criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include<iostream>
using namespace std;

int main(){
  int i,j,k;
  int 64_t N;
  int 64_t a[N];
  int count=0;
  cin>>N>>a[N];
  
  for(i=0;i<N-1;i=i+k+2){
    k=0;
  	if(a[i]-a[i+1]<=0){
      count++;
      for(j=i+1;j<N;j++){
		if(a[j]-a[j+1]<=0){
        k++;}
        else if(a[j]-a[j+1]>0){
          break;}
      }}
     else if(a[i]-a[i+1]>=0){
       count++;
		for(j=i+1;j<N;j++){
		if(a[j]-a[j+1]>=0){
        k++;}
        else if(a[j]-a[j+1]<0){
          break;}
      }}  
  }
  if(count==0){
    count++;}
cout<<count<<endl;
}
          

Compiler output:
a.cc: In function 'int main()':
a.cc:6:7: error: expected unqualified-id before numeric constant
    6 |   int 64_t N;
      |       ^~~~
a.cc:7:7: error: expected unqualified-id before numeric constant
    7 |   int 64_t a[N];
      |       ^~~~
a.cc:9:8: error: 'N' was not declared in this scope
    9 |   cin>>N>>a[N];
      |        ^
a.cc:9:11: error: 'a' was not declared in this scope
    9 |   cin>>N>>a[N];
      |           ^
Language: C++

#include<iostream>
using namespace std;

int main(){
  int 64_t N,i,j,k;
  int 64_t a[N];
  int count=0;
  cin>>N>>a[N];
  
  for(i=0;i<N-1;i=i+k+2){
    k=0;
  	if(a[i]-a[i+1]<=0){
      count++;
      for(j=i+1;j<N;j++){
		if(a[j]-a[j+1]<=0){
        k++;}
        else if(a[j]-a[j+1]>0){
          break;}
      }}
     else if(a[i]-a[i+1]>=0){
       count++;
		for(j=i+1;j<N;j++){
		if(a[j]-a[j+1]>=0){
        k++;}
        else if(a[j]-a[j+1]<0){
          break;}
      }}  
  }
  if(count==0){
    count++;}
cout<<count<<endl;
}
          

Compiler output:
a.cc: In function 'int main()':
a.cc:5:7: error: expected unqualified-id before numeric constant
    5 |   int 64_t N,i,j,k;
      |       ^~~~
a.cc:6:7: error: expected unqualified-id before numeric constant
    6 |   int 64_t a[N];
      |       ^~~~
a.cc:8:8: error: 'N' was not declared in this scope
    8 |   cin>>N>>a[N];
      |        ^
a.cc:8:11: error: 'a' was not declared in this scope
    8 |   cin>>N>>a[N];
      |           ^
a.cc:10:7: error: 'i' was not declared in this scope
   10 |   for(i=0;i<N-1;i=i+k+2){
      |       ^
a.cc:10:21: error: 'k' was not declared in this scope
   10 |   for(i=0;i<N-1;i=i+k+2){
      |                     ^
a.cc:14:11: error: 'j' was not declared in this scope
   14 |       for(j=i+1;j<N;j++){
      |           ^
a.cc:22:21: error: 'j' was not declared in this scope
   22 |                 for(j=i+1;j<N;j++){
      |                     ^
Language: C++

#include<iostream>
using namespace std;

int main(){
  int N,i,j,k;
  int a[N]
  int count=0;
  cin>>N>>a[N];
  
  for(i=0;i<N-1;i+k+2){
    k=0;
  	if(a[i]-a[i+1]<=0){
      for(j=i+1;j<N-1;j++){
		if(a[j]-a[j+1]<=0){
        k++;}
        else{
          count++;
          break;}
      }}
     else if(a[i]-a[i+1]>=0){
		for(j=i+1;j<N-1;j++){
		if(a[j]-a[j+1]>=0){
        k++;}
        else{
          count++;
          break;}
      }}  
  }
  if(count==0){
    count++;}
cout<<count<<endl;
}
          

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: expected initializer before 'int'
    7 |   int count=0;
      |   ^~~
a.cc:8:11: error: 'a' was not declared in this scope
    8 |   cin>>N>>a[N];
      |           ^
a.cc:17:11: error: 'count' was not declared in this scope
   17 |           count++;
      |           ^~~~~
a.cc:25:11: error: 'count' was not declared in this scope
   25 |           count++;
      |           ^~~~~
a.cc:29:6: error: 'count' was not declared in this scope
   29 |   if(count==0){
      |      ^~~~~
a.cc:31:7: error: 'count' was not declared in this scope
   31 | cout<<count<<endl;
      |       ^~~~~
Language: C++

#include<iostream>
using namespace std;

int main(){
  int N,i,j,k;
  int a[N]
  int count;
  cin>>N>>a[];
  
  for(i=0;i<N-1;i+k+2){
    k=0;
  	if(a[i]-a[i+1]<=0){
      for(j=i+1;j<N-1;j++){
		if(a[j]-a[j+1]<=0){
        k++;}
        else{
          count++;
          break;}
      }}
     else if(a[i]-a[i+1]>=0){
		for(j=i+1;j<N-1;j++){
		if(a[j]-a[j+1]>=0){
        k++;}
        else{
          count++;
          break;}
      }}  
  }
  if(count==0){
    count++;}
cout<<count<<endl;
}
          

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: expected initializer before 'int'
    7 |   int count;
      |   ^~~
a.cc:8:11: error: 'a' was not declared in this scope
    8 |   cin>>N>>a[];
      |           ^
a.cc:8:13: error: expected primary-expression before ']' token
    8 |   cin>>N>>a[];
      |             ^
a.cc:17:11: error: 'count' was not declared in this scope
   17 |           count++;
      |           ^~~~~
a.cc:25:11: error: 'count' was not declared in this scope
   25 |           count++;
      |           ^~~~~
a.cc:29:6: error: 'count' was not declared in this scope
   29 |   if(count==0){
      |      ^~~~~
a.cc:31:7: error: 'count' was not declared in this scope
   31 | cout<<count<<endl;
      |       ^~~~~
Language: C++

#include<iostream>
using namespace std;

int main(){
  int a[N],N,i,j,k;
  int count;
  cin>>N>>a[];
  
  for(i=0;i<N-1;i+k+2){
    k=0;
  	if(a[i]-a[i+1]<=0){
      for(j=i+1;j<N-1;j++){
		if(a[j]-a[j+1]<=0){
        k++;}
        else{
          count++;
          break;}
      }}
     else if(a[i]-a[i+1]>=0){
		for(j=i+1;j<N-1;j++){
		if(a[j]-a[j+1]>=0){
        k++;}
        else{
          count++;
          break;}
      }}  
  }
  if(count==0){
    count++;}
cout<<count<<endl;
}
          

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'N' was not declared in this scope
    5 |   int a[N],N,i,j,k;
      |         ^
a.cc:7:11: error: 'a' was not declared in this scope
    7 |   cin>>N>>a[];
      |           ^
a.cc:7:13: error: expected primary-expression before ']' token
    7 |   cin>>N>>a[];
      |             ^
Language: C++

#include<iostream>
using namespace std;

int main(){
  int a[],N,i,j,k;
  int count;
  cin>>N>>a[];
  
  for(i=0;i<N-1;i+k+2){
    k=0;
  	if(a[i]-a[i+1]<=0){
      for(j=i+1;j<N-1;j++){
		if(a[j]-a[j+1]<=0){
        k++;}
        else{
          count++;
          break;}
      }}
     else if(a[i]-a[i+1]>=0){
		for(j=i+1;j<N-1;j++){
		if(a[j]-a[j+1]>=0){
        k++;}
        else{
          count++;
          break;}
      }}  
  }
  if(count==0){
    count++;}
cout<<count<<endl;
}
          

Compiler output:
a.cc: In function 'int main()':
a.cc:5:7: error: storage size of 'a' isn't known
    5 |   int a[],N,i,j,k;
      |       ^
a.cc:7:13: error: expected primary-expression before ']' token
    7 |   cin>>N>>a[];
      |             ^
Language: C++

#include <vector>
using namespace std;

int main() {
    int N; cin >> N;
    vector<int> A(N);
    for (int i = 0; i < N; ++i) cin>>A[i];

    int res = 0;
    for (int i = 0; i < N; ++i) {
      
        while (i+1 < N && A[i] == A[i+1]) ++i;

       
        if (i+1 < N && A[i] < A[i+1]) {
            while (i+1 < N && A[i] <= A[i+1]) ++i;
        }
        else if (i+1 < N && A[i] > A[i+1]) {
            while (i+1 < N && A[i] >= A[i+1]) ++i;
        }
        ++res;
    }
    cout<<res<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:12: error: 'cin' was not declared in this scope
    5 |     int N; cin >> N;
      |            ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <vector>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:23:5: error: 'cout' was not declared in this scope
   23 |     cout<<res<<endl;
      |     ^~~~
a.cc:23:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:23:16: error: 'endl' was not declared in this scope
   23 |     cout<<res<<endl;
      |                ^~~~
a.cc:2:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    1 | #include <vector>
  +++ |+#include <ostream>
    2 | using namespace std;
Language: C++

#include <vector>
using namespace std;

int main() {
    int N; cin >> N;
    vector<int> A(N);
    for (int i = 0; i < N; ++i) cin >> A[i];

    int res = 0;
    for (int i = 0; i < N; ++i) {
        // same を抜ける
        while (i+1 < N && A[i] == A[i+1]) ++i;

        // up
        if (i+1 < N && A[i] < A[i+1]) {
            while (i+1 < N && A[i] <= A[i+1]) ++i;
        }
        // down
        else if (i+1 < N && A[i] > A[i+1]) {
            while (i+1 < N && A[i] >= A[i+1]) ++i;
        }
        ++res;
    }
    cout << res << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:12: error: 'cin' was not declared in this scope
    5 |     int N; cin >> N;
      |            ^~~
a.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    1 | #include <vector>
  +++ |+#include <iostream>
    2 | using namespace std;
a.cc:24:5: error: 'cout' was not declared in this scope
   24 |     cout << res << endl;
      |     ^~~~
a.cc:24:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:24:20: error: 'endl' was not declared in this scope
   24 |     cout << res << endl;
      |                    ^~~~
a.cc:2:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    1 | #include <vector>
  +++ |+#include <ostream>
    2 | using namespace std;
Language: C++

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

int main() {
  
  int N;
  int A[N];
  for (int i = 0; i < N; i++) cin >> A[i];
  
  int ans = 0;
  
  for (int i = 0; i < N; i++){
    while (i+1 <= N; && A[i] == A[i+1]) i++;
    
    if (A[i] > A[i+1]) {
      while (A[i] >= A[i+1]) i++;
    } else if (A[i] < A[i+1]) {
      while (A[i] <= A[i+1]) i++;
    }
    ans++;
  }
  cout << ans << endl;   
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:20: error: expected ')' before ';' token
   13 |     while (i+1 <= N; && A[i] == A[i+1]) i++;
      |           ~        ^
      |                    )
a.cc:13:26: error: expected ';' before '[' token
   13 |     while (i+1 <= N; && A[i] == A[i+1]) i++;
      |                          ^
      |                          ;
a.cc:13:25: error: label 'A' used but not defined
   13 |     while (i+1 <= N; && A[i] == A[i+1]) i++;
      |                         ^
Language: C

// 161-C Replacing Integer

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <math.h>
#include <assert.h>
#include <string.h>
#include <memory.h>
#include <malloc.h>
#include <stdlib.h>

// qsortで用いる比較用関数．*a<*bならaが先になる．
int compare(const void* a, const void* b) {
    return -1 * (*(int*)a - *(int*)b);
}


int main() {
    int n,i,cnt=1,diff;
    int* a;
    bool isReset = false;

    scanf("%d", &n);
    if (n == 1) {
        printf("1");
        return 0;
    }

    a = (int*)malloc(sizeof(int) * n);
    for (i = 0; i < n - 1; i++) {
        scanf("%d", &a[i]);
    }

    diff = a[i] - a[i + 1];

    for (i = 1; i < n - 1; i++) {

        if (diff == 0 && a[i] == a[i + 1]) continue;

        if (!(isReset)) {
            if (diff < 0 && a[i] > a[i + 1]) { // 一つ前のiについて，a[i] < a[i+1]
                cnt++;
                isReset = true;
            }

            if (diff > 0 && a[i] < a[i + 1]) {
                cnt++;
                isReset = true;
            }
            
        }
        else {
            isReset = false;
        }
        diff = a[i] - a[i + 1];
    }


    printf("%d", cnt);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:21:5: error: unknown type name 'bool'
   21 |     bool isReset = false;
      |     ^~~~
main.c:11:1: note: 'bool' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
   10 | #include <stdlib.h>
  +++ |+#include <stdbool.h>
   11 | 
main.c:21:20: error: 'false' undeclared (first use in this function)
   21 |     bool isReset = false;
      |                    ^~~~~
main.c:21:20: note: 'false' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
main.c:21:20: note: each undeclared identifier is reported only once for each function it appears in
main.c:43:27: error: 'true' undeclared (first use in this function)
   43 |                 isReset = true;
      |                           ^~~~
main.c:43:27: note: 'true' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
Language: C

// 161-C Replacing Integer

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <math.h>
#include <assert.h>
#include <string.h>
#include <memory.h>
#include <malloc.h>
#include <stdlib.h>

// qsortで用いる比較用関数．*a<*bならaが先になる．
int compare(const void* a, const void* b) {
    return -1 * (*(int*)a - *(int*)b);
}


int main() {
    int n,i,cnt=1,diff;
    int* a;
    bool isReset = false;

    scanf("%d", &n);
    if (n == 1) {
        printf("1");
        return 0;
    }

    int a[n];
    for (i = 0; i < n - 1; i++) {
        scanf("%d", &a[i]);
    }

    diff = a[i] - a[i + 1];

    for (i = 1; i < n - 1; i++) {

        if (diff == 0 && a[i] == a[i + 1]) continue;

        if (!(isReset)) {
            if (diff < 0 && a[i] > a[i + 1]) { // 一つ前のiについて，a[i] < a[i+1]
                cnt++;
                isReset = true;
            }

            if (diff > 0 && a[i] < a[i + 1]) {
                cnt++;
                isReset = true;
            }
            
        }
        else {
            isReset = false;
        }
        diff = a[i] - a[i + 1];
    }


    printf("%d", cnt);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:21:5: error: unknown type name 'bool'
   21 |     bool isReset = false;
      |     ^~~~
main.c:11:1: note: 'bool' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
   10 | #include <stdlib.h>
  +++ |+#include <stdbool.h>
   11 | 
main.c:21:20: error: 'false' undeclared (first use in this function)
   21 |     bool isReset = false;
      |                    ^~~~~
main.c:21:20: note: 'false' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
main.c:21:20: note: each undeclared identifier is reported only once for each function it appears in
main.c:29:9: error: conflicting types for 'a'; have 'int[n]'
   29 |     int a[n];
      |         ^
main.c:20:10: note: previous declaration of 'a' with type 'int *'
   20 |     int* a;
      |          ^
main.c:43:27: error: 'true' undeclared (first use in this function)
   43 |                 isReset = true;
      |                           ^~~~
main.c:43:27: note: 'true' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
Language: C

// 161-C Replacing Integer

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <math.h>
#include <assert.h>
#include <string.h>
#include <memory.h>
#include <malloc.h>
#include <stdlib.h>

int main() {
    int n,i,cnt=1,diff;
    int* a;
    bool isReset = false;

    scanf("%d", &n);
    if (n == 1) {
        printf("1");
        return 0;
    }

    a = (int*)malloc(sizeof(int) * n);
    for (i = 0; i < n - 1; i++) {
        scanf("%d", &a[i]);
    }

    diff = a[i] - a[i + 1];

    for (i = 1; i < n - 1; i++) {

        if (diff == 0 && a[i] == a[i + 1]) continue;

        if (!(isReset)) {
            if (diff < 0 && a[i] > a[i + 1]) { // 一つ前のiについて，a[i] < a[i+1]
                cnt++;
                isReset = true;
            }

            if (diff > 0 && a[i] < a[i + 1]) {
                cnt++;
                isReset = true;
            }
            
        }
        else {
            isReset = false;
        }
        diff = a[i] - a[i + 1];
    }


    printf("%d", cnt);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:15:5: error: unknown type name 'bool'
   15 |     bool isReset = false;
      |     ^~~~
main.c:11:1: note: 'bool' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
   10 | #include <stdlib.h>
  +++ |+#include <stdbool.h>
   11 | 
main.c:15:20: error: 'false' undeclared (first use in this function)
   15 |     bool isReset = false;
      |                    ^~~~~
main.c:15:20: note: 'false' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
main.c:15:20: note: each undeclared identifier is reported only once for each function it appears in
main.c:37:27: error: 'true' undeclared (first use in this function)
   37 |                 isReset = true;
      |                           ^~~~
main.c:37:27: note: 'true' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
Language: C

// 161-C Replacing Integer

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <math.h>
#include <assert.h>
#include <string.h>
#include <memory.h>
#include <malloc.h>
#include <stdlib.h>

// qsortで用いる比較用関数．*a<*bならaが先になる．
int compare(const void* a, const void* b) {
    return -1 * (*(int*)a - *(int*)b);
}


int main() {
    int n,i,cnt=1,step,diff;
    int* a;
    bool isReset = false;

    scanf("%d", &n);
    if (n == 1) {
        printf("1");
        return 0;
    }

    a = (int*)malloc(sizeof(int) * n);
    for (i = 0; i < n - 1; i++) {
        scanf("%d", &a[i]);
    }

    diff = a[i] - a[i + 1];

    for (i = 1; i < n - 1; i++) {
        if (diff == 0 && a[i] == a[i + 1]) continue;
        if (isReset == false) {
            if (diff < 0 && a[i] > a[i + 1]) { // 一つ前のiについて，a[i] < a[i+1]
                cnt++;
                isReset = true;
            }

            if (diff > 0 && a[i] < a[i + 1]) {
                cnt++;
                isReset = true;
            }
            
        }
        else {
            isReset = false;
        }
        diff = a[i] - a[i + 1];
    }


    printf("%d", cnt);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:21:5: error: unknown type name 'bool'
   21 |     bool isReset = false;
      |     ^~~~
main.c:11:1: note: 'bool' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
   10 | #include <stdlib.h>
  +++ |+#include <stdbool.h>
   11 | 
main.c:21:20: error: 'false' undeclared (first use in this function)
   21 |     bool isReset = false;
      |                    ^~~~~
main.c:21:20: note: 'false' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
main.c:21:20: note: each undeclared identifier is reported only once for each function it appears in
main.c:41:27: error: 'true' undeclared (first use in this function)
   41 |                 isReset = true;
      |                           ^~~~
main.c:41:27: note: 'true' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
Language: C++

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

int N, L, T;
float X[110000];
int W[110000];

int main () {
  cin >> N >> L >> T;
  for (int i = 1; i < N + 1; i++) cin >> X[i] >> W[i];
  
  for (float t = 0.5; t <= T; t += 0.5) {
    //t秒のときの位置へ移動
    for (int i = 1; i < N + 1; i++) {
      if (W[i] == 1) {
        X[i] += 0.5;
      } else {
        X[i] -= 0.5;
      }
      //円の始点終点調整
      if (X[i] == L) {
        X[i] = 0;
      } else if (X[i] < 0) {
        X[i] = (float)L - 0.5;
      }
    }
    //衝突判定
    for (int i = 1; i < N; i++) {
      if (X[i] == X[i + 1]) {
        W[i] = 2;
        W[i + 1] = 1;
      }
    }
    if (X[1] == X[N]) {
      W[1] = 1;
      W[N] = 2;
    }
  }
  
  //出力
  for (int i = 1; i < N + 1; i++) {
    cout << (int)X[i]
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:42:22: error: expected ';' before '}' token
   42 |     cout << (int)X[i]
      |                      ^
      |                      ;
   43 |   }
      |   ~
Language: C++

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

int main() {
    int N;
    cin >> N;
    vector<int> A(N);
    vector<int> B(N-1);
    
    for (int i = 0; i < N; i++){
        cin >> A.at(i);
    }
    
    for (int i = 0; i < N-1; i++){
        B.at(i) = A.at(i+1) - A.at(i);
    }
    
    queue<int> q;
    
    for (int i = 0; i < N-1; i++){
        if (B.at(i)!=0){
            q.push(B.at(i));
        }
    }
    
    int M = q.size();
    vector<int> C(M);
    vector<int> D(M-1);
    
    for (int i = 0; i < M; i++){
        C.at(i) = q.front();
        q.pop();
    }
    
    int count = 1;
    
    for (int i = 0; i < M;){
        D.at(i)=C.at(i)*C.at(i+1);
        if (D.at(1)<0){
            count++;
        }
    }
    
    cout << count << endl;
    

Compiler output:
a.cc: In function 'int main()':
a.cc:44:27: error: expected '}' at end of input
   44 |     cout << count << endl;
      |                           ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int N,S=0;cin>>N;int A[N];
  for(int i=0;i<N;i++)cin>>A[i];
  for(int i=1;i<N;i++){
    int j=i;
    while((T.at(i-1)-T.at(i))*(T.at(j-1)-T.at(j))>=0)j++;
    i=j-1;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: 'T' was not declared in this scope
    8 |     while((T.at(i-1)-T.at(i))*(T.at(j-1)-T.at(j))>=0)j++;
      |            ^
Language: C++

//#include <tourist>
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> p;
const int INF = 1e9;
const ll LINF = ll(1e18) + 1;
const int MOD = 1000000007;
const int dx[4] = {0, 1, 0, -1}, dy[4] = {-1, 0, 1, 0};
const int Dx[8] = {0, 1, 1, 1, 0, -1, -1, -1}, Dy[8] = {-1, -1, 0, 1, 1, 1, 0, -1};
#define yes cout << "Yes" << endl
#define YES cout << "YES" << endl
#define no cout << "No" << endl
#define NO cout << "NO" << endl
#define rep(i, n) for (int i = 0; i < n; i++)
#define ALL(v) v.begin(), v.end()
#define debug(v)          \
    cout << #v << ":";    \
    for (auto x : v)      \
    {                     \
        cout << x << ' '; \
    }                     \
    cout << endl;
template <class T>
bool chmax(T &a, const T &b)
{
    if (a < b)
    {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
bool chmin(T &a, const T &b)
{
    if (b < a)
    {
        a = b;
        return 1;
    }
    return 0;
}
//cout<<fixed<<setprecision(15);有効数字15桁
//-std=c++14
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }
int n, m;
vector<ll> a;
int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        ll temp;
        cin >> temp;
        a.push_back(temp);
    }
    if(n==1)return cout<<1<<"\n",0;
    ll ans=0;
    int i=0;
    while(i<=n-1){
        int count=0;
        while(a[i]>=a[i+1]){
            i++;
            count++;
            if(i>=n-1)break;
        }
        if(count){ans++;i++;};
        count=0;
        if(i>=n-1)break;
        while(a[i]<=a[i+1]){
            i++;
            count++;
            if(i>=n-1)break;
        }
        if(count){ans++;i++;};
        //cout<<i<<" "<<ans<<"\n";
    }
    reverse(ALL(a));
    ll ans1=0;
    int i=0;
    while(i<=n-1){
        int count=0;
        while(a[i]>=a[i+1]){
            i++;
            count++;
            if(i>=n-1)break;
        }
        if(count){ans1++;i++;};
        count=0;
        if(i>=n-1)break;
        while(a[i]<=a[i+1]){
            i++;
            count++;
            if(i>=n-1)break;
        }
        if(count){an1s++;i++;};
        //cout<<i<<" "<<ans<<"\n";
    }
    cout<<min(ans,ans1)<<"\n";
}


Compiler output:
a.cc: In function 'int main()':
a.cc:84:9: error: redeclaration of 'int i'
   84 |     int i=0;
      |         ^
a.cc:63:9: note: 'int i' previously declared here
   63 |     int i=0;
      |         ^
a.cc:100:19: error: 'an1s' was not declared in this scope; did you mean 'ans1'?
  100 |         if(count){an1s++;i++;};
      |                   ^~~~
      |                   ans1
Language: C++

{
    //ifstream in("subtask_1_02.txt");
    //cin.rdbuf(in.rdbuf());
    cin >> N;
    for (int i = 0; i < N; i++) cin >> A[i];
    int counter = 0;
    for (int i = 0; i < N; i++){
        while (i+1 < N && A[i] == A[i+1]) i++;

        if (i+1 < N && A[i] < A[i+1]){
            while (i+1 < N && A[i] <= A[i+1]) i++;
        }

        else if (i+1 < N && A[i] > A[i+1]){
            while (i+1 < N && A[i] >= A[i+1]) i++;
        }

        counter++;
    }
    cout << fixed << setprecision(10) << counter << endl;
}

Compiler output:
a.cc:1:1: error: expected unqualified-id before '{' token
    1 | {
      | ^
Language: C

(f+=NR~2||p>$1)*(t+=p<p=$1){f=t=!++s}{RS=FS}/\n/,$1=s

Compiler output:
main.c:1:3: error: expected ')' before '+=' token
    1 | (f+=NR~2||p>$1)*(t+=p<p=$1){f=t=!++s}{RS=FS}/\n/,$1=s
      |   ^~
      |   )
main.c:1:38: error: expected identifier or '(' before '{' token
    1 | (f+=NR~2||p>$1)*(t+=p<p=$1){f=t=!++s}{RS=FS}/\n/,$1=s
      |                                      ^
main.c:1:45: error: expected identifier or '(' before '/' token
    1 | (f+=NR~2||p>$1)*(t+=p<p=$1){f=t=!++s}{RS=FS}/\n/,$1=s
      |                                             ^
main.c:1:46: error: stray '\' in program
    1 | (f+=NR~2||p>$1)*(t+=p<p=$1){f=t=!++s}{RS=FS}/\n/,$1=s
      |                                              ^
Language: C++

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

int sign(long long int num) {
  if (num<0) {
    return -1;
  }
  else if(num > 0) {
    return 1;
  }
  else {
    return 0;
  }
}

int main() {
  long long int n;
  cin >> n;
  vector<long long int> list(n);
  for (long long int i=0;i<n;i++) {
    cin >> list.at(i);
  }
  long long int count=1;
  long long int len=0;
  for (long long int i=0;i<n-1;i++) {
    len++;
    //cout << len << endl;
    if (len == 1) {
      int judge = 0;
    }
    else {
      //cout << i << endl;
      if(judge==0) {
        judege = sign(list.at(i)-list.at(i-1));
      }
      if ( judge * sign(list.at(i+1)-list.at(i)) < 0 ) {
        count++;
        len=0;
      }
    }
  }
  cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:10: error: 'judge' was not declared in this scope
   33 |       if(judge==0) {
      |          ^~~~~
a.cc:34:9: error: 'judege' was not declared in this scope
   34 |         judege = sign(list.at(i)-list.at(i-1));
      |         ^~~~~~
a.cc:36:12: error: 'judge' was not declared in this scope
   36 |       if ( judge * sign(list.at(i+1)-list.at(i)) < 0 ) {
      |            ^~~~~
Language: C++

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

int main() {
  long long int n;
  cin >> n;
  vector<long long int> list(n);
  for (long long int i=0;i<n;i++) {
    cin >> list.at(i);
  }
  long long int count=1;
  long long int len=0;
  for (long long int i=0;i<n-1;i++) {
    len++;
    //cout << len << endl;
    if (len != 1) {
      //cout << i << endl;
      if ( signal(list.at(i)-list.at(i-1)) * signal(list.at(i+1)-list.at(i)) < 0 ) {
        count++;
        len=0;
      }
    }
  }
  cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:18: error: too few arguments to function 'void (* signal(int, __sighandler_t))(int)'
   18 |       if ( signal(list.at(i)-list.at(i-1)) * signal(list.at(i+1)-list.at(i)) < 0 ) {
      |            ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/csignal:42,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:116,
                 from a.cc:1:
/usr/include/signal.h:88:23: note: declared here
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                       ^~~~~~
a.cc:18:52: error: too few arguments to function 'void (* signal(int, __sighandler_t))(int)'
   18 |       if ( signal(list.at(i)-list.at(i-1)) * signal(list.at(i+1)-list.at(i)) < 0 ) {
      |                                              ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/signal.h:88:23: note: declared here
   88 | extern __sighandler_t signal (int __sig, __sighandler_t __handler)
      |                       ^~~~~~
Language: C++

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

int main() {
  long long int n;
  cin >> n;
  vector<long long int> list(n);
  for (long long int i=0;i<n;i++) {
    cin >> list.at(i);
  }
  long long int count=1;
  long long int len=0;
  for (long long int i=0;i<n-1;i++) {
    len++;
    //cout << len << endl;
    if (len != 1) {
      //cout << i << endl;
      if ( sign(list.at(i)-list.at(i-1)) * sign(list.at(i+1)-list.at(i)) < 0 ) {
        count++;
        len=0;
      }
    }
  }
  cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:12: error: 'sign' was not declared in this scope; did you mean 'sin'?
   18 |       if ( sign(list.at(i)-list.at(i-1)) * sign(list.at(i+1)-list.at(i)) < 0 ) {
      |            ^~~~
      |            sin
Language: C++

//code by lynmisakura.wish to be accepted!
#include <iostream>
#include <limits.h>
#include <algorithm>
#include <bitset>
#include <cctype>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <numeric>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <utility>
#include <vector>
#include <queue>
#include <unordered_map>
#include <unordered_set>

/***************************/
using namespace std;

typedef long long ll;
typedef vector<ll> vi;
typedef vector<long long> vl;
typedef pair<ll, ll> pi;
typedef vector<pair<ll, ll>> vpi;

//const long long INF = 1LL << 55;

#define itn ll
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define ss second
#define ff first
#define dup(x,y) ((x) + (y) - 1)/(y)
#define mins(x,y) x = min(x,y)
#define maxs(x,y) x = max(x,y)
#define all(x) (x).begin(),(x).end()
#define Rep(n) for(ll i = 0;i < n;i++)
#define rep(i,n) for(ll i = 0;i < n;i++)
#define flush fflush(stdout)
#define rrep(i,n) for(ll i = n - 1;i >= 0;i--)
#define UNIQUE(v) v.erase( unique(v.begin(), v.end()), v.end() )
#define ioboost cin.tie(0);ios::sync_with_stdio(false);cout<<fixed<<setprecision(20)
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll qp(ll a, ll b) { ll ans = 1; do { if (b & 1)ans = 1ll * ans*a; a = 1ll * a*a; } while (b >>= 1); return ans; }
ll qp(ll a, ll b, ll mo) { ll ans = 1; do { if (b & 1)ans = 1ll * ans*a%mo; a = 1ll * a*a%mo; } while (b >>= 1); return ans; }

#define _GLIBCXX_DEBUG
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl

class ASortedArrays {
public:
    static constexpr int kStressIterations = 0;
    static void generateTest(std::ostream& test) {
    }

    void solve(std::istream& cin, std::ostream& cout) {
        int n;cin >> n;
        vector<int> a(n);
        for (int i = 0; i < n; ++i) {
            cin >> a[i];
        }
        
        int inc;//増加中：１、減少中：−１、不明：０
        int ans = 1;
        if(a[0] < a[1])inc = 1;
        else if(a[0] == a[1])inc = 0;
        else inc = -1;
        
        for(int i = 1;i < n;i++){
            if(a[i] == a[i-1])continue; //前の要素と同じならそこで区切る必要は絶対にない
            if(inc == 0){
                if(a[i] > a[i-1])inc = 1;
                else inc = -1;
            }else{
                if(inc == 1 and a[i] < a[i-1])ans++,inc = 0;
                else if(inc == -1 and a[i] > a[i-1])ans++,inc = 0;
            }
        }
        cout << ans<< endl;
    }
};

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
typedef long long ll;

int main(){
    ll n;
    cin >> n;

    int flag=0;    //0:なし, 1:減少, 2:増加
    ll preNum, cnt=1,;
    cin >> preNum;

    for(int i=1; i<n; i++){
        ll Num;
        cin >> Num;
        if(Num == preNum) break;
        if(flag==0){
            if(preNum < Num){
                flag = 2;
            }else{
                flag = 1;
            }
        }else if(flag == 1){
            if(preNum < Num){
                flag = 0;
                cnt++;
            }
        }else{
            if(preNum > Num){
                flag = 0;
                cnt++;
            }
        }
        preNum = Num;
    }

    cout << cnt << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:22: error: expected unqualified-id before ';' token
   13 |     ll preNum, cnt=1,;
      |                      ^
Language: C++

#include<bits/stdc++.h>
#include<iostream>

using namespace std;

template <class T> using V = vector<T>;

using ll = long long;
using ch char;
using vch = V<ch>;

#define FOR(i,a,b) for(ll i=(a);i<(b);i++)

void Solve();

signed main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout<<setprecision(20)<<fixed;
  Solve();
}


/****************************************\
| Thank you for viewing my code:)        |
| Written by RedSpica a.k.a. RanseMirage |
| Twitter:@asakaakasaka                  | 
\****************************************/

void Solve(){
  ll n;
    cin>>n;
  vll V(n);
  ll past=0;
  vch s(0);
  FOR(i,0,n){
    ll now;
      cin>>now;
    if(i>0){
      if(past<now){
        s.push_back('<');
      }
      else if(past>now){
        s.push_back('>');
      }
    }
    past=now;
  }

  ll a=s.size();
  ll ans=1;

  FOR(i,0,a-1){
    if(s[i]!=s[i+1]){
      ans++;
      i++;
    }
  }
  cout<<ans<<endl;
}

Compiler output:
a.cc:9:7: error: expected nested-name-specifier before 'ch'
    9 | using ch char;
      |       ^~
a.cc:10:15: error: 'ch' was not declared in this scope
   10 | using vch = V<ch>;
      |               ^~
a.cc:10:17: error: template argument 1 is invalid
   10 | using vch = V<ch>;
      |                 ^
a.cc: In function 'void Solve()':
a.cc:33:3: error: 'vll' was not declared in this scope; did you mean 'll'?
   33 |   vll V(n);
      |   ^~~
      |   ll
a.cc:35:3: error: 'vch' was not declared in this scope
   35 |   vch s(0);
      |   ^~~
a.cc:41:9: error: 's' was not declared in this scope
   41 |         s.push_back('<');
      |         ^
a.cc:44:9: error: 's' was not declared in this scope
   44 |         s.push_back('>');
      |         ^
a.cc:50:8: error: 's' was not declared in this scope
   50 |   ll a=s.size();
      |        ^
Language: C++

#include<bits/stdc++.h>
#include<iostream>

using namespace std;

template <class T> using V = vector<T>;

using ll = long long;
using vch = V<ch>;

#define FOR(i,a,b) for(ll i=(a);i<(b);i++)

void Solve();

signed main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout<<setprecision(20)<<fixed;
  Solve();
}


/****************************************\
| Thank you for viewing my code:)        |
| Written by RedSpica a.k.a. RanseMirage |
| Twitter:@asakaakasaka                  | 
\****************************************/

void Solve(){
  ll n;
    cin>>n;
  vll V(n);
  ll past=0;
  vch s(0);
  FOR(i,0,n){
    ll now;
      cin>>now;
    if(i>0){
      if(past<now){
        s.push_back('<');
      }
      else if(past>now){
        s.push_back('>');
      }
    }
    past=now;
  }

  ll a=s.size();
  ll ans=1;

  FOR(i,0,a-1){
    if(s[i]!=s[i+1]){
      ans++;
      i++;
    }
  }
  cout<<ans<<endl;
}

Compiler output:
a.cc:9:15: error: 'ch' was not declared in this scope
    9 | using vch = V<ch>;
      |               ^~
a.cc:9:17: error: template argument 1 is invalid
    9 | using vch = V<ch>;
      |                 ^
a.cc: In function 'void Solve()':
a.cc:32:3: error: 'vll' was not declared in this scope; did you mean 'll'?
   32 |   vll V(n);
      |   ^~~
      |   ll
a.cc:34:3: error: 'vch' was not declared in this scope
   34 |   vch s(0);
      |   ^~~
a.cc:40:9: error: 's' was not declared in this scope
   40 |         s.push_back('<');
      |         ^
a.cc:43:9: error: 's' was not declared in this scope
   43 |         s.push_back('>');
      |         ^
a.cc:49:8: error: 's' was not declared in this scope
   49 |   ll a=s.size();
      |        ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int n, ans;
  cin >> n;
  vector<int>a(n);
  cin >> a.at(0) >> a.at(1);
  bool up=false;
  bool down=false;
  if(a.at(0)>a.at(1))up=true;
  if(a.at(0)<a.at(1))down=true;
  for(int i=2;i<n;i++){
    cin >> a(i);
    if(up&&a.at(i-1)>a.at(i)){
      ans++;
      up=false;down=true;
    }
    if(down&&a.at(i-1)<a.at(i)){
      ans++;
      up=true;down=false;
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:13: error: no match for call to '(std::vector<int>) (int&)'
   13 |     cin >> a(i);
      |            ~^~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int n, ans;
  cin >> n
  vector<int>a(n);
  cin >> a.at(0) >> a.at(1);
  bool up=false;
  bool down=false;
  if(a.at(0)>a.at(1))up=true;
  if(a.at(0)<a.at(1))down=true;
  for(int i=2;i<n;i++){
    cin >> a(i);
    if(up&&a.at(i-1)>a.at(i)){
      ans++;
      up=false;down=true;
    }
    if(down&&a.at(i-1)<a.at(i)){
      ans++;
      up=true;down=false;
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:11: error: expected ';' before 'vector'
    5 |   cin >> n
      |           ^
      |           ;
    6 |   vector<int>a(n);
      |   ~~~~~~   
a.cc:7:10: error: 'a' was not declared in this scope
    7 |   cin >> a.at(0) >> a.at(1);
      |          ^
Language: C++

#include<bits/stdc++.h>
int main(){
  int n, ans;
  cin >> n
  vector<int>a(n);
  cin >> a.at(0) >> a.at(1);
  bool up=false;
  bool down=false;
  if(a.at(0)>a.at(1))up=true;
  if(a.at(0)<a.at(1))down=true;
  for(int i=2;i<n;i++){
    cin >> a(i);
    if(up&&a.at(i-1)>a.at(i)){
      ans++;
      up=false;down=true;
    }
    if(down&&a.at(i-1)<a.at(i)){
      ans++;
      up=true;down=false;
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    4 |   cin >> n
      |   ^~~
      |   std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:6:10: error: 'a' was not declared in this scope
    6 |   cin >> a.at(0) >> a.at(1);
      |          ^
a.cc:22:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   22 |   cout << ans << endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:22:18: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   22 |   cout << ans << endl;
      |                  ^~~~
      |                  std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

include<bits/stdc++.h>
typedef rep(i,n) for(int i=0;i<n;)
int main(){
    int N; cin>>N;
    vector<int> a(n);
    rep(i,N) cin>>a[i];
    int count=0;
    rep(i,n-1){
        if(a[i+1]>=a[i]){
            while(a[i+1]>=a[i]){
                i++; 
                if(i<n || a[i+1]<a[i]){
                    count++;
                }
            }
        }
        else{
            while(a[i+1]<=a[i]){
                i++; 
                if(i<n || a[i+1]>a[i]){
                    count++;
                }
            }
        }
    }
     
    cout << count << endl;
    return 0;
    

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include<bits/stdc++.h>
      | ^~~~~~~
a.cc:2:30: error: 'i' does not name a type
    2 | typedef rep(i,n) for(int i=0;i<n;)
      |                              ^
a.cc:2:34: error: expected unqualified-id before ')' token
    2 | typedef rep(i,n) for(int i=0;i<n;)
      |                                  ^
Language: C++

#include <iostream>

using namespace std;

//https://atcoder.jp/contests/abc001/submissions/5701454

int main(){
    int n;
    cin >> n;
    int a[n];
    for(int i = 0; i < n; ++i)
    {
        cin >> a[i];
    }

    //単調 >0: 増加, <0: 減少, 0:未決定 
    int tan = 0;
    int cnt = 1;

    for(int i = 0; i < n-1; ++i)
    {
        if(tan == 0)
        {
            if(s[i] < s[i+1])tan = 1;
            if(s[i] > s[i+1])tan = -1;
        }
        else if(tan > 0)
        {
            if(s[i] > s[i+1])
            {
                tan = 0;
                ++cnt;
            }
        }
        else if(tan < 0)
        {
            if(s[i] < s[i+1])
            {
                tan = 0;
                ++cnt;
            }
        }
    }

    





    cout << cnt << endl;
}
 

Compiler output:
a.cc: In function 'int main()':
a.cc:24:16: error: 's' was not declared in this scope
   24 |             if(s[i] < s[i+1])tan = 1;
      |                ^
a.cc:25:16: error: 's' was not declared in this scope
   25 |             if(s[i] > s[i+1])tan = -1;
      |                ^
a.cc:29:16: error: 's' was not declared in this scope
   29 |             if(s[i] > s[i+1])
      |                ^
a.cc:37:16: error: 's' was not declared in this scope
   37 |             if(s[i] < s[i+1])
      |                ^
Language: Java

//ABC13_C

/*
8
1000 1000 1 1000 1000 1 3 2 4
*/

import java.util.Scanner;

public class ABC13_C{

	public static void main(String[] args){

		Scanner scan = new Scanner(System.in);

		int N = scan.nextInt();
		scan.nextLine();

		int arr[] = new int[N];

		for (int i=0; i<N; i++) {

			arr[i] = scan.nextInt();

		}

		int flag =0;
		int preflag = 0;
		int count = 1;

		for(int i=1; i<N; i++) {

			if (arr[i] > arr[i-1]) {
				flag = 1;
			}
			else if (arr[i] == arr[i-1]) {
				continue;
			}
			else {
				flag = -1;
			}

			if(i==1) {
				continue;
			}

			if (arr[i-1] > arr[i-2]) {
				preflag = 1;
			}
			else if (arr[i-1] == arr[i-2]) {
				if(preflag == 0) {
					continue;
				}
			}
			else {
				preflag = -1;
			}

			if(!(flag==preflag)) {
				++count;
				preflag=0;
				for( int j= i-1 ; j >=0; j--) {
					arr[j] = arr[i];
				}
				System.out.println("count: " + i);
			}
		}

		System.out.println(count);

	}
}



Compiler output:
Main.java:10: error: class ABC13_C is public, should be declared in a file named ABC13_C.java
public class ABC13_C{
       ^
1 error
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main()
{
    int n, inc, ans1 = 1, ans2 = 1;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        scanf("%d", &a[i]);
    }
    inc = (a[0] <= a[1] ? 1 : 2);
    for (int i = 2; i < n; i++) {
        if (inc == 1) {
            if (a[i-1] <= a[i]) continue;
            else {
                ans1++;
                i++;
                if(i < n) inc = (a[i-1] >= a[i] ? 2 : 1);
            }
        } else {
            if (a[i-1] >= a[i]) continue;
            else {
                ans1++;
                i++;
                if (i < n) inc = (a[i-1] <= a[i] ? 1 : 2);
            }
        }
    }
    reverse(a.begin(), a.end());
    inc = (a[0] <= a[1] ? 1 : 2);
    for (int i = 2; i < n; i++) {
        if (inc == 1) {
            if (a[i-1] <= a[i]) continue;
            else {
                ans2++;
                i++;
                if(i < n) inc = (a[i-1] >= a[i] ? 2 : 1);
            }
        } else {
            if (a[i-1] >= a[i]) continue;
            else {
                ans2++;
                i++;
                if (i < n) inc = (a[i-1] <= a[i] ? 1 : 2);
            }
        }
    }
    cout << min(ans1, ans2)@ << endl;
    return 0;
}

Compiler output:
a.cc:50:28: error: stray '@' in program
   50 |     cout << min(ans1, ans2)@ << endl;
      |                            ^
Language: C++

#include <bits/stdc++.h>
#define rep(i,a) for(int i=0;i<int(a);++i)
#define REP(i,a,b) for(int i=int(a);i<int(b);++i)
#define pb push_back
#define mp make_pair
#define F first
#define S second
using ll = long long;
using itn = int;
using namespace std;
static const long double GRATIO=(long double)(1+sqrt(5))/2;
ll GCD(ll a, ll b){
    return b ? GCD(b, a%b) : a;
}
ll LCM(ll a, ll b){
    return a/GCD(a,b)*b;
}
int main(){
    int N;
    cin>>N;
    int A[100005];
    int cnt=1;
    rep(i,N) cin>>A[i];
    for(int i=1; i<N-1; i++){
        if(A[i-1]<=A[i]&&A[i]>A[i+1]){
            cnt++;
            i++;
        }
        else if(A[i-1]=>A[i]&&A[i]<A[i+1]){
            cnt++;
            i++;
        }
    }
    cout<<cnt<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:29:24: error: expected primary-expression before '>' token
   29 |         else if(A[i-1]=>A[i]&&A[i]<A[i+1]){
      |                        ^
Language: C++

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

int main(){
  int n;
  cin >> n;
  int a[n];
  for(int i= 0; i < n; ++i) cin >> a[i];

  int flag = 0, ans = 0;
  int i = 0;
  while(i < n){
    if(a[i] == a[i+1])i++;
    else if(a[i] < a[i+1]){
      if(flag == 0) {flag = 1; i++;}
      else if (flag == 1) i++;
      else{ans++; i++; flag =0}
    }
    else if (a[i] > a[i+1]){
      if(flag == 0){flag = -1; i++;}
      else if (flag = -1){ i++;}
      else {ans++; i++; flag = 0}
    }
  }
  cout << ans+1 << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:31: error: expected ';' before '}' token
   17 |       else{ans++; i++; flag =0}
      |                               ^
      |                               ;
a.cc:22:33: error: expected ';' before '}' token
   22 |       else {ans++; i++; flag = 0}
      |                                 ^
      |                                 ;
Language: C++

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

int main(){
  int n;
  cin >> n;
  int a[n];
  for(int i= 0; i < n; ++i) cin >> a[i];

  int flag = 0, ans = 0;
  int i = 0;
  while(i < n){
    if(a[i] == a[i+1])i++;
    else if(a[i] < a[i+1]){
      if(flag == 0) {flag = 1; i++;}
      else if (flag == 1) i++;
      else{ans++; i++}
    }
    else if (a[i] > a[i+1]){
      if(flag == 0){flag = -1; i++;}
      else if (flag = -1){ i++;}
      else {ans++; i++;}
    }
  }
  cout << ans+1 << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:22: error: expected ';' before '}' token
   17 |       else{ans++; i++}
      |                      ^
      |                      ;
Language: C++

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

int main(){
  int n;
  cin >> n;
  int a[n];
  for(int i= 0; i < n; ++i) cin >> a[i];

  int flag = 0, ans = 0;
  int i = 0;
  while(i < n){
    if(a[i] == a[i+1])i++;
    else if(a[i] < a[i+1]){
      if(flag == 0) {flag = 1; i++}
      else if (flag == 1) i++;
      else{ans++; i++}
    }
    else if (a[i] > a[i+1]){
      if(flag == 0){flag = -1; i++}
      else if (flag = -1){ i++}
      else {ans++; i++}
    }
  }
  cout << ans+1 << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:35: error: expected ';' before '}' token
   15 |       if(flag == 0) {flag = 1; i++}
      |                                   ^
      |                                   ;
a.cc:17:22: error: expected ';' before '}' token
   17 |       else{ans++; i++}
      |                      ^
      |                      ;
a.cc:20:35: error: expected ';' before '}' token
   20 |       if(flag == 0){flag = -1; i++}
      |                                   ^
      |                                   ;
a.cc:21:31: error: expected ';' before '}' token
   21 |       else if (flag = -1){ i++}
      |                               ^
      |                               ;
a.cc:22:23: error: expected ';' before '}' token
   22 |       else {ans++; i++}
      |                       ^
      |                       ;