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2 months ago
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#include <iostream> using namespace std; int main() { int n; while(cin>>n){ if(n==0) break; int ans=1; for(int i=1;i*i<=n;i++){ ans=max(ans,i*i); } cout<<ans<<endl; } return 0; }
#include <iostream> using namespace std; int main() { int n; while(cin>>n){ if(n==0) break; int ans=1; for(int i=1;i*i<=n;i++){ ans=max(ans,i*i); } cout<<ans<<endl; } return 0; }