/*#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
return 0;
}*/
//1116 1117 1118 1119 1120 1121 1122 1123
/*1114*/
/*#include <stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d",a+b);
return 0;
}*/
/*1115*/
/*#include <stdio.h>
int main()
{
long long int a,b;
scanf("%lld %lld",&a,&b);
printf("%lld",a+b);
return 0;
}*/
/*1116*/
/*#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;
}*/
/*
정수
int %d(O)
long long int %lld
실수
float %f
double %lf(O)
문자
char %c
*/
/*1117*/
/*
#include <stdio.h>
int main()
{
double a,b;
scanf("%lf %lf",&a,&b);
printf("%.2lf",a*b);
return 0;
}
*/
/* and(&&) or(||) !(a) !(a&&b)
0 0 0 0 1 1
0 1 0 1 1 1
1 0 0 1 0 1
1 1 1 1 0 0
*/
// 1056 1057 1058
/*1053*/
/*#include <stdio.h>
int main()
{
int a;
scanf("%d",&a);
printf("%d",!(a));
return 0;
}*/
/*1054*/
/*#include <stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d",(a&&b));
return 0;
}*/
/*1055*/
/*#include <stdio.h>
int main()
{
int a,b;
scanf("%d %d",&a,&b);
printf("%d",(a||b));
return 0;
}*/
/*1056*/
#include <stdio.h>
int main()
{
int a,b;
scanf()
}
/* (A)
0 0 0
0 1 1
1 0 1
1 1 0
*/