When we multiply two numbers like **(10^18)*(10^18)** then it will exceed the * long long int max value*(i.e 10^18). In such case we

**use __int128**.

### 128-bit Integers:

**As an extension the integer scalar type __int128 is supported for targets** which have an integer mode wide enough

**to hold 128 bits**. Simply write

`__int128`

for a signed 128-bit integer, or `unsigned __int128`

for an unsigned 128-bit integer.Can be applied in the given question–>https://www.codechef.com/DRI22019/problems/VNFAR