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CountingValleys.java
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49 lines (38 loc) · 1.2 KB
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import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;
public class Solution {
// Complete the countingValleys function below.
static int countingValleys(int n, String s) {
int sealevel = 0;
int count = 0;
for (int i = 0; i < n; i++) {
if (s.charAt(i)=='D') {
sealevel--;
}
if (s.charAt(i)=='U') {
sealevel++;
}
if (sealevel==0 && s.charAt(i)=='U') {
count++;
}
}
return count;
}
private static final Scanner scanner = new Scanner(System.in);
public static void main(String[] args) throws IOException {
BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
int n = scanner.nextInt();
scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
String s = scanner.nextLine();
int result = countingValleys(n, s);
bufferedWriter.write(String.valueOf(result));
bufferedWriter.newLine();
bufferedWriter.close();
scanner.close();
}
}