...
#include <stdio.h>
int main(void)
{
int n,t;
scanf("%d",&n);
t=n%10;
if(t>=5)
n=(n/10+1)*10;
else
n=n/10*10;
printf("%d",n);
return 0;
}
int main(void)
{
int n,t;
scanf("%d",&n);
t=n%10;
if(t>=5)
n=(n/10+1)*10;
else
n=n/10*10;
printf("%d",n);
return 0;
}
