USACO:Palindromic Squares;回文判断+进制转化
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/*TASK:palsquareLANG:C++ID:huibaochen*//*一题:给你一个数n代表进制,算出从1到300的数的平方转化为n进制后是否进回文序列,是的话输出这个是的n进制和这个数的平方的n进制*/#include <iostream>#include <stdio.h>#include <string.h>int m, n, len, num, r;char str[1000 +5], ch[100 + 5];using namespace std;void yes(int m){ num = m * m; len = 0; while(num){ r = num % n; num = num / n; if(r >= 0 && r <= 9) str[len++] = r + 48; else str[len++] = r + 'A' - 10; } for(int i = 0; i < len / 2; i++){ if(str[i] != str[len - 1 - i]) return; } len = 0; while(m){ r = m % n; m = m / n; if(r >= 0 && r <= 9) ch[len++] = r + 48; else ch[len++] = r + 'A' - 10; } for(int i = 0; i < len / 2; i++){ swap(ch[i], ch[len - i - 1]); } printf("%s %s\n", ch, str);}int main(){ freopen ("palsquare.in", "r", stdin); freopen ("palsquare.out", "w", stdout); scanf("%d", &n); for(int i = 1; i <= 300; i++){ yes(i); } return 0;}
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