Coin Change Problem

CodeChefOpen on judge ↗

4. Problem statement: Alice has p no. of 5 rupee coins and q no. of 1 rupee coins. He wants to purchase an item for amount r. The merchant wants him to provide exact change. Alice want to pay using minimum number of coins. How many 5 rupee coins and 1 rupee coins will he use? If exact change is not possible then display -1. For Example: If input is No.of 5 rupee coins(p)= 3, no.of 1 rupee coin

HINT LADDERno hints yet

L1 Observation

L2 Technique

L3 Approach

L4 Pseudo-code

🔒

L5 Full solution

L5 unlocks only if you insist twice

solution.cppC++17

CodeSearch Tutor

Hints, not spoilers — it won’t hand over the full solution unless you insist.

voice by Sarvam AI