Bittijono

input/code.cpp: In function 'int main()':
input/code.cpp:13:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=1;i<luku.size();i++){
                 ~^~~~~~~~~~~~
input/code.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<luku.size();i++){
                 ~^~~~~~~~~~~~
input/code.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=i;j<luku.size();j++){
                     ~^~~~~~~~~~~~
input/code.cpp:28:24: warning: 'counter' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cout << counter << "\n";
                        ^~~~

#include<bits/stdc++.h>
using namespace std;

string luku;
vector<int> su;
int main(){
    cin >> luku;
    if(luku[0]=='1'){
        su.push_back(1);
    }else{
        su.push_back(0);
    }
    for(int i=1;i<luku.size();i++){
        if(luku[i] == '1'){
            su.push_back(su[i-1]+1);
        }else{
            su.push_back(su[i-1]);
        }
    }
    int counter;
    for(int i=0;i<luku.size();i++){
        for(int j=i;j<luku.size();j++){
            if((su[j]-su[i-1])%2 == 0){
                counter++;
            }
        }
    }
    cout << counter << "\n";
}

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