Submission #844839

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Source Code Expand

#include <cstdio>
#include <iostream>
#include <algorithm>
#include <string>
using namespace std;
int n;
int a[111111];
int main(void){
  cin >> n;
  for(int i = 0; i < n; i++){
    cin >> a[i];
  }

  int ans = 0;
  for(int i = 0; i < n; i++){
    ans += a[i]/2;
    if(i && a[i]%2 && a[i-1]%2){
      ans++;
      a[i]--;
    }
  }
  cout << ans << endl;
}

Submission Info

Judge Result