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Codeforces Round #247 (Div. 2) B - Shower Line

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#include <iostream>#include <vector>#include <algorithm>using namespace std;int main(){    vector<int> a(5);    for(int i = 0; i < 5; ++ i) a[i] = i;    int g[5][5];    for(int i = 0 ; i < 5; ++ i){        for(int j = 0 ; j < 5; ++ j){            cin >> g[i][j];        }    }    int maxHappiness = 0;    do{        maxHappiness = max(g[a[1]][a[0]]+g[a[0]][a[1]]+g[a[3]][a[2]]+g[a[2]][a[3]]+g[a[2]][a[1]]+g[a[1]][a[2]]+g[a[4]][a[3]]+g[a[3]][a[4]]+g[a[3]][a[2]]+g[a[2]][a[3]]+g[a[4]][a[3]]+g[a[3]][a[4]],maxHappiness);        cout<<a[0]<<a[1]<<a[2]<<a[3]<<a[4]<<endl;        cout<<maxHappiness<<endl;            }while(next_permutation(a.begin(),a.end()));    cout<<maxHappiness<<endl;    }