Stones

input/code.cpp: In function 'int main()':
input/code.cpp:19:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 1; i < s.size(); i++){
                             ^

#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <string>
#include <utility>
#include <algorithm>
#include <iomanip>

using namespace std;

typedef long long LL;

int main(){
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  string s; cin >> s;
  int ans = 0;
  for(int i = 1; i < s.size(); i++){
    if(s[i] == s[i-1]) ans++;
  }
  cout << ans << endl;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED