HSL Colors Combination

 HSL Colors Combination

PROBLEM STATEMENT 

Given string str which consists of only 3 letters representing the color,(H) Hue, (S) Saturation, (L) Lightness, called HSL colors. The task is to count the occurrence of ordered triplet “H, S, L” in a given string and give this count as the output.

Boundary Condition:

1 <= len(str) <= 1000

Example Input/Output 1: 
Input: () 
HHSL 
Output: 
2 

Explanation: 

There are two triplets of RGB in the given string:

=> H at index 0, S at index 2, and L at index 3 form one triplet of HSL.

=> H at index 1, S at index 2, and L at index 3 forms the second triplet of HSL.

Example Input/Output 2: 
Input: () 
SHL 
Output: 
0

Explanation: 

No triplets exist.

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SOLUTION :

C++ (CPP) :

       
#include <bits/stdc++.h>
 
using namespace std;

int main(int argc, char** argv)
{
    string s;
    cin>>s;
    int lightness=0,hue=0,i,result=0;
    for(i=0;i<s.size();++i) {
        if(s[i]=='L') lightness++;
    }
    for(i=0;i<s.size();++i) {
        if(s[i]=='L') lightness--;
        else if(s[i]=='H') hue++;
        else if(s[i]=='S') result+=(hue*lightness);
    }
    cout<<result;
}
 

PYTHON :

       
s=input().strip()
lightness=s.count('L')
hue=0
result=0
for i in s:
    if i=='L':
        lightness-=1
    elif i=='H':
        hue+=1
    elif i=='S':
        result+=(hue*lightness)
print(result)
 

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