Section 1.2.4 Palindromic Squares 大水

http://www.wzoi.org/usaco/12%5C501.asp

patpat 学习了一个新的stl函数

eg.

　　string poi = "poi";

　　reverse(poi.begin(), poi.end());

就把poi变成了"iop"

#include <bits/stdc++.h>
using namespace std;
int base;

string trans(int temp){
    int j, ch;
    string ans = "";
    while(temp){
        ch = temp % base;
        if(ch < 10) ans += ch + ‘0‘;
        else ans+= ch - 10 +‘A‘;
        temp /= base;
    }
    return ans;
}
int main()
{

    #ifndef poi
        freopen("palsquare.in","r",stdin);
        freopen("palsquare.out","w",stdout);
    #endif
    string str;
    scanf("%d", &base);
    int i, temp, j, ch, len;
    for(i = 1; i <= 300; i++){
        str = trans(i * i);
        len = str.length();
        for(j = 0; j <= len / 2; j++){
            if(str[j] != str[len - j - 1])  break;
        }
        if(j <= len / 2)    continue;
        string tp = trans(i);reverse(tp.begin(), tp.end());
        cout<<tp<<" "<<str<<endl;

    }
    return 0;
}