Submission #375571

#	Time	Username	Problem	Language	Result	Execution time	Memory
375571		iliccmarko	Vještica (COCI16_vjestica)	C++14	160 / 160	135 ms	8808 KiB

vjestica

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define endl "\n"
#define INF 100000000
#define LINF 1000000000000000LL
#define pb push_back
#define all(x) x.begin(), x.end()
#define len(s) (int)s.size()
#define test_case { int t; cin>>t; while(t--)solve(); }
#define single_case solve();
#define line cerr<<"----------"<<endl;
#define ios { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); cerr.tie(NULL); }
#define mod 1000000007LL
ll cnt[20][30];
ll n;
ll dp[1000005];

ll prefix_cnt(int mask)
{
    ll maks[30];
    for(int i = 0;i<30;i++) maks[i] = INF;
    for(int i = 0;i<n;i++)
    {
        int bit = (mask>>i)&1;
        if(bit) {
            for(int j = 0;j<26;j++) maks[j] = min(maks[j], cnt[i][j]);
        }
    }
    ll l = 0;
    for(int i = 0;i<26;i++) l += maks[i];
    return l;
}


int main()
{
    ios
    cin>>n;
    for(int i = 0;i<1000005;i++) dp[i] = -1;
    for(int i = 0;i<n;i++)
    {
        string s;
        cin>>s;
        for(char c : s)
        {
            cnt[i][c-'a']++;
        }
    }
    ll p = prefix_cnt((1<<n)-1);
    for(int i = 0;i<n;i++)
    {
        int c = 0;
        for(int j = 0;j<26;j++) c += cnt[i][j];
        dp[1<<i] = c;
    }

    for(int mask = 1;mask<(1<<n);mask++)
    {
        if(dp[mask]!=-1) continue;
        ll c = prefix_cnt(mask);
        dp[mask] = INF;
        for(int sub_mask = (mask-1)&mask;sub_mask>0;sub_mask=(sub_mask-1)&mask)
        {
            dp[mask] = min(dp[mask], dp[sub_mask] + dp[mask^sub_mask] - c);
        }
    }

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



    return 0;
}

Compilation message (stderr)

vjestica.cpp: In function 'int main()':
vjestica.cpp:50:8: warning: unused variable 'p' [-Wunused-variable]
   50 |     ll p = prefix_cnt((1<<n)-1);
      |        ^

• Subtask 1: 160 / 160