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

#include<stdio.h>
int min(int a,int b){
  if(a<=b){
    return a;
  }
  else {
    return b;
  }
}


int main(){
  int N;
  scanf("%d",&N);
  int b[N-1];
  int a[N];
  
  for (int i=0;i<=N-1;i++){
    scanf("%d",&b[i]);
  }
  
  a[0]=b[0];
  
  for (int i=1;i<=n-2;i++){
    a[i]=min(b[i],b[i-1]);
  }
  
  a[N-1]=b[N-2];
  
  int ans=0;
  for (int i=0;i<N;i++){
    ans+=a[i];
  }
  
  printf("%d",ans);
  
  return 0;
}

  

Compiler output:
main.c: In function 'main':
main.c:24:19: error: 'n' undeclared (first use in this function)
   24 |   for (int i=1;i<=n-2;i++){
      |                   ^
main.c:24:19: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

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

int main() {
  int N;
  cin >> N;
  int sum = 0;
  vector<int> B(N - 1);
  vector<int> A(N);
  for (int i = 0; i < N - 1; i++) cin >> B.at(i);
  for (int i = 0; i < N; i++) {
    if (i == 0) {
      A.at(0) = B.at(0);
    }
    else if (i == N-1) {
      A.at(i) = B.at(i-1);
    }
    else {
      A.at(i) = min(B.at(i-1), B.at(i));
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:20:6: error: expected '}' at end of input
   20 |     }
      |      ^
a.cc:11:31: note: to match this '{'
   11 |   for (int i = 0; i < N; i++) {
      |                               ^
a.cc:20:6: error: expected '}' at end of input
   20 |     }
      |      ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using ll = long long;
using namespace std;
using P = pair<int,int>;

int main(){
    int n;
    cin >> n;
    vector<int> b(n - 1);
    rep(i, n - 1) cin >> b[i];
    vector<int > a(n);
    a[0] = b[0]
    for(int i = 1; i <= n - 2; i++){
        a[i] = min(b[i], b[i - 1]);
    }
    a[n - 1] = b[n - 2];
    int ans = 0;
    rep(i, n) ans += a[i];
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:16: error: expected ';' before 'for'
   13 |     a[0] = b[0]
      |                ^
      |                ;
   14 |     for(int i = 1; i <= n - 2; i++){
      |     ~~~         
a.cc:14:20: error: 'i' was not declared in this scope
   14 |     for(int i = 1; i <= n - 2; i++){
      |                    ^
Language: Java

package problem_c.review;

import java.util.Scanner;

public class C140 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int[] A = new int[N];
        int[] B = new int[N];
        for(int i = 0; i < N-1; i++) B[i] = sc.nextInt();
        B[N-1] = Integer.MAX_VALUE;
        A[0] = Math.min(B[0], B[1]);

        for(int i = 0; i < N-1; i++) {
            A[i+1] = Math.min(B[i], B[i+1]);
        }

        int res = 0;
        for(int i = 0; i < N; i++) {
            res += A[i];
        }
        System.out.println(res);
    }
}


Compiler output:
Main.java:5: error: class C140 is public, should be declared in a file named C140.java
public class C140 {
       ^
1 error
Language: Java

import java.util.*;
public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    int a[] =new int[n];
    int b[] =new int[n-1];
    int ans = 0;

    for(int i = 0; i < b.length; ++i){
      b[i] = sc.nextInt();
    }
   
   for(int i=0; i<a.length; ++i){
		    b[i]=a[i];
		}
		a[(n+1)]=b[n];
		for(int i=1; i<a.length; ++i){
		    if(a[i]>b[(i-1)]){
		        a[i]=b[(i-1)];
		    }
		}
    
    
    for(int i = 0; i < a.length; ++i){
      ans = ans + a[i];
    }

    System.out.println(count);
  }
}


Compiler output:
Main.java:30: error: cannot find symbol
    System.out.println(count);
                       ^
  symbol:   variable count
  location: class Main
1 error
Language: Java

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[]a = new int[n];
		for(int i=0; i<a.length; ++i){
		    int[]a = sc.nextInt();
		}
		int[]b = new int[(n+1)];
		for(int i=0; i<(b.length-1); ++i){
		    b[i]=a[i];
		}
		b[(n+1)]=a[n];
		for(int i=1; i<b.length; ++i){
		    if(b[i]>a[(i-1)]){
		        b[i]=a[(i-1)];
		    }
		}
		int ans = 0;
		for(int i=1; i<b.length; ++i){
		    ans = ans + b[i];
		}
		System.out.println(ans);
	}
}


Compiler output:
Main.java:8: error: variable a is already defined in method main(String[])
		    int[]a = sc.nextInt();
		         ^
Main.java:8: error: incompatible types: int cannot be converted to int[]
		    int[]a = sc.nextInt();
		                       ^
2 errors
Language: Java

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int []a = new int[n];
		for(int i=0; i<a.length; ++i){
		    int []a = sc.nextInt();
		}
		int []b = new int[(n+1)];
		for(int i=0; i<(b.length-1); ++i){
		    b[i]=a[i];
		}
		b[(n+1)]=a[n];
		for(int i=1; i<b.length; ++i){
		    if(b[i]>a[(i-1)]){
		        b[i]=a[(i-1)];
		    }
		}
		int ans = 0;
		for(int i=1; i<b.length; ++i){
		    ans = ans + b[i];
		}
		System.out.println(ans);
	}
}

Compiler output:
Main.java:8: error: variable a is already defined in method main(String[])
		    int []a = sc.nextInt();
		          ^
Main.java:8: error: incompatible types: int cannot be converted to int[]
		    int []a = sc.nextInt();
		                        ^
2 errors
Language: Java

import java.util.*;
public class Main {
	public static void main(String[] args){
       Scanner sc = new Scanner(System.in);   
      //取得
	  int N = sc.nextInt();
      int[] B = new int[N-1];
      for(int i=0;i<N-1;i++){
        B[i] = sc.nextInt();
      }
      //Bの中身を変える
      for(int i=0;i<N-2;i++){
        if(B[i]>B[i+1]){
        B[i] = B[i+1];
        }
      }
      //合計
      int sum = B[0];
      int[] A = int[N];
      for(int i=1;i<N;i++){
          A[i]=B[i-1];
          sum+=A[i];
      }
      System.out.println(sum);
    }
}

Compiler output:
Main.java:19: error: ']' expected
      int[] A = int[N];
                    ^
Main.java:19: error: ';' expected
      int[] A = int[N];
                     ^
2 errors
Language: Java

import java.util.*;
public class Main {
	public static void main(String[] args){
       Scanner sc = new Scanner(System.in);   
      //取得
	  int N = sc.nextInt();
      int[] B = new int[N-1];
      for(int i=0;i<N-1;i++){
        B[i] = sc.nextInt();
      }
      //Bの中身を変える
      for(int i=0;i<N-2;i++){
        if(B[i]>B[i+1]){
        B[i] = B[i+1];
        }
      }
      //合計
      int sum = B[0];
      for(int i=1;i<N;i++){
          A[i]=B[i-1];
          sum+=A[i];
      }
      System.out.println(sum);
    }
}

Compiler output:
Main.java:20: error: cannot find symbol
          A[i]=B[i-1];
          ^
  symbol:   variable A
  location: class Main
Main.java:21: error: cannot find symbol
          sum+=A[i];
               ^
  symbol:   variable A
  location: class Main
2 errors
Language: Java

import java.util.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        
        int N = sc.nextInt();
        int a[] = new int [N-1];
        int count =0;
        
        for(int i=0;i<N-1;i++){
            a[i] = sc.nextInt();
        }
        
        
        for(int i=0;i<N-1;i++){
        
            count += Math.min(b[i],b[i+1]);
        
        }
        
        System.out.println(count);
        
        
    }
}


Compiler output:
Main.java:21: error: cannot find symbol
            count += Math.min(b[i],b[i+1]);
                              ^
  symbol:   variable b
  location: class Main
Main.java:21: error: cannot find symbol
            count += Math.min(b[i],b[i+1]);
                                   ^
  symbol:   variable b
  location: class Main
2 errors
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using ll = long long;
using P = pair<string,int>;

int main() {
int n;
cin >> n;
int ans = 0;
vector<int> b(n-1);
vector<int> a(n);
rep(i,n-1) cin >> b.at(i);
a.at(0) = b.at(0);
for (int i = 1; i < n-1; i++) {
  if(b.at(i) <= b.at(i-1)) a.at(i) = b.at(i);
  else a.at(i) = b.at(i-1);
}
int ans = 0;
rep(i,n) ans += a.at(i);
cout << ans << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:5: error: redeclaration of 'int ans'
   19 | int ans = 0;
      |     ^~~
a.cc:10:5: note: 'int ans' previously declared here
   10 | int ans = 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-1 ; i++)
  cin >> a[i] ; 
  
  int sum = a[i] ; 
  
  for(int i = 0 ; i < n-2 ; i++)
    sum += min(a[i] , a[i+1]) ; 
  
  sum += a[n-1] ;
  cout << sum << endl ; 
  
}
  
  

Compiler output:
a.cc: In function 'int main()':
a.cc:10:15: error: 'i' was not declared in this scope
   10 |   int sum = a[i] ;
      |               ^
Language: C++

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

int main() {
  int N;
  cin >> N;
  
  vector<int> B(N-1);
  for (auto &i : B) cin >> i;
  
  int ans = B.front() + B.back();
  for (int i = 0; i < N-1; ++i) ans += min(B[i], B[i+1]);
  cout << ans << endl2
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:18: error: 'endl2' was not declared in this scope
   13 |   cout << ans << endl2
      |                  ^~~~~
Language: C++

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

int main() {
  int N;
  cin >> N;
  
  vector<int> B(N-1);
  for (auto &i : B) cin >> i;
  
  int ans = B.front() + B.back();
  for (int i = 0; i < N-1; ++i) ans += min(B[i], B[i+1]);
  cout << ans << endl2
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> N;
      |   ^~~
a.cc:8:3: error: 'vector' was not declared in this scope
    8 |   vector<int> B(N-1);
      |   ^~~~~~
a.cc:8:10: error: expected primary-expression before 'int'
    8 |   vector<int> B(N-1);
      |          ^~~
a.cc:9:18: error: 'B' was not declared in this scope
    9 |   for (auto &i : B) cin >> i;
      |                  ^
a.cc:11:13: error: 'B' was not declared in this scope
   11 |   int ans = B.front() + B.back();
      |             ^
a.cc:12:40: error: 'min' was not declared in this scope; did you mean 'main'?
   12 |   for (int i = 0; i < N-1; ++i) ans += min(B[i], B[i+1]);
      |                                        ^~~
      |                                        main
a.cc:13:3: error: 'cout' was not declared in this scope
   13 |   cout << ans << endl2
      |   ^~~~
a.cc:13:18: error: 'endl2' was not declared in this scope
   13 |   cout << ans << endl2
      |                  ^~~~~
Language: C++

//Ai=min(Bi-1,Bi)

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

int main(){
  long long N ;
  long long sum ;
  cin >> N ;
  vector<long long> B(100,200000);
  for(int i=0;i<N;i++){
    cin >> B[i];
  }
  
  sum += B[0];
  
  for(int i=1;i<N-1;i++){
    sum += min(B[i-1],i[i]);
  }
  
  sum += B[N-2];
  
  
  cout << sum << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:24: error: invalid types 'int[int]' for array subscript
   18 |     sum += min(B[i-1],i[i]);
      |                        ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(void){
  int n;
  cin>>n;
  vector<int> b(n-1);
  for(int i=0;i<n-1;i++){
    cin>>b[i];
  }
  int ans=0;
  ans+=(b[0]+b[n-2]);
  for(int i=0;i<n-1;i++){
    if(b[i-1]>b[i]){
      ans+=b[i];
    }else{
      ans+=b[i-1];
    }
  }
  cout<<Ans<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:9: error: 'Ans' was not declared in this scope; did you mean 'ans'?
   19 |   cout<<Ans<<endl;
      |         ^~~
      |         ans
Language: C++

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

int main() {
  int N;
  
  cin >> N;
  
  vector<int>B(N-1);
  
  for(int i=0;i<N-1;i++){
    cin >> B.at(i);
  }
  int A= B.at(0);
  for(int i=0;i<N-2;i++){
    if(B.at(i)<= B.at(i+1)){
      A=A+B.at(i);
    }
    else{
      A=A+B.at(i+1);
    }
  }
    
    cout<< A <<endl;
}
  
  
  



}



Compiler output:
a.cc:32:1: error: expected declaration before '}' token
   32 | }
      | ^
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using P = pair<int, int>;

int main() {
    int n;
    cin >> n;
    vector<int> b(n - 1,0);
    int ans = 0;
    rep(i,n - 1) {
        cin >> b[i];
    }

    ans += a[0];
    ans += a[n - 2];

    for(int i = 0; i < n - 2; i++) {
        ans += min(b[i], b[i + 1]);
    }

    cout << ans << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:12: error: 'a' was not declared in this scope
   16 |     ans += a[0];
      |            ^
Language: C++

use std::io::*;
use std::str::FromStr;

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}

fn read_vec2<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
    (0..n).map(|_| read_vec()).collect()
}

fn main() {
    let N: usize = read();
    let b: Vec<isize> = read_vec();
    let mut a: Vec<isize> = vec![0; N];
    let mut sum = 0;

    a[0] = b[0];
    a[1] = b[0];
    for i in 1..b.len() {
        if b[i] < b[i - 1] {
            a[i] = b[i];
            a[i + 1] = b[i];
        } else {
            a[i] = a[i - 1];
            a[i + 1] = b[i];
        }
    }

    for i in a {
        sum += i;
    }

    println!("{}", sum);
}


Compiler output:
a.cc:18:6: error: too many decimal points in number
   18 |     (0..n).map(|_| read_vec()).collect()
      |      ^~~~
a.cc:29:14: error: too many decimal points in number
   29 |     for i in 1..b.len() {
      |              ^~~~~~~~
a.cc:1:1: error: 'use' does not name a type
    1 | use std::io::*;
      | ^~~
a.cc:2:1: error: 'use' does not name a type
    2 | use std::str::FromStr;
      | ^~~
a.cc:4:1: error: 'fn' does not name a type
    4 | fn read<T: std::str::FromStr>() -> T {
      | ^~
a.cc:10:1: error: 'fn' does not name a type
   10 | fn read_vec<T: std::str::FromStr>() -> Vec<T> {
      | ^~
a.cc:17:1: error: 'fn' does not name a type
   17 | fn read_vec2<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
      | ^~
a.cc:21:1: error: 'fn' does not name a type
   21 | fn main() {
      | ^~
Language: C++

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

#define ll long long
#define vec vector<ll>
#define sortv(a); sort(a.begin(), a.end());
#define rev(a); reverse(a.begin(), a.end());
#define FOR(i,a,b) for (ll i = (ll)(a); i < (b); i++)
#define ROF(i,a,b) for (ll i = (ll)(b)-1; i >= (a); i--)

ll MOD = 1000000007;
ll INF = 1LL << 60;

int main() {
	ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	
	int n;
	cin >> n;
	vec a(n), vec b(n-1);
	FOR(i,0,n-1) {
		cin>>b[i];
	}
	a[n-1]=INF;
	for(int i=n-2;i>=0;i--) {
		a[i+1]=min(a[i+1],b[i]);
		a[i]=b[i];
	}
	ll out=0;
	FOR(i,0,n) {
		out+=a[i];
	}
	cout<<out;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:23: error: invalid declarator before 'b'
   19 |         vec a(n), vec b(n-1);
      |                       ^
a.cc:21:22: error: 'b' was not declared in this scope
   21 |                 cin>>b[i];
      |                      ^
a.cc:25:35: error: 'b' was not declared in this scope
   25 |                 a[i+1]=min(a[i+1],b[i]);
      |                                   ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
typedef long long ll;
int main() {
  ll n; cin>>n;
  vector<ll> b(n-1);
  rep(i, n-1) cin>>b.at(i);
  ll s=0;
  s+=a.at(0); s+=b.at(n-2);
  for(int i=1; i<n-1; i++) s+=min(b.at(i-1), b.at(i));
  cout << s << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:6: error: 'a' was not declared in this scope
   10 |   s+=a.at(0); s+=b.at(n-2);
      |      ^
Language: C++


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

    vector<int> a(n),b(n-1);
    for(int i=0; i<n-1; i++){
        cin>>b[i];
    }

    int sum=0;
    a[n-1]=b[n-2];

    for(int i=n-2; i>0; i--){
        if(b[i-1]>b[i]){
            a[i]=b[i];
        }else{
            a[i]=b[i-1];
        }
    }

    a[0]=b[0];

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

    cout<<sum<<endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:4:5: error: 'cin' was not declared in this scope
    4 |     cin>>n;
      |     ^~~
a.cc:6:5: error: 'vector' was not declared in this scope
    6 |     vector<int> a(n),b(n-1);
      |     ^~~~~~
a.cc:6:12: error: expected primary-expression before 'int'
    6 |     vector<int> a(n),b(n-1);
      |            ^~~
a.cc:8:14: error: 'b' was not declared in this scope
    8 |         cin>>b[i];
      |              ^
a.cc:12:5: error: 'a' was not declared in this scope
   12 |     a[n-1]=b[n-2];
      |     ^
a.cc:12:12: error: 'b' was not declared in this scope
   12 |     a[n-1]=b[n-2];
      |            ^
a.cc:28:5: error: 'cout' was not declared in this scope
   28 |     cout<<sum<<endl;
      |     ^~~~
a.cc:28:16: error: 'endl' was not declared in this scope
   28 |     cout<<sum<<endl;
      |                ^~~~
Language: C++

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

int main() {
  int n;

  cin >> n;

  vector<int> b, a;

  for (int i = 0; i < n - 1; i++) {
    int tmp;
    cin >> tmp;
    b.push_back(tmp);
  }

  int ans = b.at(0) + b.at(n - 2);

  for (int i = 0; i < n - 2; i++) {
    ans += min(b.at(i), b.at(i + 1));
  }

  cout << ans;

  return 0;
}

Compiler output:
a.cc:1:3: error: stray '#' in program
    1 | 00#include <bits/stdc++.h>
      |   ^
a.cc:1:1: error: expected unqualified-id before numeric constant
    1 | 00#include <bits/stdc++.h>
      | ^~
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope
    7 |   cin >> n;
      |   ^~~
a.cc:9:3: error: 'vector' was not declared in this scope
    9 |   vector<int> b, a;
      |   ^~~~~~
a.cc:9:10: error: expected primary-expression before 'int'
    9 |   vector<int> b, a;
      |          ^~~
a.cc:14:5: error: 'b' was not declared in this scope
   14 |     b.push_back(tmp);
      |     ^
a.cc:17:13: error: 'b' was not declared in this scope
   17 |   int ans = b.at(0) + b.at(n - 2);
      |             ^
a.cc:20:12: error: 'min' was not declared in this scope; did you mean 'main'?
   20 |     ans += min(b.at(i), b.at(i + 1));
      |            ^~~
      |            main
a.cc:23:3: error: 'cout' was not declared in this scope
   23 |   cout << ans;
      |   ^~~~
Language: C++

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

int main(){
  int n; cin >> n;
  vector<int> b(n - 1); 
  for(int i = 0; i < n - 1; i++){
    cin >> b.at(i);
  }

  int ans = b.at(0) // a0;
  for(int i = 1; i < n - 1; i++){
    ans += min(b.at(i - 1), b.at(i)); //aiを足す
  }
  ans += b.at(n-2); //a(n-1)
  cout << ans << endl;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:12:3: error: expected ',' or ';' before 'for'
   12 |   for(int i = 1; i < n - 1; i++){
      |   ^~~
a.cc:12:18: error: 'i' was not declared in this scope
   12 |   for(int i = 1; i < n - 1; i++){
      |                  ^
Language: C++

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

int main(){
  int n,s=0; cin >>n;
  vector<int>a(n-1);
  for(int i=0; i<n-1; i++){cin >>a[i];}
  for(int i=0; i<n-2; i++){s+=min(a[i],a[i+1]);}
  s+=a[0]+s[n-2];
  cout <<s;
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: invalid types 'int[int]' for array subscript
    9 |   s+=a[0]+s[n-2];
      |            ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;




int main()
{	
	ll n,k=0;
	cin>>n;
	

  for(ll i=0;i<n;i++)
  {
    	cin>>a[i];
    	k+=a[i];
    	
  }
  cout<<k+a[0];
	
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:14: error: 'a' was not declared in this scope
   16 |         cin>>a[i];
      |              ^
a.cc:20:11: error: 'a' was not declared in this scope
   20 |   cout<<k+a[0];
      |           ^
Language: Java

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int ans = 0;
        int [] b = new String [a+1];
        b[0]=100000;
        b[a]=100000;
        for(int i=1;i<a;i++){
                             b[i] = sc.nextInt();
                            }
        for(int i=0;i<a;i++){ans+=Math.min(b[i],b[i+1]);
                            }       
		System.out.println(ans);
	}
}


Compiler output:
Main.java:7: error: incompatible types: String[] cannot be converted to int[]
        int [] b = new String [a+1];
                   ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll MOD=1000000007;
const double PI=3.14159265358979;
const ll INF= pow(10,18);
typedef pair<ll,ll> P;
typedef vector<ll> vl;
typedef vector<vl> vvl;
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define rep(i,n) FOR(i,0,n)
string abc="abcdefghijklmnopqrstuvwxyz";
string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

int main() {
  ll n;
  vl b(n-1);
  rep(i,n-1){
    cin >> b[i];
  }
  ll ans=b[0]+b[n-2];
  rep(i,n-2){
    ans +=min(b[i],b[i+1])
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:27: error: expected ';' before '}' token
   23 |     ans +=min(b[i],b[i+1])
      |                           ^
      |                           ;
   24 |   }
      |   ~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
 int N;
  cin>>N;
  vector<int>B(N-1);
  for(int i=0;i<N-1;i++)
    cin>>B.at(i);
  vector<int>A(N);
  A.at(0)=B.at(0);
  A.at(N-1)=B.at(N-2);
for(int i=1;i<N-1;i++)
  A.at(i)=min(B.at(i),B.at(i-1));
  int ans=0;
  for(int i=0;i<N;i++)
    sum+=A.at(i);
  cout<<sum<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:5: error: 'sum' was not declared in this scope
   16 |     sum+=A.at(i);
      |     ^~~
a.cc:17:9: error: 'sum' was not declared in this scope
   17 |   cout<<sum<<endl;
      |         ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
typedef long long ll;
#define _GLIBCXX_DEBUG
typedef vector<int> vec;
typedef vector<ll> lvec;
typedef vector<char>cvec;
typedef pair<ll, ll> LP;
typedef tuple<ll, ll, ll> LT;
typedef pair<int, int> P;
typedef tuple<int, int, int> T;
int main()	{
  int n,sum=0;
  cin>>n;
  vector<int>b(n-1);
  rep(i,n-1) cin>>b[i];
  vector<int>a(n);
  a[0]=b[0];
  a[1]=b[0];
  for(i=1;i<n-1;i++){
    a[i+1]=b[i];
  }
  rep(i,n)
    sum+=a[i];
  cout<<sum<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:7: error: 'i' was not declared in this scope
   23 |   for(i=1;i<n-1;i++){
      |       ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
 
 
int main(){
  int n;
  cin>>n;
  
  vector<int>b(n-1);
  for(int i=0;i<n-1;i++)cin>>b[i];
  int a=b[0]+b[n-2]
  for(int i=0;i<n-1;i++){
    if(b[i]<=b[i+1])a+=b[i];
    else a+=b[i+1];
  }
  cout<<a<<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:13:3: error: expected ',' or ';' before 'for'
   13 |   for(int i=0;i<n-1;i++){
      |   ^~~
a.cc:13:15: error: 'i' was not declared in this scope
   13 |   for(int i=0;i<n-1;i++){
      |               ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
typedef long long ll;
 
int main(){
  int n;
  cin>>n;
  
  vector<int>b(n-1);
  rep(i,n-1)cin>>b[i];
  int a=b[0]+b[n-2]
  rep(i,n-1){
    if(b[i]<=b[i+1])a+=b[i];
    else a+=b[i+1];
  }
  cout<<a<<endl;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:3:18: error: expected ',' or ';' before 'for'
    3 | #define rep(i,n) for(int i=0;i<(n);i++)
      |                  ^~~
a.cc:13:3: note: in expansion of macro 'rep'
   13 |   rep(i,n-1){
      |   ^~~
a.cc:13:7: error: 'i' was not declared in this scope
   13 |   rep(i,n-1){
      |       ^
a.cc:3:30: note: in definition of macro 'rep'
    3 | #define rep(i,n) for(int i=0;i<(n);i++)
      |                              ^
Language: Java

import java.util.Scanner;

public class A {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int n = in.nextInt();
        int[] a = new int[n];
        int[] b = new int[n-1];

        for (int i = 0; i < n - 1; i++) {
            b[i] = in.nextInt();
        }

        a[n-1] = Integer.MAX_VALUE;
        for (int i = n-2; i >= 0; i--) {
            a[i+1] = Integer.min(a[i+1], b[i]);
            a[i] = b[i];
        }

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

        System.out.println(out);
    }
}


Compiler output:
Main.java:3: error: class A is public, should be declared in a file named A.java
public class A {
       ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
int N;
  cin>>N;
     vector<int> B(N);
   for (int i = 0; i < N-1; i++) {
    cin >> B.at(i);
  }
     vector<int> A(N);
  A[0] = B[0];
for (int i = 1; i <= N-2; i++) {
 A[i] =min(B[i],B[i-1]);
}
A[n-1]=B[n-2];
  int ans=0;
for (int i = 0; i < N; i++) {
 ans +=A[i];
}
  cout<<ans<<endl;
  
  
}





Compiler output:
a.cc: In function 'int main()':
a.cc:16:3: error: 'n' was not declared in this scope
   16 | A[n-1]=B[n-2];
      |   ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
int main(){
  nt n;
  cin >> n;
  int l[n+1];
  l[0]=100000;
  l[n]=100000;
  rep(i,n-1)cin >> l[i+1];
  int ans=0;
  rep(i,n)ans+=min(l[i],l[i+1]);
  cout << ans << endl;
}  


Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'nt' was not declared in this scope; did you mean 'int'?
    5 |   nt n;
      |   ^~
      |   int
a.cc:6:10: error: 'n' was not declared in this scope; did you mean 'yn'?
    6 |   cin >> n;
      |          ^
      |          yn
a.cc:8:3: error: 'l' was not declared in this scope
    8 |   l[0]=100000;
      |   ^
Language: C++

#include<bits/stdc++.h>
#define ll long long int
using namespace std;
int main()
{


    ll k,b,m,q;
    ll c,d,t,i,j,a,n;
   ll kire,ki;
    vector<ll> v,s;
    map< pair<ll,ll> ,pair<ll,ll> > ma,sa;
    map< pair<ll,ll> ,pair<ll,ll> > :: iterator it,ki;
    string st,et;
    cin>>n;
    n = n-1;
    for(i=1;i<=n;i++){
        cin>>a;
        v.push_back(a);
    }
    a= v[0];
    for(i=1;i<n;i++){
        if(v[i-1]>v[i]){
            v[i-1]=v[i];
        }
    }
    for(i=0;i<n;i++){
        a = a+v[i];
    }
    cout<<a<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:52: error: conflicting declaration 'std::map<std::pair<long long int, long long int>, std::pair<long long int, long long int> >::iterator ki'
   13 |     map< pair<ll,ll> ,pair<ll,ll> > :: iterator it,ki;
      |                                                    ^~
a.cc:10:12: note: previous declaration as 'long long int ki'
   10 |    ll kire,ki;
      |            ^~
Language: C++

#include<bits/stdc++.h>
#define ll long long int
#define ki long double
using namespace std;
int main()
{


    ll k,b,m,q;
    ll c,d,t,i,j,a,n;
    vector<ll> v,s;
    map< pair<ll,ll> ,pair<ll,ll> > ma,sa;
    map< pair<ll,ll> ,pair<ll,ll> > :: iterator it,ki;
    string st,et;
    cin>>n;
    n = n-1;
    for(i=1;i<=n;i++){
        cin>>a;
        v.push_back(a);
    }
    a= v[0];
    for(i=1;i<n;i++){
        if(v[i-1]>v[i]){
            v[i-1]=v[i];
        }
    }




    for(i=0;i<n;i++){
        a = a+v[i];
    }
    cout<<a<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:3:12: error: expected unqualified-id before 'long'
    3 | #define ki long double
      |            ^~~~
a.cc:13:52: note: in expansion of macro 'ki'
   13 |     map< pair<ll,ll> ,pair<ll,ll> > :: iterator it,ki;
      |                                                    ^~
Language: C++

#include<iostream>
#include<vector>
#include <cmath>
#include <map>
#include <algorithm>
#include <string>
#define ll long long 
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;

int main(void){
    ll n ;
    cin >> n ;
    ll a[n] , b[n - 1] ;
    ll all=0;
    rep(i , n -1){
        cin >> b[i] ;
    }
    
    all += b[0];
    all += b[n-2];
    for(int i=1;i<=n-2;i++){
        all += min(b[i-1],b[i]);
    }
  
  cout << all << endl;
}


    return 0;
}

Compiler output:
a.cc:30:5: error: expected unqualified-id before 'return'
   30 |     return 0;
      |     ^~~~~~
a.cc:31:1: error: expected declaration before '}' token
   31 | }
      | ^
Language: C++

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
	int a[]=new int[1000],i,j,n,sum,k,m;
    Scanner b =new Scanner(System.in);
    n= b.nextInt();
    for(i=0;i<n-1;i++)
    {
    	a[i]=b.nextInt();
    }
    sum=a[0];
    for(i=0;i<n-2;i++)
    {
    	if(a[i]>=a[i+1])
    	{
    		sum=sum+a[i+1];
    	}
    	else if(a[i+1]>a[i])
    	{
    		sum=sum+a[i];
    	}
    }
    sum=sum+a[n-2];
    System.out.println(""+sum);
	}

}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.Scanner;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main {
      | ^~~~~~
Language: Java

package mypackage.com.bd;

import java.util.Scanner;

public class AtcoderC {

	public static void main(String[] args) {
	int a[]=new int[1000],i,j,n,sum,k,m;
    Scanner b =new Scanner(System.in);
    n= b.nextInt();
    for(i=0;i<n-1;i++)
    {
    	a[i]=b.nextInt();
    }
    sum=a[0];
    for(i=0;i<n-2;i++)
    {
    	if(a[i]>=a[i+1])
    	{
    		sum=sum+a[i+1];
    	}
    	else if(a[i+1]>a[i])
    	{
    		sum=sum+a[i];
    	}
    }
    sum=sum+a[n-2];
    System.out.println(""+sum);
	}

}


Compiler output:
Main.java:5: error: class AtcoderC is public, should be declared in a file named AtcoderC.java
public class AtcoderC {
       ^
1 error
Language: Java

import java.util.Scanner;
class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] seq = new int[n];
    int total = 0;
    if(n ==2){
      total + 2* sc.nextInt();
    }else{
      for(int i = 0; i < n - 1; i++){
   seq[i] = sc.nextInt();
     if(i == 0){
     total += seq[i];
     }else if(i == n-2){
     total += seq[i];
       total += Math.min(seq[i],seq[i-1]);
     }else{
     total += Math.min(seq[i],seq[i-1]);
     }
   }  
    }
    System.out.println(total);
  }

}

Compiler output:
Main.java:9: error: not a statement
      total + 2* sc.nextInt();
            ^
1 error
Language: Java

import java.util.Scanner;
class Main{
  public static void main(String[] args){
    int n = sc.nextInt();
    int[] seq = new int[n];
    total = 0;
   for(int i = 0; i < n; i++){
   seq[i] = sc.nextInt();
     if(i == 0){
     total += seq[i];
     }else if(i == n-1){
     total += seq[i];
     }else{
     total += Math.min(seq[i],seq[i-1]);
     }
     System.out.println(total);
   }  
  }

}

Compiler output:
Main.java:4: error: cannot find symbol
    int n = sc.nextInt();
            ^
  symbol:   variable sc
  location: class Main
Main.java:6: error: cannot find symbol
    total = 0;
    ^
  symbol:   variable total
  location: class Main
Main.java:8: error: cannot find symbol
   seq[i] = sc.nextInt();
            ^
  symbol:   variable sc
  location: class Main
Main.java:10: error: cannot find symbol
     total += seq[i];
     ^
  symbol:   variable total
  location: class Main
Main.java:12: error: cannot find symbol
     total += seq[i];
     ^
  symbol:   variable total
  location: class Main
Main.java:14: error: cannot find symbol
     total += Math.min(seq[i],seq[i-1]);
     ^
  symbol:   variable total
  location: class Main
Main.java:16: error: cannot find symbol
     System.out.println(total);
                        ^
  symbol:   variable total
  location: class Main
7 errors
Language: Java

import java.util.Scanner;
class Main{
  public static void main(String[] args){
    int n = sc.nextInt();
    int[] seq = new int[n];
    total = 0;
   for(int i == 0; i < n; i++){
   seq[i] = sc.nextInt();
     if(i == 0){
     total += seq[i];
     }else if(i == n-1){
     total += seq[i];
     }else{
     total += Math.min(seq[i],seq[i-1]);
     }
     System.out.println(total);
   }  
  }

}

Compiler output:
Main.java:7: error: ';' expected
   for(int i == 0; i < n; i++){
            ^
Main.java:7: error: illegal start of expression
   for(int i == 0; i < n; i++){
             ^
Main.java:7: error: not a statement
   for(int i == 0; i < n; i++){
                     ^
Main.java:7: error: ')' expected
   for(int i == 0; i < n; i++){
                        ^
Main.java:7: error: ';' expected
   for(int i == 0; i < n; i++){
                             ^
5 errors
Language: Java

import java.util.Scanner;
class Main{
  public static void main(String[] args){
    int n = sc.nextInt();
    int[] seq = new int[n];
    total = 0;
   for(int i + 0; i < n; i++){
   seq[i] = sc.nextInt();
     if(i == 0){
     total += seq[i];
     }else if(i == n-1){
     total += seq[i];
     }else{
     total += Math.min(seq[i],seq[i-1]);
     }
     System.out.println(total);
   }  
  }

}

Compiler output:
Main.java:7: error: ';' expected
   for(int i + 0; i < n; i++){
            ^
Main.java:7: error: not a statement
   for(int i + 0; i < n; i++){
                    ^
Main.java:7: error: ')' expected
   for(int i + 0; i < n; i++){
                       ^
Main.java:7: error: ';' expected
   for(int i + 0; i < n; i++){
                            ^
4 errors
Language: C++

#include <iostream>
#include <string>
#include <vector>
using namespace std;

void func140c() {
  int n, ans = 0;
  cint >> n;
  vector<int> a(n);
  vector<int> b(n-1);
  for (int i = 0; i < n-1; i++) cin >> b[i];
  a[0] = b[0];
  ans += a[0];
  for (int i = 1; i <= n-2; i++) {
    a[i] = min(b[i], b[i-1]);
    ans += a[i];
  }
  a[n-1] = b[n-2];
  ans += a[n-1];
  cout << ans << "\n";
}

int main() {
  while (true) {
    func140c();
  }
  return 0;
}

Compiler output:
a.cc: In function 'void func140c()':
a.cc:8:3: error: 'cint' was not declared in this scope; did you mean 'uint'?
    8 |   cint >> n;
      |   ^~~~
      |   uint
Language: C++

#include "stdafx.h"
#include <iostream>
#include <string>
#include <vector>
using namespace std;

void func140c() {
  int n, ans = 0;
  cint >> n;
  vector<int> a(n);
  vector<int> b(n-1);
  for (int i = 0; i < n-1; i++) cin >> b[i];
  a[0] = b[0];
  ans += a[0];
  for (int i = 1; i <= n-2; i++) {
    a[i] = min(b[i], b[i-1]);
    ans += a[i];
  }
  a[n-1] = b[n-2];
  ans += a[n-1];
  cout << ans << "\n";
}

int main() {
  while (true) {
    func140c();
  }
  return 0;
}

Compiler output:
a.cc:1:10: fatal error: stdafx.h: No such file or directory
    1 | #include "stdafx.h"
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
#define FOR(i, a, b) for (int i=a; i<(b); i++)
#define F0R(i, a) for (int i=0; i<(a); i++)
#define FORd(i,a,b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i,a) for (int i = (a)-1; i >= 0; i--)
const int MX = 100001;
using namespace std;
int main() {
	
	int N; cin >> N;
	
	int B[N-1]; F0R(i, N-1) cin >> B[i];
	
	int A[N]; F0R(i, N-1) A[i] = B[i];
	A[N-1] = MX;
	
	F0R(i, N-1) A[i+1] = min(A[i+1], B[i]);
	
	int sum = 0;
	F0R(i, N) {
		sum += A[i];
	}
	
	cout << sum << endl;
	
	return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:26:18: error: expected '}' at end of input
   26 |         return 0;
      |                  ^
a.cc:8:12: note: to match this '{'
    8 | int main() {
      |            ^
Language: C++

#include <string>
#include "pch.h"
#include <iostream>
#include <map>
#include <set>
#include <vector>

using namespace std;

void C_140()
{
  int N;
  cin >> N;

  int pre_B = 100000, sum = 0;
  for (int i = 0; i < N; ++i)
  {
    int B;
    cin >> B;

    if(i=0) sum += 2*B;
    
    if (pre_B > B) sum = sum - pre_B + 2 * B;
    else sum += B;

    pre_B = B;
  }
  cout << sum << endl;
}

int main()
{
  C_140();
}

Compiler output:
a.cc:2:10: fatal error: pch.h: No such file or directory
    2 | #include "pch.h"
      |          ^~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for(ll i = 0; i < (ll)(n); i++)
#define rep2(i, a, n) for(ll i = a; i < (ll)(n); i++)
#define memi cout << endl
#define kono(n) cout << fixed << setprecision(n)
#define all(c) (c).begin(), (c).end()
#define pb push_back
#define hina cout << ‘ ‘
const ll mei = (ll)1e9 + 7;

int main(){
  ll n, k;
  cin >> n;
  vector<ll> a(n);
  rep(i, n - 1)
    cin >> a[i];
  a[n - 1] = a[n - 2];
  k = a[0];
  rep2(i, 1, n){
    k = k + min(a[i] - 1], a[i]);
  }
  cout << k;
  memi;
}

Compiler output:
a.cc:10:22: error: extended character ‘ is not valid in an identifier
   10 | #define hina cout << ‘ ‘
      |                      ^
a.cc:10:24: error: extended character ‘ is not valid in an identifier
   10 | #define hina cout << ‘ ‘
      |                        ^
a.cc: In function 'int main()':
a.cc:22:25: error: expected ')' before ']' token
   22 |     k = k + min(a[i] - 1], a[i]);
      |                ~        ^
      |                         )
Language: Java

import java.util.*;

public class Main{
	public static void main(String[] args){
	  Scanner sc = new Scanner(System.in);
      int N = sc.nextInt();
      int[] B = new int[N-1];
      for(int i=0; i<N - 1; i++){ B[i] = sc.nextInt();}
      int[] A = new in[N];
      for(int i=0; i<N; i++){ A[i] = 100001;}
      int ans=0;
      
      for(int i=0; i<N-1; i++){
      	int n = B[i];
        if(A[i]>n) A[i]=n;
        if(A[i+1]>n) A[i+1]=n;
      }
      for(int i=0; i<N; i++)
        ans += A[i];
      
      System.out.println(ans);

	}
}

Compiler output:
Main.java:9: error: cannot find symbol
      int[] A = new in[N];
                    ^
  symbol:   class in
  location: class Main
1 error
Language: C++

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


int main() {
    int n, ans=0;
    cin >> n;
    int B[n+1];
    for (int i=1; i<n; i++) cin >> B[i];
    B[0] = B[1];
    B[N] = B[n-1];

    for (int i=0; i<n; i++) ans += min(B[i], B[i+1]);
    cout << ans << endl;

    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:11:7: error: 'N' was not declared in this scope
   11 |     B[N] = B[n-1];
      |       ^
Language: C++

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


int main() {
    int n, ans=0;
    cin >> n;
    int B[N+1];
    for (int i=1; i<n; i++) cin >> B[i];
    B[0] = B[1];
    B[N] = B[N-1];

    for (int i=0; i<n; i++) ans += min(B[i], B[i+1]);
    cout << ans << endl;

    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:8:11: error: 'N' was not declared in this scope
    8 |     int B[N+1];
      |           ^
a.cc:9:36: error: 'B' was not declared in this scope
    9 |     for (int i=1; i<n; i++) cin >> B[i];
      |                                    ^
a.cc:10:5: error: 'B' was not declared in this scope
   10 |     B[0] = B[1];
      |     ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int N;
    cin >> N;
  	vector<int> B(N-1);
//    cout << N << endl;
    for (int i = 0; i < N -1; i++) {
        cin >> B[i];
//      	cout << B[i]; cout << ' ';
    }
//    cout << endl;
    int ans = B[0];
    for (int i = 1; i < N-1; i++) {
        ans += min(B[i-1],B[i]);
//        cout << ans; cout << ' ';
    }
//    cout << endl;
    ans+=B[(N-1-)1];
    cout << ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:17: error: expected primary-expression before ')' token
   19 |     ans+=B[(N-1-)1];
      |                 ^
a.cc:19:18: error: expected ']' before numeric constant
   19 |     ans+=B[(N-1-)1];
      |                  ^
      |                  ]
Language: C

int main(void){
  int n;
  scanf("%d",&n);
  
  int a[n]={},i,m;
  a[0] = 100001;
  
  for(i=0; i<n; i++){
    scanf("%d",&m);
    if(a[i]>m) a[i] = m;
    a[i+1] = m;
  }
  
  int sum=0;
  
  for(i=0; i<n; i++){
    sum += a[i];
  }
  
  printf("%d",sum);
  
  return 0;
}
  
  

Compiler output:
main.c: In function 'main':
main.c:3:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    3 |   scanf("%d",&n);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | int main(void){
main.c:3:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    3 |   scanf("%d",&n);
      |   ^~~~~
main.c:3:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:20:3: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   20 |   printf("%d",sum);
      |   ^~~~~~
main.c:20:3: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:20:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:20:3: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C++

#include <iostream>
using namespace std;

int main() {
  int n;
  cin>>n;
  int b[n-1];
  for(int i = 0; i < n - 1; i++) cin>>b[i];
  sum = b[0] + b[n-2];
  for(int i = 1; i < n - 2; i++) sum += min(b[i],b[i-1]);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: 'sum' was not declared in this scope
    9 |   sum = b[0] + b[n-2];
      |   ^~~
Language: C

#include<stdio.h>
 
int main(void) {
  
  int N,B[100];
  
  //標準入力
  scanf("%d", &N);
  for(int i = 0; i < N - 1; i++)  {
    scanf("%d", &B[i]);
  }
  
  //Aの要素の総和の最大値sumを求める
  int sum = 0;
  sum += B[0];
  for(int i = 0; i < N - 2; i++) {
    if (B[i] <= B[i+1]) {
      sum += B[i];
    } else (B[i] > B[i+1]) {
      sum += B[i+1];
    }
  }
  sum += B[N-2];
  
  //出力
  printf("%d\n", sum);
  
  return 0;
  
}


Compiler output:
main.c: In function 'main':
main.c:19:27: error: expected ';' before '{' token
   19 |     } else (B[i] > B[i+1]) {
      |                           ^~
      |                           ;
Language: C++


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp14
{
    class Class34
    {
        static void Main()
        {
            int N = int.Parse(Console.ReadLine());
            var B = Console.ReadLine().Split().Select(int.Parse).ToArray();
            var A = new int[N];
            A[0] = B[0];
            for(int i = 0; i < N-1; i++)
            {
                A[i] = Math.Min(A[i], B[i]);
                A[i + 1] = B[i];
            }
            
            Console.WriteLine(A.Sum());
        }
    }
}


Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'System'
    2 | using System;
      |       ^~~~~~
a.cc:3:7: error: expected nested-name-specifier before 'System'
    3 | using System.Collections.Generic;
      |       ^~~~~~
a.cc:4:7: error: expected nested-name-specifier before 'System'
    4 | using System.Linq;
      |       ^~~~~~
a.cc:5:7: error: expected nested-name-specifier before 'System'
    5 | using System.Text;
      |       ^~~~~~
a.cc:6:7: error: expected nested-name-specifier before 'System'
    6 | using System.Threading.Tasks;
      |       ^~~~~~
a.cc:26:6: error: expected ';' after class definition
   26 |     }
      |      ^
      |      ;
a.cc: In static member function 'static void ConsoleApp14::Class34::Main()':
a.cc:14:21: error: expected primary-expression before 'int'
   14 |             int N = int.Parse(Console.ReadLine());
      |                     ^~~
a.cc:15:13: error: 'var' was not declared in this scope
   15 |             var B = Console.ReadLine().Split().Select(int.Parse).ToArray();
      |             ^~~
a.cc:16:17: error: expected ';' before 'A'
   16 |             var A = new int[N];
      |                 ^
a.cc:17:13: error: 'A' was not declared in this scope
   17 |             A[0] = B[0];
      |             ^
a.cc:17:20: error: 'B' was not declared in this scope
   17 |             A[0] = B[0];
      |                    ^
a.cc:20:24: error: 'Math' was not declared in this scope
   20 |                 A[i] = Math.Min(A[i], B[i]);
      |                        ^~~~
a.cc:24:13: error: 'Console' was not declared in this scope
   24 |             Console.WriteLine(A.Sum());
      |             ^~~~~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
	int t;
	cin>>t;
	int arr[t],brr[t-1];
	int count=0;
	for(int i=0;i<t-1;i++){
		cin>>brr[i];
	}
  arr[0]=brr[0];
  arr[n-1]=brr[n-2];
	for(int i=1;i<t-1;i++){
		else{
			arr[i]=min(brr[i-1],brr[i]);
		}
	}
  for(int i=0;i<t;i++){
  count+=arr[i];
  }
	cout<<count<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:7: error: 'n' was not declared in this scope
   13 |   arr[n-1]=brr[n-2];
      |       ^
a.cc:15:17: error: 'else' without a previous 'if'
   15 |                 else{
      |                 ^~~~
Language: C++

#include <iostream>
#include <vector>
using namespace std;
 
int main() {
  int N;
  cin >> N;
  String res = "";
  vector<int> Blist;
  for (int i = 0; i < N - 1; i++) {
    int B;
    cin >> B;
    Blist.push_back(B);
  }
  for (int i = 0; i < N-1; i++) {
    res = res + min(Blist[i], Blist[i+1])
  }
  cout << res << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'String' was not declared in this scope
    8 |   String res = "";
      |   ^~~~~~
a.cc:16:5: error: 'res' was not declared in this scope
   16 |     res = res + min(Blist[i], Blist[i+1])
      |     ^~~
a.cc:18:11: error: 'res' was not declared in this scope
   18 |   cout << res << endl;
      |           ^~~
Language: C++

#include <iostream>
#include <vector>
using namespace std;

int main() {
  int N;
  cin >> N;
  String res = "";
  vector<int> Blist;
  for (int i = 0; i < N - 1; i++) {
    int B;
    cin >> B;
    Blist.push_back(B);
  }
  for (int i = 0; i < N-1; i++) {
    res = res + min(Blist[i], Blist[i+1])
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'String' was not declared in this scope
    8 |   String res = "";
      |   ^~~~~~
a.cc:16:5: error: 'res' was not declared in this scope
   16 |     res = res + min(Blist[i], Blist[i+1])
      |     ^~~