Submission #734981

#	Time	Username	Problem	Language	Result	Execution time	Memory
734981		bgnbvnbv	Vještica (COCI16_vjestica)	C++14	160 / 160	93 ms	1336 KiB

vjestica

#include<bits/stdc++.h>
#define TASKNAME "codeforce"
#define pb push_back
#define pli pair<int,int>
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxN=2e5;
const ll inf=1e18;
const ll mod=1e9+7;
ll n;
string s[20];
ll cnt[20][30]={0};
ll dp[1<<16];
void solve()
{
    cin >> n;
    for(int i=0;i<n;i++) cin >> s[i];
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<s[i].size();j++)
        {
            cnt[i][s[i][j]-'a']++;
        }
    }
    dp[0]=0;
    for(int i=1;i<(1<<n);i++)
    {
        dp[i]=inf;
        ll mn[26];
        for(int j=0;j<26;j++) mn[j]=1e8;
        for(int j=0;j<n;j++)
        {
            if(i>>j&1)
            {
                for(int k=0;k<26;k++)
                {
                    mn[k]=min(mn[k],cnt[j][k]);
                }
            }
        }
        ll sum=0;
        for(int j=0;j<26;j++)
        {
            sum+=mn[j];
        }
        //bool ok=true;
        if(__builtin_popcount(i)==1)
        {
            dp[i]=sum;
            continue;
        }
        for(int mask=i&-i;i-mask;mask=i&(mask-i))
        {
            dp[i]=min(dp[i],dp[mask]+dp[i-mask]-sum);
        }
        //if(ok) dp[i]=sum;
        //if(i==2) cout <<<<'\n';
    }
    cout << dp[(1<<n)-1]+1;
}
int main()
{
    fastio
    //freopen(TASKNAME".INP","r",stdin);
    //freopen(TASKNAME".OUT","w",stdout);
    solve();
}

Compilation message (stderr)

vjestica.cpp: In function 'void solve()':
vjestica.cpp:23:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         for(int j=0;j<s[i].size();j++)
      |                     ~^~~~~~~~~~~~

• Subtask 1: 160 / 160