Stones

input/code.cpp: In function 'int main()':
input/code.cpp:10:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1;i<S.size();i++){
                       ^

#include <iostream>
#include <string>
using namespace std;
int main(){

	cin.sync_with_stdio(false);
	string S;
	cin >> S;
	int p=0;
	for(int i=1;i<S.size();i++){
		if(S[i]==S[i-1]){
			p++;
		}
	}
	cout<<p;
	
}

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