Cases to find maximum number of digits to be removed
if ( zero > 0 ) Console . Write ( N - 1 + " ▁ " ) ; else if ( one > 0 && two > 0 ) Console . Write ( N - 2 + " ▁ " ) ; else if ( one > 2 two > 2 ) Console . Write ( N - 3 + " ▁ " ) ; else Console . Write ( - 1 + " ▁ " ) ; }