Submission #3811690

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

int main () {
  int N;
  cin >> N;
  vector<int> a(N);
  for(int i = 0; i < N; i++) {
    cin >> a.at(i);
  }
  bool u = false, d = false;
  int count = 1;
  for(int i = 0; i < N-1; i++) {
    if (u == false && d == false && a.at(i) < a.at(i+1)) u = true;
    else if (u == false && d == false && a.at(i) > a.at(i+1)) d = true;
    else if (u == true && a.at(i) > a.at(i+1)) {
      count++;
      u = false;
    }
    else if (d == true && a.at(i) < a.at(i+1)) {
      count++;
      d = false;
    }
  }
  cout << count << endl;
}

Submission Info

Judge Result