Submission #3426266

---

Source Code Expand

#include<bits/stdc++.h>
#define REP(i, n) for(int i = 0; i < n; ++i)
#define FOR(i, a, b) for(int i = a; i < b; ++i)
#define F first
#define S second
#define OUT(x) cout << (x) << "\n"
using namespace std;
using point = pair< int,int >;
using ll = long long;

int main() {
    int cnt = 0;
    int bit; // 0 : B, 1 : W
    string str;
    cin >> str;

    if (str[0] == 'B') {
        bit = 0;
    } else {
        bit = 1;
    }

    FOR(i, 1, str.size()) {
        if (bit && str[i] == 'B') {
            cnt++;
            bit = !bit;
        } else if (!bit && str[i] == 'W') {
            cnt++;
            bit = !bit;
        }
    }

    OUT(cnt);

    return 0;
}

Submission Info

Judge Result