#include <stdio.h>
int main(){
int n,i,j,k=0;
for(j=0;j<100000;j++){
scanf("%d",&n);
k=0;
if(n==0){
break;
}
else if (n % 2 == 0){
for (i = 0; i <= 4; i++,n+=2){
k=k+n;
}
}
else if (n % 2 != 0){
n++;
for (i = 0; i <= 4; i++,n+=2){
k=k+n;
}
}
printf("%d\n",k);
}
return 0;
}
int main(){
int n,i,j,k=0;
for(j=0;j<100000;j++){
scanf("%d",&n);
k=0;
if(n==0){
break;
}
else if (n % 2 == 0){
for (i = 0; i <= 4; i++,n+=2){
k=k+n;
}
}
else if (n % 2 != 0){
n++;
for (i = 0; i <= 4; i++,n+=2){
k=k+n;
}
}
printf("%d\n",k);
}
return 0;
}
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