/*
#include <stdio.h>
int main()
{
printf("Hello");
return 0;
}
*/
/*#include <stdio.h>
int main()
{
printf("Hello World");
return 0;
}
*/
/*#include <stdio.h>
int main()
{
printf("Hello\nWorld");
return 0;
}
*/
/*#include <stdio.h>
int main()
{
printf("\'Hello\'");
return 0;
}
*/
/*#include <stdio.h>
int main()
{
printf("\"Hello World\"");
return 0;
}
*/
/*#include <stdio.h>
int main()
{
printf("\"!@#$%^&*()\"");
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
printf("\"C:\\Download\\hello.cpp\"");
return 0;
}
*/
/*
data type
정수 int
실수 float
문자 char
#include <stdio.h>
int main()
{
int a;
float r;
char t;
scanf("%d",&a);
printf("%d",a);
scanf("%f",&r);
printf("%f",r);
scanf("%c",&t);
printf("%c",t);
return 0;
}
1010-1017
*/
/*#include <stdio.h>
int main()
{
int n;
scanf("%d",&n);
printf("%d",n);
return 0;
}
*/
/*#include <stdio.h>
int main()
{
char x;
scanf("%c", &x);
printf("%c", x);
return 0;
}
*/
/*#include <stdio.h>
int main()
{
float x;
scanf("%f", &x);
printf("%f", x);
return 0;
}
*/
/*#include <stdio.h>
int main()
{
int a,b;
scanf("%d%d",&a,&b);
printf("%d %d", a, b);
return 0;
}
*/
/*#include <stdio.h>
int main()
{
char x, y;
scanf("%c %c", &x, &y);
printf("%c %c", y, x);
return 0;
}
*/
/*#include <stdio.h>
int main()
{
float f;
scanf("%f", &f);
printf("%.2f", f);
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
int a;
scanf("%d", &a);
printf("%d %d %d", a, a, a);
return 0;
}
*/
/*
+ - * / %
int a;
4byte
-2147483648 ~ 2147483647
long long int b;
8byte %lld
int a, b;
printf("%lld",(long long int)a+b);
float a;
%f
double a;
%lf
1029
1030
1039
1040
1044
*/
/*#include <stdio.h>
int main()
{
double d;
scanf("%lf", &d);
printf("%.11lf",d);
return 0;
}
*/
/*#include <stdio.h>
int main()
{
long long int n;
scanf("%lld", &n);
printf("%lld",n);
return 0;
}
*/
/*#include <stdio.h>
int main()
{
long long int n,m;
scanf("%lld %lld", &n,&m);
printf("%lld",n+m);
return 0;
}
*/
/*#include <stdio.h>
int main()
{
int a;
scanf("%d", &a);
printf("%d", -a);
return 0;
}
*/
/*#include <stdio.h>
int main()
{
int a;
scanf("%d", &a);
printf("%lld", (long long int)a+1);
return 0;
}
#include <stdio.h>
int main()
{
int a,b ;
scanf("%d %d", &a,&b);
printf("%lld", (long long int)a+b);
return 0;
}
*/
/*
/ %
int a, b;
(long long int)a+b
a/b ==> 정수 몫
a%b ==> 정수 나머지
5/2 ==> 2
(float)a/b 2.5
*/
/*#include <stdio.h>
int main()
{
int a,b;
scanf("%d %d", &a,&b);
printf("%d",a/b);
return 0;
}
*/
#include <stdio.h>
int main()
{
int a,b ;
scanf("%d %d", &a,&b);
printf("%d",a%b);
return 0;
}