Check out example codes for "counting valleys hackerrank solution in c++". It will help you in understanding the concepts better.

Code Example 1

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

int main() {
    int n,updown = 0,res = 0;
    char c;
    cin >> n;
    
    for(int i = 0; i++ < n;){
        cin >> c;
        if(c == 'U')updown++;
        else updown--;
        if(updown == 0 && c == 'U')res++;
    }
    cout << res << endl;
    return 0;
}

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