View Compilation Error

0_0_18929813_9696.cpp: In function 'void Solve()':
0_0_18929813_9696.cpp:11:26: error: 'scanf' was not declared in this scope
     while(~scanf("%d", &n) && n)
                          ^
0_0_18929813_9696.cpp:20:34: error: 'INF' was not declared in this scope
                     path[i][j] = INF;
                                  ^
0_0_18929813_9696.cpp:51:56: error: 'printf' was not declared in this scope
             printf("From %d to %d :\nPath: %d", s, e, s);
                                                        ^
0_0_18929813_9696.cpp: At global scope:
0_0_18929813_9696.cpp:66:1: error: 'HDU' does not name a type
 HDU 1385
 ^