pat1031 Hello World for U

#include<cstdio>#include<iostream>#include<algorithm>#include<vector>#include<queue>#include<string>#include<cstring>#include<cmath>#include<map>#define ll long longusing namespace std;string x[100];int main(){string s;cin>>s;int l = s.length();int a,b,c;for(b = 1;b<=l;b++){int tmp = l+2-b;if(tmp%2)continue;if(tmp/2<=b){a = c = tmp/2;break;}}for(int i = 0;i<a-1;i++){x[i] = s[i];for(int j = 0;j<b-2;j++)x[i]+=' ';x[i]+=s[l-i-1];cout<<x[i]<<endl;}for(int i = a-1;i<a+b-1;i++)cout<<s[i];return 0;}