41 lines
717 B
C++
41 lines
717 B
C++
#include<iostream>
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#include<cmath>
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#include<sstream>
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using namespace std;
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// bool is_pf(int n){
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// int a = sqrt(n);
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// if(a*a==n){
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// return true;
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// }else{
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// return false;
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// }
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// }
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bool is_huiwen(int n){
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stringstream ss;
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ss<<std::oct<<n;
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string bjz(ss.str());
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int j=bjz.size()-1;
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for(int i=0;i<(int)bjz.size();++i,--j){
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if(bjz[i]!=bjz[j]){
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return false;
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}
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}
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return true;
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}
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int main(){
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ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
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int n;
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cin>>n;
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const int sqrt_n = sqrt(n);
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for(int i=1;i<=sqrt_n;i++){
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if(is_huiwen(i*i)){
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cout<<i*i<<" ";
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}
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}
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cout<<endl;
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} |