Submission #1304440

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main() {
  char ch;
  ll res(0);
  ll current(0);
  int mode(5);
  while (cin >> ch) {
    if (mode == 5 && ch == '2') {
      mode = 2;
    } else if (mode == 5) {
      mode = 5;
      res += (current * (current + 1) / 2);
      current = 0;
    } else if (mode == 2 && ch == '5') {
      mode = 5;
      current++;
    } else if (mode == 2 && ch == '2') {
      mode = 2;
      res += (current * (current + 1) / 2);
      current = 0;
    } else if (mode == 2) {
      mode = 5;
      res += (current * (current + 1) / 2);
      current = 0;
    } else {
    }
  }
  res += (current * (current + 1) / 2);
  cout << res << endl;
}

Submission Info

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