/*
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
return 0;
}
*/
/*
#include <stdio.h>
int main ()
{
double height, weight, stdWeight, fatRate;
scanf ("%lf %lf ", &height,&weight);
//if(c=(a-100)*0.9)
stdWeight = (height - 100) * 0.9;
fatRate= (weight-stdWeight)*100/stdWeight;
if(fatRate<=10)
{
printf(" 정상");
}
if(10<fatRate<=20)
{
printf("과체중");
}
if(fatRate>20)
{
printf("비만");
}
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
double height,weight,stdWeight,fatRate;
scanf("%lf %lf",&height,&weight);
stdWeight=(height-100)*0.9;
fatRate=(weight-stdWeight)*100/stdWeight;
if(fatRate<=10)
{
printf("비만");
}
else if(fatRate<=20)
{
printf("과체중");
}
else
{
printf("정상");
}
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
int a,b,c;
scanf("%d %d",&a,&b);
c=((90-a)/5);
printf("%d", b+c);
return 0;
}
*/
/*
#include <stdio.h>
int main()
{
double height,weight,stdWeight,fatRate;
scanf("%lf %lf",&height,&weight);
stdWeight=(height-100)*0.9;
fatRate=(weight-stdWeight)*100/stdWeight;
if(fatRate<=10){
printf("정상");
}
else if(fatRate<=20){
printf("과체중");
}
else{
printf("비만");
}
return 0;
}
*/
/*
a=넣은 골
80= a
81=a+1
82=a+2
83=a+3
84+a+4
85=a
86
*/
#include <stdio.h>
int main()
{
int time,goal,fnllyGoal;
scanf("%d %d",&time, &goal);
if( time%5==0)
{
fnllyGoal=((90-time)/5);
printf("%d",fnllyGoal+goal);
}
else
{
fnllyGoal=((90-time)/5);
printf("%d", fnllyGoal+goal+1);
}
return 0;
}