BOJ 22113 - 창영이와 버스 [C++]

문제

링크

풀이

#include <iostream>
#include <vector>
using namespace std;
 
void solve(void) {
  int n, m; cin >> n >> m;
  vector<int> v(m);
  for (int i=0; i<m; i++) cin >> v[i], v[i]--;
  vector<vector<int>> a(n, vector<int>(n));
  for (int i=0; i<n; i++) for (int j=0; j<n; j++) cin >> a[i][j];
 
  int ans = 0;
  for (int i=1; i<m; i++) {
    ans += a[v[i-1]][v[i]];
  }
  cout << ans;
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  solve();
  return 0;
}