[2KY]

pawn Код:

#define PRESSED(%0) \
    (((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))

Set a timer for 20 seconds, create a new variable like so...

pawn Код:

new TimesPressed [ MAX_PLAYERS ] = 0, TimerActive [ MAX_PLAYERS ] = 0;
SetTimerEx ( "PressedNumberofTimes", 20000, false, "i", playerid );

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if( PRESSED ( KEY_SPRINT ) )
    {
        if( TimerActive [ playerid ] == 1 )
        {
            TimesPressed [ playerid ] ++;
        }
    }
    return true;
}

forward PressedNumberofTimes ( playerid );
public PressedNumberofTimes ( playerid )
{
    if( TimesPressed [ playerid ] >= 20 )
    {
        // Success!
        TimesPressed [ playerid ] = 0;
    }
    else
    {
        // Failure!
    }
    return true;
}