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#include <fstream> #include <iostream> using namespace std; int main() { ios_base::sync_with_stdio(0); int mat[4][4] = {{0, 10, 15, 20}, {10, 0, 35, 25}, {15, 35, 0 ,30}, {20, 25, 30, 0} }; int arr[] = {0, 1, 2, 3}; int min_cost = 2e9; do { int cost = 0; for(int i = 0; i < 3; i++) { cost += mat[arr[i]][arr[i + 1]]; } cost += mat[arr[3]][arr[0]]; min_cost = min(min_cost, cost); } while(next_permutation(arr, arr + 4)); cout << min_cost << endl; return 0; }
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