731A - Night at the Museum.cpp

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

// Code Written By: Vikash Patel

int main()
{
    string s;
    cin>>s;
    char prev='a';
    int r=0;
    for(int i=0;i<s.size();i++)
    {
        char curr=s[i];
        int right=abs(curr-prev);
        int left=abs(abs(curr-prev)-26);
        r+=min(right,left);
        prev=curr;
    }
    cout << r;
}