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已解决
资深光能
#include<iostream>
using namespace std;
int main(){
long long s=0,a=0,k;
cin>>k;
while(s<=k){
a=a+2;
s+=a;
}
cout<<a-1;
return 0;
}
#include<iostream>
using namespace std;
int main(){
long long s=0,a=0,k;
cin>>k;
while(s<=k){
a=a+2;
s+=a;
}
cout<<a-1;
return 0;
}
60分
