function countingValleys(steps: number, path: string): number {
    let currentDepth = 0;
    let valleys = 0;
    
    for (let i = 0; i < steps; i++) {     
        if (path[i] === "D" && currentDepth === 0) valleys ++;  
        currentDepth += path[i] === "U" ? 1 : -1;
    }
    
    return valleys;
}