Stones

input/code.cpp: In function 'int main()':
input/code.cpp:28:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=1; i<s.length(); i++)
                             ^

#include <iostream>
#include <vector>
#include <stack>
#include <queue>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <unordered_set>
#include <stdio.h>
#include <string.h>
#include <unordered_map>
#include <fstream>
#include <set>
#include <map>

#define MOD 1000000007
#define ll long long
#define N (1<<17)
#define float double
#define str string

using namespace std;

int main(){
    string s;
    cin>>s;
    int v=0;
    for(int i=1; i<s.length(); i++)
        if(s[i-1]==s[i])
            v++;
    cout<<v<<endl;
    return 0;
}

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