View Compilation Error

0_0_33626490_29614.cpp: In function 'void Solve()':
0_0_33626490_29614.cpp:40:48: error: 'mx' was not declared in this scope
             dp[j+i.fi]=mx(dp[j+i.fi],dp[j]+i.se);
                                                ^
0_0_33626490_29614.cpp:44:48: error: 'mx' was not declared in this scope
             dp[j+i.fi]=mx(dp[j+i.fi],dp[j]+i.se);
                                                ^