Language: C++

#include<bits/stdc++.h>
#define mp make_pair
#define f first
#define s second
using namespace std;

int x,y,z,dp[10005][5],ar[10005][5];

int main(){
	cin >> x;
	for (int a#include<bits/stdc++.h>
#define mp make_pair
#define f first
#define s second
using namespace std;

int x,y,z,dp[10005][5],ar[10005][5];

int main(){
	cin >> x;
	for (int a = 1; a <= x; a++) {
		for (int b = 1; b <= 3; b++) {
			cin >> ar[a][b];
		}
	}
	for (int a = 1; a <= x; a++) {
		dp[a][1] = max(dp[a-1][2],dp[a-1][3]) + ar[a][1];
		dp[a][2] = max(dp[a-1][1],dp[a-1][3]) + ar[a][2];
		dp[a][3] = max(dp[a-1][1],dp[a-1][2]) + ar[a][3];
	}
	cout << max(dp[x][1],max(dp[x][2],dp[x][3])) << "\n";
    return 0;
} = 1; a <= x; a++) {
		for (int b = 1; b <= 3; b++) {
			cin >> ar[a][b];
		}
	}
	for (int a = 1; a <= x; a++) {
		dp[a][1] = max(dp[a-1][2],dp[a-1][3]) + ar[a][1];
		dp[a][2] = max(dp[a-1][1],dp[a-1][3]) + ar[a][2];
		dp[a][3] = max(dp[a-1][1],dp[a-1][2]) + ar[a][3];
	}
	cout << max(dp[x][1],max(dp[x][2],dp[x][3])) << "\n";
    return 0;
}

Compiler output:
a.cc:11:19: error: stray '#' in program
   11 |         for (int a#include<bits/stdc++.h>
      |                   ^
a.cc: In function 'int main()':
a.cc:11:19: error: expected ';' before 'include'
   11 |         for (int a#include<bits/stdc++.h>
      |                   ^~~~~~~~
      |                   ;
a.cc:11:20: error: 'include' was not declared in this scope
   11 |         for (int a#include<bits/stdc++.h>
      |                    ^~~~~~~
a.cc:11:28: error: 'bits' was not declared in this scope
   11 |         for (int a#include<bits/stdc++.h>
      |                            ^~~~
a.cc:11:33: error: 'stdc' was not declared in this scope; did you mean 'std'?
   11 |         for (int a#include<bits/stdc++.h>
      |                                 ^~~~
      |                                 std
a.cc:15:1: error: expected primary-expression before 'using'
   15 | using namespace std;
      | ^~~~~
a.cc:11:42: error: expected ';' before 'using'
   11 |         for (int a#include<bits/stdc++.h>
      |                                          ^
      |                                          ;
......
   15 | using namespace std;
      | ~~~~~                                     
a.cc:15:1: error: expected primary-expression before 'using'
   15 | using namespace std;
      | ^~~~~
a.cc:11:42: error: expected ')' before 'using'
   11 |         for (int a#include<bits/stdc++.h>
      |             ~                            ^
      |                                          )
......
   15 | using namespace std;
      | ~~~~~                                     
a.cc:19:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   19 | int main(){
      |         ^~
a.cc:19:9: note: remove parentheses to default-initialize a variable
   19 | int main(){
      |         ^~
      |         --
a.cc:19:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:19:11: error: a function-definition is not allowed here before '{' token
   19 | int main(){
      |           ^
a.cc:33:3: error: expected primary-expression before '=' token
   33 | } = 1; a <= x; a++) {
      |   ^
a.cc:33:8: error: 'a' was not declared in this scope; did you mean 'ar'?
   33 | } = 1; a <= x; a++) {
      |        ^
      |        ar