Editorial for WC '18 Contest 4 J1 - A Fistful of Quarters - Olympiads Online Judge

Editorial for WC '18 Contest 4 J1 - A Fistful of Quarters

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$D$ $D$ dollars is equivalent to $4D$ $4 D$ quarters. If $Q \ge 4D$ $Q \geq 4 D$ , no additional quarters are required, while if $Q < 4D$ $Q < 4 D$ , $4D-Q$ $4 D - Q$ additional quarters are required. Equivalently, the answer may be expressed as $\max(0, 4D-Q)$ $max (0, 4 D - Q)$ .

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