int height[10];

int num=0;

int reach;

void read();

void judge();

void write();

int main()

{

read();

judge();

write();

return (0);

}

void read()

{

extern int height[];

extern int reach;

int i;

for(i=0;i<10;i++)

scanf("%d",&height[i]);

scanf("%d",&reach);

}

void judge()

{

extern int height[];

extern int num;

extern int reach;

int i;

for(i=0;i<10;i++)

{

if(reach+30>=height[i])

num++;

}

}

void write()

{

extern int num;

printf("%d",num);

}