Bittijono

#include<bits/stdc++.h>
using namespace std;
 
int main() {
  string s; cin >> s;
  int n = s.length();
  bool b[s.length()];
  for(int i = 0; i < n; i++) {
    if(s[i] == '0') b[i] = 0;
    else b[i] = 1;
  }
  long cc = 0;
  // LOL for(int i = 0; i < n; i++) cout << b[i] << " ";
  for(int i = 0; i < n; i++) {
    long ones = 0;
    for(int j = i; j < n; j++) {
      if(b[j] == 1) ones++;
      if(ones%2==0) { cc++; /*cout << i << " :: " << j << "\n";*/ }
    }
  }
  cout << cc;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 1

Verdict: ACCEPTED

Test 7

Group: 1

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 2

Verdict: ACCEPTED

Test 12

Group: 2

Verdict: ACCEPTED

Test 13

Group: 2

Verdict: ACCEPTED

Test 14

Group: 2

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 16

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 17

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 18

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 19

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 20

Group: 3

Verdict: ACCEPTED

Test 21

Group: 3

Verdict: ACCEPTED