题解 | 拍照队形

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

int main() {
    int N;
    int count = 0;
    cin >> N;
    string s;
    cin.ignore();
    getline(cin, s);
    int n = N / 3;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < i; j++) {
            cout << ' ';
        }
        cout << s[count++];
        for (int j = 0; j < 2 * (n - i) - 1; j++) {
            cout << ' ';
        }
        cout << s[count++] << endl;
    }
    for (int i = count; i < N; i++) {
        for (int j = 0; j < n; j++) {
            cout << ' ';
        }
        cout << s[i] << endl;
    }
    return 0;
}