/*
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
return 0;
}
*/
/*
정수
int %d
long long int %lld
실수
float %f
double %lf
문자
char %c
*/
/*
#include <stdio.h>
int main()
{
int a,b;
scanf("%d %d", &a, &b);
printf("%d\n", a+ b);
printf("%d\n", a- b);
printf("%d\n", a* b);
printf("%d\n", a/b);
printf("%d\n", a%b);
printf("%.2f", (float)a/b );
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
int a, b, c;
scanf("%d %d %d",&a,&b,&c);
printf("%lld\n",(long long int)a+b+c);
printf("%.1f",(a+b+c)/3.0);
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
int a;
scanf("%d",&a);
printf("%d",a);
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
long long int a, b;
scanf("%lld %lld", &a, &b);
printf("%lld",a+b);
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
int a,b;
scanf("%d %d", &a, &b);
printf("%.1f",a*b/2.0);
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
int a,b;
scanf("%d %d", &a,&b);
printf("%d+%d=%d\n",a,b,a+b);
printf("%d-%d=%d\n",a,b,a-b);
printf("%d*%d=%d\n",a,b,a*b);
printf("%d/%d=%d\n",a,b,a/b);
return 0;
}
*/