View Compilation Error

0_0_32438919_23481.cpp: In function 'int main()':
0_0_32438919_23481.cpp:6:25: error: 'scanf' was not declared in this scope
     while(~scanf("%d",&l))
                         ^
0_0_32438919_23481.cpp:41:62: error: 'min' was not declared in this scope
                     dp[j]=min(dp[j],dp[i]+x*1.0/vt1+y*1.0/vt2);
                                                              ^
0_0_32438919_23481.cpp:43:64: error: 'min' was not declared in this scope
                     dp[j]=min(dp[j],dp[i]+t+x*1.0/vt1+y*1.0/vt2);
                                                                ^
0_0_32438919_23481.cpp:47:39: error: 'puts' was not declared in this scope
             puts("What a pity rabbit!");
                                       ^
0_0_32438919_23481.cpp:49:36: error: 'puts' was not declared in this scope
             puts("Good job,rabbit!");
                                    ^