oj.uz

Submission #479441

# Submission time Handle Problem Language Result Execution time Memory
479441 2021-10-11T21:08:03 Z Habitus Vještica (COCI16_vjestica) C++14
160 / 160
 760 ms 1000 KB 
#include<bits/stdc++.h>
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define dec(x, y) fixed << setprecision((y)) << (x)
#define xx first
#define yy second
#define srt(v) sort((v).begin(), (v).end())
#define srtr(v) sort((v).rbegin(), (v).rend())
#define pb push_back
#define popb pop_back
#define sz(a) (int)(a).size()
#define len(a) (int)(a).length()
#define mp make_pair

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

int n;
int s[16][26];
bool pos[66000];
ll memo[66000];
ll dp(int mask) {
    if(__builtin_popcount(mask)==1) {
        int l=log2(mask);
        ll duz=0LL;
        for(int i=0; i<26; ++i) {
            duz+=s[l][i];
        }
        return duz;
    }
    if(pos[mask]) return memo[mask];
    int p[26];
    for(int i=0; i<26; ++i) p[i]=2000000;
    for(int i=0; i<n; ++i) {
        if((1<<i)&mask) {
            for(int j=0; j<26; ++j) {
                p[j]=min(p[j], s[i][j]);
            }
        }
    }
    ll duz=0LL;
    for(int i=0; i<26; ++i) duz+=(ll)p[i];
    ll mini=2000000000000000LL;
    for(int sub=(mask-1)&mask; sub>0; sub=(sub-1)&mask) {
        if(__builtin_popcount(sub)<__builtin_popcount(mask^sub)) continue;
        mini=min(mini, dp(sub)+dp(mask^sub));
    }
    pos[mask]=1;
    return memo[mask]=mini-duz;
}
int main() {
    ios;
    cin >> n;
    for(int i=0; i<n; ++i) {
        string t; cin >> t;
        for(int j=0; j<len(t); ++j) {
            ++s[i][t[j]-'a'];
        }
    }
    cout << dp((1<<n)-1)+1LL;
    return 0;
}

Subtask #1
160.0 / 160.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 204 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 2 ms 332 KB Output is correct
4 Correct 682 ms 896 KB Output is correct
5 Correct 696 ms 904 KB Output is correct
6 Correct 760 ms 972 KB Output is correct
7 Correct 709 ms 1000 KB Output is correct
8 Correct 694 ms 992 KB Output is correct
9 Correct 690 ms 992 KB Output is correct
10 Correct 688 ms 984 KB Output is correct