vector是多余的，忽略掉就好

#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main() {
    string str;
    getline(cin, str);

    int count = 0;
    vector<int> nums;
    for (int i = 0; i < str.size(); i++) {
        if (str[i] == '.') break;
        if (str[i] != ' ') {
            count++;
        }
        if (str[i] != ' ' && (str[i + 1] == ' ' || str[i + 1] == '.')) {
            nums.push_back(count);
            cout << count << " ";
            count = 0;
        }
    }

    return 0;
}