View Compilation Error

0_0_18036211_31266.cpp:12:9: error: stray '\' in program
         }   /\n<=m  
         ^
0_0_18036211_31266.cpp: In function 'int main()':
0_0_18036211_31266.cpp:12:13: error: expected primary-expression before '/' token
         }   /\n<=m  
             ^
0_0_18036211_31266.cpp:17:13: error: 'answer' was not declared in this scope
             answer = n / 2;  
             ^
0_0_18036211_31266.cpp:18:22: error: 'ans' was not declared in this scope
         else if(x == ans || x == ans + 1 || y == 1 || y == m)  
                      ^
0_0_18036211_31266.cpp:19:13: error: 'answer' was not declared in this scope
             answer = ans;  
             ^
0_0_18036211_31266.cpp:21:13: error: 'answer' was not declared in this scope
             answer= min(max(up,down),min(left,right));  
             ^
0_0_18036211_31266.cpp:23:13: error: 'answer' was not declared in this scope
             answer = ans;  
             ^
0_0_18036211_31266.cpp:24:23: error: 'answer' was not declared in this scope
         printf("%d\n",answer);  
                       ^