Submission #249665

#	Time	Username	Problem	Language	Result	Execution time	Memory
249665		Mercenary	Vještica (COCI16_vjestica)	C++14	160 / 160	131 ms	1016 KiB

vjestica

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/trie_policy.hpp>

#define pb push_back
#define mp make_pair
#define taskname "A"

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> ii;
typedef tree <int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;

const int maxn = 5e5 + 5;
const int logn = log2(maxn) + 1;
int a[16][26];
int n;
int dp[1 << 16];
int tmp[1 << 16];

int get(int s){
    if(s == 0)return 0;
    int res = 0;
    for(int i = 0 ; i < 26 ; ++i){
        int tmp = 1e6;
        for(int j = 0 ; j < n ; ++j){
            if(s & (1 << j))tmp = min(tmp , a[j][i]);
        }
        res += tmp;
    }
    return res;
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen(taskname".INP","r")){
		freopen(taskname".INP", "r",stdin);
		freopen(taskname".OUT", "w",stdout);
    }
    cin >> n;
    for(int i = 0 ; i < n ; ++i){
        string s;cin >> s;
        for(auto & c : s)a[i][c - 'a']++;
    }
    memset(dp,123,sizeof dp);
    for(int i = 0 ; i < (1 << n) ; ++i)tmp[i] = get(i);
    for(int i = 0 ; i < n ; ++i)dp[1 << i] = 0;
    for(int i = 0 ; i < (1 << n) ; ++i){
        for(int j = (i - 1) & i ; j > 0 ; j = ((j - 1) & i)){
            dp[i] = min(dp[i] , dp[j] + dp[i ^ j] + tmp[j] + tmp[i ^ j] - 2 * tmp[i]);
        }
    }
    cout << 1 + get((1 << n) - 1) + dp[(1 << n) - 1];
}

Compilation message (stderr)

vjestica.cpp: In function 'int main()':
vjestica.cpp:41:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".INP", "r",stdin);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
vjestica.cpp:42:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".OUT", "w",stdout);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 160 / 160