Submission #2712724

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Source Code Expand

#include <iostream>
#include <string>
#include <vector>
#include <climits>
#include <algorithm>
using namespace std;

int main() {
  int N, M;
  cin >> N >> M;
  int ans;
  if (N == 1) {
    if (M == 1) {
      ans = 1;
    } else if (M == 2) {
      ans = 0;
    } else {
      ans = M-2;
    }
  } else if (N == 2) {
    ans = 0;
  } else {
    if (M==1) {
      ans = N-2;
    } else if (M==2) {
      ans = 0;
    } else {
      ans = (N-2)*(M-2);
    }
  }
  cout << ans << endl;
}

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