FILL_IN_THE_BLANK:The output of the following program is @.
The output of the following program is @ @ [6 # 21 #] (3).
```
# include
int s;
int f(int m)
{
static int k=0;
for(; k<=m; k++) s++;
return s;
}
void main(void )
{
int s=1;
s=f(2)+f(2);
printf("%d#%d#", s, f(20));
return;
}
```
answer：Space 1: 6-21||
```
# include
int s;
int f(int m)
{
static int k=0;
for(; k<=m; k++) s++;
return s;
}
void main(void )
{
int s=1;
s=f(2)+f(2);
printf("%d#%d#", s, f(20));
return;
}
```
answer：Space 1: 6-21||
