I want to work out the Time Complexity (eg T(n) = 7Cn³+1) of the following code in terms of number of operation:

for ( int i = 0; i < n; i += 5 ) {

for ( int j = 1; j < n; j *= 3 ) {

for ( int k = 1; k < n; k *= n ) {

// constant number C of operations

}

}

}

Need to show working as well