Vertical Writing

签到。

#include <bits/stdc++.h>

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    int n;
    std::cin >> n;
    std::vector<std::string> a(n);

    int m = 0;
    for (auto &it : a) {
        std::cin >> it;
        m = std::max(m, (int)it.size());
    }

    for (auto &it : a) {
        it += std::string(m - it.size(), '*');
    }

    for (int j = 0; j < m; j++) {
        std::string s = "";
        for (int i = n - 1; i >= 0; i--) {
            s += a[i][j];
        }
        while (s.size() && s.back() == '*') {
            s.pop_back();
        }
        std::cout << s << '\n';
    }

    return 0;
}