本来以为 length 加特判能秒，结果还是红了4个点...

#include <iostream>
#include <string>
using namespace std;
int main() {
    int temp = 0;
    string in;
    cin >> in;
    for (int i = 0; i < in.length(); i++) {
        if (in.at(i) == ' ') {
            temp++;
        }
    }
    cout << in.length() - temp;
    return 0;
}