Forgotten measurements

input/code.cpp: In function 'void solve()':
input/code.cpp:13:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for (int i = 1; i < s.size(); i++)
      |                     ~~^~~~~~~~~~

#include <bits/stdc++.h>
#include <iostream>

#define int long long
using namespace std;

void solve()
{
    string s;
    cin >> s;

    int size = s.size();
    for (int i = 1; i < s.size(); i++)
        if (s[i-1] == s[i])
            size--;
    if (s[0] == s.back())
        size--;

    int c = size / 3;
    if (size % 3 != 0)
        c++;

    cout << c;
}

signed main()
{
    int t = 1;
    // cin >> t;
    for (int i = 0; i < t; i++)
        solve();
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: WRONG ANSWER