0; i < n; i++) cin >> vec[i];
    int cnt[n][26];
    int ans = 0;
    for (int i = 0; i < n; i++) {
        ans += vec[i].size();
        for (int j = 0; j < 26; j++) cnt[i][j] = 0;
        for (int j = 0; j < vec[i].size(); j++) cnt[i][vec[i][j] - 'a']++;
    }
    int dp[(1 << n)];
    int mn[(1 << n)][26];
    int myMin[(1 << n)];
    for (int i = 0; i < (1 << n); i++) {
        myMin[i] = 0;
        for (int j = 0; j < 26; j++) {
            mn[i][j] = INT_MAX;
            for (int k = 0; k < n; k++) if ((i & (1 << k))) mn[i][j] = min(mn[i ^ (1 << k)][j], cnt[k][j]);
            myMin[i] += mn[i][j];
        }
    }
    for (int i = 0; i < (1 << n); i++) dp[i] = 0;
    for (int msk = 1; msk < (1 << n); msk++) {
        if (__builtin_popcount(msk) == 1) continue;
        for (int sub_msk = msk; sub_msk; sub_msk = (sub_msk - 1) & msk) {
            dp[msk] = max(dp[msk], dp[sub_msk] + dp[msk ^ sub_msk] + myMin[msk]);
        }
    }
    cout << ans - dp[(1 << n) - 1] + 1;
}

Compilation message (stderr)

vjestica.cpp:15: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   15 | #pragma GCC optimization ("O3")
      | 
vjestica.cpp:16: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   16 | #pragma GCC optimization ("unroll-loops")
      | 
vjestica.cpp: In function 'int main()':
vjestica.cpp:30:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         for (int j = 0; j < vec[i].size(); j++) cnt[i][vec[i][j] - 'a']++;
      |                         ~~^~~~~~~~~~~~~~~

• Subtask 1: 160 / 160