#include <stdio.h>

int main() { int x,f; scanf("%d",&x);

f=x*x+2*x+5;
printf("%d",f);

return 0;

}

#include "bits/stdc++.h"
using namespace std;
int main(){
    int x;
    cin>>x;
    cout<<x*x+2*x+5;
    return 0;
}

#include <stdio.h>
int main()
{
    int a;
    scanf("%d",&a);
    printf("%d",a*a+2*a+5);
    return 0;
}
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#include<stdio.h> int main() { int x; scanf("%d",&x); printf("f=%d",xx+2x+5); return 0;

}这样对吗

#include<stdio.h> int main() { int x,f; scanf("%d",&x); f=xx+2x+5; printf("%d",f); return 0; }

#include<stdio.h> int main() { int f,x; scanf("%d",&x); f=xx+2x+5; printf("%d",f); return 0;

#include<iostream>
using namespace std;
int main()
{
    double n;
    cin >> n;
    cout << n*n + 2*n +5 <<endl;
    return 0;
}

#include<stdio.h> int main() { int f,x; scanf("%d",&x);

f=x*x+2*x+5;
printf("%d",f);
return 0;

}