题解 | 单组_二维字符数组

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

int main() {
    int n,m;
    cin>>n>>m;
    string s,union_s = "";
    while (cin>>s) {
        union_s+=s;
    }
    reverse(union_s.begin(), union_s.end());
    int i = 0;
    while (n--) {
        cout<<union_s.substr(i,m)<<endl;
        i+=m;
    }
}
// 64 位输出请用 printf("%lld")