Forgotten measurements

input/code.cpp: In function 'int main()':
input/code.cpp:22:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(ll i=0; i<s.size(); i +=2){
      |                 ~^~~~~~~~~

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

using namespace std;
typedef long long ll;

#define UPLEFT 0
#define UPRIGHT 1
#define DOWNLEFT 2
#define DOWNRIGHT 3


int main(){
    string s;
    cin >> s;

    vector<ll> count(4,0);


    for(ll i=0; i<s.size(); i +=2){
        if(s[i]=='U' and s[i+1]=='L')count[UPLEFT] +=1;
        else if(s[i]=='L' and s[i+1]=='U')count[UPLEFT] +=1;

        else if(s[i]=='U' and s[i+1]=='R')count[UPRIGHT] +=1;
        else if(s[i]=='R' and s[i+1]=='U')count[UPRIGHT] +=1;

        else if(s[i]=='D' and s[i+1]=='L')count[DOWNLEFT] +=1;
        else if(s[i]=='L' and s[i+1]=='D')count[DOWNLEFT] +=1;

        else if(s[i]=='D' and s[i+1]=='R')count[DOWNRIGHT] +=1;
        else if(s[i]=='R' and s[i+1]=='D')count[DOWNRIGHT] +=1;

    }



    cout << max(count[UPLEFT], count[DOWNRIGHT]) + max(count[UPRIGHT], count[DOWNLEFT])  << endl;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: WRONG ANSWER

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