View Compilation Error

0_0_30254707_4868.cpp: In function 'int main()':
0_0_30254707_4868.cpp:24:22: error: 'inf' was not declared in this scope
             pos[i] = inf;
                      ^
0_0_30254707_4868.cpp:28:20: error: 'inf' was not declared in this scope
         memset(dp, inf, sizeof(dp));
                    ^