View Compilation Error

0_0_29722318_4716.cpp: In function 'int main()':
0_0_29722318_4716.cpp:25:33: error: 'n' was not declared in this scope
             for(int j = 0; j <= n; j++)
                                 ^
0_0_29722318_4716.cpp:26:39: error: 'INF' was not declared in this scope
                 station[i][j]=(i==j?0:INF);
                                       ^