题解 | 乒乓球

#include <bits/stdc++.h>
using namespace std;
string s;
int wo, dui;
int main() {
    cin >> s;
    for (int i = 0; i < s.size(); i++) {
        if (s[i] == 'W') {
            wo++;
        } else {
            dui++;
        }
        if ((wo >= 11 || dui >= 11) && (wo - dui >= 2 || dui - wo >= 2)) {
            cout << wo << ':' << dui << "\n";
            wo = 0;
            dui = 0;
        }
    }
    cout << wo << ':' << dui << "\n";
    cout << "\n";
    wo = 0;
    dui = 0;
    for (int i = 0; i < s.size(); i++) {
        if (s[i] == 'W') {
            wo++;
        } else {
            dui++;
        }
        if ((wo >= 21 || dui >= 21) && (wo - dui >= 2 || dui - wo >= 2)) {
            cout << wo << ':' << dui << "\n";
            wo = 0;
            dui = 0;
        }
    }
    cout << wo << ':' << dui << "\n";
    return 0;
}