Submission #1221355

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
#define REP(i, n) for (int i = 0; i < int(n); ++i)
#define REPE(i, a, b) for (int i = (a); i <= int(b); ++i)
#define SZ(x) ((int)(x).size())
#define ALL(x) x.begin(), x.end()
#define PB push_back
#define EB emplace_back
using LL = long long;
using PII = pair<int, int>;
#define F first
#define S second

int n, a[100010];

int main() {
  scanf("%d", &n);
  REP(i, n) scanf("%d", &a[i]);
  int ans = 0;
  for (int i = 0; i < n;) {
    ans++;
    int cur = 0;
    int j = i + 1;
    while (j < n) {
      int v = 0;
      if (a[j] != a[j - 1]) {
        v = a[j] > a[j - 1] ? 1 : -1;
      }
      if (cur == v || cur == 0 || v == 0) {
        if (cur == 0) cur = v;
        j++;
      }
      else break;
    }
    i = j;
  }
  printf("%d\n", ans);
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:17:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &n);
                  ^
./Main.cpp:18:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   REP(i, n) scanf("%d", &a[i]);
                               ^

Judge Result