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  1. Prepare
  2. Algorithms
  3. Implementation
  4. Counting Valleys
  5. Discussions

Counting Valleys

  • ConfusedSage
     + 0 comments
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        String s = sc.next();
        
        int nOV = 0;     // no of valleys
        int altitude = 0;   // current level
        for(char c : s.toCharArray()){
            if(altitude == 0 && c == 'D')
            nOV++;
	altitude= (c=='D')? --altitude : ++ altitude; 
		}
	System.out.println(nOV);
	}