Bittijono

input/code.cpp: In function 'int main()':
input/code.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 1; i < b.size(); i++) {
                     ~~^~~~~~~~~~
input/code.cpp:28:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < e.size(); i++) {
                     ~~^~~~~~~~~~

//b2
#include <bits/stdc++.h>
using namespace std;
typedef unsigned long ul;

int main() {
    string b;
    cin >> b;
    ul c = 0;
    vector <ul> e;
    vector <ul> o;
    if (b[0] == '0') {
        e.push_back(1);
        o.push_back(0);
    } else {
        e.push_back(0);
        o.push_back(1);
    }
    for (int i = 1; i < b.size(); i++) {
        if (b[i] == '0') {
            e.push_back(e[i-1]+1);
            o.push_back(o[i-1]);
        } else {
            e.push_back(o[i-1]);
            o.push_back(e[i-1]+1);
        }
    }
    for (int i = 0; i < e.size(); i++) {
        // cout << e[i] << endl;
        c += e[i];
    }
    cout << c << "\n";
    return 0;
}

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: ACCEPTED

Test 16

Group: 3

Verdict: ACCEPTED

Test 17

Group: 3

Verdict: ACCEPTED

Test 18

Group: 3

Verdict: ACCEPTED

Test 19

Group: 3

Verdict: ACCEPTED

Test 20

Group: 3

Verdict: ACCEPTED

Test 21

Group: 3

Verdict: ACCEPTED