奇妙的数字--蓝桥杯

奇妙的数字


小明发现了一个奇妙的数字。它的平方和立方正好把0~9的10个数字每个用且只用了一次。

你能猜出这个数字是多少吗？

# include<cstdio># include<iostream># include<cstring># include<cmath># include<algorithm>using namespace std;char s1[11],s2[11];bool isD(char *a){if(strlen(a)<10) return false;char b[]={'0','1','2','3','4','5','6','7','8','9'};sort(a,a+strlen(a));for(int i=0;i<strlen(a);i++){if(a[i]!=b[i]) return false;}return true;}int main(){int k;for(k=1;k<1000;k++){int k1 =k*k;int k2=k*k*k;sprintf(s1,"%d",k1);sprintf(s2,"%d",k2);strcat(s1,s2);if(isD(s1)){printf("k =%d,s =%s\n",k,s1);}}return 0;}

k =69,s =0123456789

--------------------------------
Process exited with return value 0
Press any key to continue . . .