HackerRank_CountingValleys

//Counting Valleys
#include <iostream>
using namespace std;
int main()
{
    long long int n, lvl=0, dwn=0, val=0;
    char z;
    cin >> n;
    for(int i=0;i<n;i++)
    {
        cin >> z;
        if(z=='U'){lvl+=1;}
        else if(z=='D'){lvl-=1;}

        if(lvl<0 && dwn!=1){dwn=1;}
        if(dwn==1 && lvl>=0){val+=1;dwn=0;}
    }
    cout<<val;
    return 0;
}