Stones

input/code.cpp: In function 'int main()':
input/code.cpp:8:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i=1; i<s.size(); ++i) if (s[i]==s[i-1]) ++ans;
                          ^

#include <iostream>
using namespace std;
string s;

int main(){
  cin >> s;
  int ans=0;
  for (int i=1; i<s.size(); ++i) if (s[i]==s[i-1]) ++ans;
  cout << ans << "\n";
}

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