View Compilation Error

0_0_33332927_4316.cpp: In function 'void floyd()':
0_0_33332927_4316.cpp:31:60: error: 'min' was not declared in this scope
                 dis[i][j]=min(dis[i][j],dis[i][k]+dis[k][j]) ;
                                                            ^
0_0_33332927_4316.cpp: In function 'int main()':
0_0_33332927_4316.cpp:35:30: error: 'scanf' was not declared in this scope
     while(~scanf("%d%d",&n,&m))
                              ^
0_0_33332927_4316.cpp:80:54: error: 'printf' was not declared in this scope
             if(dis[s][t]!=INF)printf("%d\n",dis[s][t]) ;
                                                      ^
0_0_33332927_4316.cpp:81:30: error: 'puts' was not declared in this scope
             else puts("Sorry") ;
                              ^