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  1. import java.util.Scanner;
  2.  
  3. class Main {
  4.     public static void main(String[] args) {
  5.         Scanner scanner = new Scanner(System.in);
  6.         int n = scanner.nextInt();
  7.  
  8.         int[] b = new int[n + 1];
  9.         int[] left = new int[n + 1];
  10.         int[] right = new int[n + 1];
  11.         int[] valley = new int[n + 1];
  12.  
  13.         int sum = 0;
  14.  
  15.         // Input array b
  16.         for (int i = 1; i <= n; i++) {
  17.             b[i] = scanner.nextInt();
  18.         }
  19.         // set 0 as greater for left and right at first.. 
  20.         left[1] = 0;
  21.         for(int i = 2; i <= n; i++){
  22.         	if(b[i] < b[i-1]){
  23.         		left[i] = left[i-1] + 1;
  24.         	}
  25.         	else{
  26.         		left[i] = 0;
  27.         	}
  28.         }
  29.         right[n] = 0;
  30.         for(int i = n - 1; i >= 1; i--){
  31.         	if(b[i] < b[i+1]){
  32.         		right[i] = right[i+1] + 1;
  33.         	}
  34.         	else{
  35.         		right[i] = 0;
  36.         	}
  37.         }
  38.  
  39.         for(int i = 1; i <= n; i++){
  40.         	valley[i] = right[i] * left[i];
  41.         	sum += valley[i];
  42.         }
  43.  
  44.         System.out.println(sum);
  45.  
  46.         scanner.close();
  47.     }
  48. }
  49.  
Success #stdin #stdout 0.11s 54452KB
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https://ideone.com/vVSpi9
language:
Java (HotSpot 12)
created:
7 hours ago
visibility:
public

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