View Compilation Error

0_0_37902829_31357.cpp: In function 'int main()':
0_0_37902829_31357.cpp:35:28: error: 'inf' was not declared in this scope
       if(dp[pre][j][k][w]>=inf)continue;
                            ^
0_0_37902829_31357.cpp:42:11: error: 'inf' was not declared in this scope
   int ans=inf;
           ^