Submission #168372

#	Time	Username	Problem	Language	Result	Execution time	Memory
168372		rzbt	Vještica (COCI16_vjestica)	C++14	160 / 160	111 ms	732 KiB

vjestica

#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define MAXN 18
typedef long long ll;


using namespace std;

int n;
char s[1000006];

int svi[MAXN][28];
int dp[(1<<MAXN)+5];
vector<int> tren;

int main()
{
    scanf("%d", &n);
    for(int i=0;i<n;i++){
        scanf("%s",s);
        int len=strlen(s);
        for(int j=0;j<len;j++)
            svi[i][s[j]-'a']++;

        dp[1<<i]=len;
    }
    for(int i=1;i<(1<<n);i++){
        if(__builtin_popcount(i)==1)continue;
        dp[i]=INT_MAX;
        tren.clear();
        int zajed=0,kolko=0;
        for(int j=0;j<n;j++){
            if((1<<j)&i)tren.pb(j);
        }
        kolko=(1<<tren.size())-1;
        for(int j=0;j<26;j++){
            int kek=10000066;
            for(auto x:tren)kek=min(kek,svi[x][j]);
            zajed+=kek;
        }
        for(int j = (i - 1) & i; j > 0; j = (j - 1) & i){

            //printf("    %d  %d     %d        %d\n",prvi,drugi,j,i);
            dp[i]=min(dp[i],dp[j]+dp[i^j]-zajed);
        }

    }
    printf("%d",1+dp[(1<<n)-1]);

    return 0;
}

Compilation message (stderr)

vjestica.cpp: In function 'int main()':
vjestica.cpp:35:21: warning: variable 'kolko' set but not used [-Wunused-but-set-variable]
         int zajed=0,kolko=0;
                     ^~~~~
vjestica.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
vjestica.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s",s);
         ~~~~~^~~~~~~~

• Subtask 1: 160 / 160