**Making Change - Amazon Top Interview Questions**

### Problem Statement :

Find the minimum number of coins required to make n cents. You can use standard American denominations, that is, 1¢, 5¢, 10¢, and 25¢. Constraints 0 ≤ n < 2 ** 31 Example 1 Input n = 3 Output 3 Explanation You can make this with 3 pennies. Example 2 Input n = 5 Output 1 Explanation You can make this with a 5 cent coin. Example 3 Input n = 6 Output 2 Explanation You can make this with a 5 cent coin and a 1 cent coin.

### Solution :

` ````
Solution in C++ :
int solve(int n) {
return (n / 25 + (n % 25) / 10 + ((n % 25) % 10) / 5 + (n % 5));
}
```

` ````
Solution in Java :
import java.util.*;
class Solution {
public int solve(int n) {
int[] denominations = {25, 10, 5, 1};
int cointCount = 0;
for (int denomination : denominations) {
if (n / denomination > 0) { // can take this coin
cointCount += n / denomination;
n = n % denomination;
}
}
return cointCount;
}
}
```

` ````
Solution in Python :
class Solution:
def solve(self, n):
total = 0
for coin in [25, 10, 5, 1]:
this_coin = n // coin
total += this_coin
n -= coin * this_coin
if n == 0:
break
return total
```

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