Language: C++

#include<iostream>
#include<stdio.h>
#include<vector>
#include<algorithm>
#include<set>
#include<string>
#include<map>
#include<string.h>
#include<complex>
#include<math.h>
#include<queue>
#include <functional>
#include<time.h>
#include <stack>
#include<iomanip>
using namespace std;
#define rep(i,a,n) for(int i=(a);i<(n);i++)
#define ll long long
#define llint long long int
#define sort(s) sort(s.begin(),s.end())
#define reverse(v)  reverse(v.begin(), v.end());
#define Yes(ans) if(ans)cout<<"Yes"<<endl; else cout<<"No"<<endl;
#define YES(ans) if(ans)cout<<"YES"<<endl; else cout<<"NO"<<endl;
#define hei(a) vector<a>
#define whei(a) vector<vector<a>>
#define UF  UnionFind
#define rt0 return 0
#define INF 100000000
constexpr auto mod = 1000000007;
//辞書順はnext_permutation( begin( v ), end( v ) );やで！
 
 
//2のn乗を求めるよ！！！
int ni(int n) {
	if (n == 0)return 1;
	int x = ni(n / 2);
	x *= x;
	if (n % 2 == 1)x *= 2;
	return x;
}
 
//フィボナッチ数列のx番目を求めるよ！
llint f(int x, vector<llint>& s) {
	if (x == 0)return 0;
	if (x == 1)return 1;
	if (s[x] != 0)return s[x];
	return  s[x] = f(x - 1, s) + f(x - 2, s);
 
}
 
//aとｂの最大公約数を求めるよ！
llint gcd(llint a, llint b) {
	if (a < b)swap(a, b);
	if (b == 0)return a;
	return gcd(b, a % b);
}
 
 
 
// a^n mod を計算する
long long modpow(long long a, long long n, long long mod) {
	long long res = 1;
	while (n > 0) {
		if (n & 1) res = res * a % mod;
		a = a * a % mod;
		n >>= 1;
	}
	return res;
}
 
// mod. m での a の逆元 a^{-1} を計算するよ！
long long modinv(long long a, long long m) {
	long long b = m, u = 1, v = 0;
	while (b) {
		long long t = a / b;
		a -= t * b; swap(a, b);
		u -= t * v; swap(u, v);
	}
	u %= m;
	if (u < 0) u += m;
	return u;
}
 
 
//aCbをmod.mで割った余りを求める
ll int c(ll int a, ll int b, ll int m) {
	ll int ans = 1;
	for (ll int i = 0; i < b; i++) {
		ans *= a - i;
		ans %= m;
	}
	for (ll int i = 1; i <= b; i++) {
		ans *= modinv(i, m);
		ans %= m;
	}
	return ans;
}
 
//m進数のn桁を全列挙やで 
int dfs(int m, int n,vector<int> a,vector<int> s) {
  int MIN=100000000;
	stack<string> st;
	st.push("");
	while (!st.empty()) {
		string now = st.top();
		st.pop();
		if (now.size() == n){
          int x[3]={0};
          int y[3]={0};
          for(int i=0;i<n;i++){
            if(now[i]-'0'!=3){
            x[now[i]-'0']+=s[i];
            y[now[i]-'0']++;
            }
          }
          int sum=0;
          int ng=0;
          for(int i=0;i<3;i++){
            if(x[i]==0)ng=1;
            sum+=abs(x[i]-a[i]);
            if(y[i]>1)sum+=10*(y[i]-1);
          }
          if(ng==0)MIN=min(MIN,sum);
        }
		else {
			for (int i = m - 1; i >= 0; i--) {
				string next = now + to_string(i);
				st.push(next);
			}
		}
    }
  return MIN;
}
//迷路やで
void bfs(){
  int sx,sy;
  int gx,gy;
 int h,w;
  cin>>h>>w;
  cin>>sx>>sy>>gx>>gy;
  sx--;sy--;gx--;gy--;
  whei(char) a(h,vector<char>(w));
  whei(int) d(h,vector<int>(w,INF));
  rep(i,0,h)rep(j,0,w){
    cin>>a[i][j];
  }
  int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1};
  d[sx][sy]=0;
  queue<pair<int,int>> que;
  que.push(pair<int,int>(sx,sy));
  while(que.size()){
    pair<int,int>p=que.front();
    que.pop();
    if(p.first==gx&&p.second==gy)break;
    for(int i=0;i<4;i++){
      int nx=p.first+dx[i];
      int ny=p.second+dy[i];
      if(0<=nx&&0<=ny&&nx<h&&ny<w&&a[nx][ny]!='#'&&d[nx][ny]==INF){
        que.push(pair<int,int>(nx,ny));
        d[nx][ny]=d[p.first][p.second]+1;
      }
    }
  }
  cout<<d[gx][gy]<<endl;
}
void press(vector<int>& v) { v.erase(unique((v).begin(), (v).end()), v.end()); }
void press(vector<char>& v) { v.erase(unique((v).begin(), (v).end()), v.end()); }
 
llint min(llint a, llint b) {
	if (a < b)return a;
	return b;
}
llint max(llint a, llint b) {
	if (a < b)swap(a, b);
	return a;
}
llint p(int n) {
	if (n == 1)return 1;
	return n * p(n - 1);
}
struct UnionFind {
	vector<int> par; // par[i]:iの親の番号　(例) par[3] = 2 : 3の親が2
 
	UnionFind(int N) : par(N) { //最初は全てが根であるとして初期化
		for (int i = 0; i < N; i++) par[i] = i;
	}
	int size(int a) {
		return par[root(a)];
	}
 
	int root(int x) { // データxが属する木の根を再帰で得る：root(x) = {xの木の根}
		if (par[x] == x) return x;
		return par[x] = root(par[x]);
	}
 
	void unite(int x, int y) { // xとyの木を併合
		int rx = root(x); //xの根をrx
		int ry = root(y); //yの根をry
		if (rx == ry) return; //xとyの根が同じ(=同じ木にある)時はそのまま
		par[rx] = ry; //xとyの根が同じでない(=同じ木にない)時：xの根rxをyの根ryにつける
	}
 
	bool same(int x, int y) { // 2つのデータx, yが属する木が同じならtrueを返す
		int rx = root(x);
		int ry = root(y);
		return rx == ry;
	}
};
 
 
int main(){
  int n;
  cin>>n;
  int ans=0;
  hei(int) a(n);
  rep(i,0,n)cin>>a[i];
  rep(i,1,n-1){
    int x[]={a[i-1],a[i],a[i+1]};
    sort(x);
    if(x[1]==a[i])ans++;
  }
  cout<ans<<endl;
 return 0;
}


  

Compiler output:
a.cc: In function 'int main()':
a.cc:20:24: error: request for member 'begin' in 'x', which is of non-class type 'int [3]'
   20 | #define sort(s) sort(s.begin(),s.end())
      |                        ^~~~~
a.cc:219:5: note: in expansion of macro 'sort'
  219 |     sort(x);
      |     ^~~~
a.cc:20:34: error: request for member 'end' in 'x', which is of non-class type 'int [3]'
   20 | #define sort(s) sort(s.begin(),s.end())
      |                                  ^~~
a.cc:219:5: note: in expansion of macro 'sort'
  219 |     sort(x);
      |     ^~~~
a.cc:222:11: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
  222 |   cout<ans<<endl;
      |        ~~~^~~~~~