题解 | 左侧严格小于计数

#include <iostream>
#include <vector>
using namespace std;

int main() {
    int a, b, num;

    vector<int> vec;

    while (cin >> a) { // 注意 while 处理多个 case
        for (int i = 0; i < a; ++i) {
            cin >> b;
            vec.push_back(b);
        }

        for(auto it = vec.begin();it != vec.end();++it)
        {
            num = 0;
            for(auto it2 = vec.begin();it2 != it;++it2)
            {
                if(*it2 < *it) num++;
            }

            cout << num << " ";
        }
        
    }

    return 0;

}