View Compilation Error

0_0_30728975_30877.cpp: In function 'void dfs(int, int, int)':
0_0_30728975_30877.cpp:27:18: error: 'MLL' was not declared in this scope
             if ((MLL)(Y[u] - Y[v]) > (MLL)(X[u] - X[v]) * dis[x]) now = u;
                  ^
0_0_30728975_30877.cpp:31:18: error: 'MLL' was not declared in this scope
             if ((MLL)(Y[now] - Y[v]) > (MLL)(X[now] - X[v]) * dis[x]) now = par[now][0];
                  ^
0_0_30728975_30877.cpp:48:18: error: 'MLL' was not declared in this scope
             if ((MLL)(Y[u] - Y[v]) * (X[x] - X[u]) > (MLL)(Y[x] - Y[u]) * (X[u] - X[v])) now = u;
                  ^
0_0_30728975_30877.cpp:52:18: error: 'MLL' was not declared in this scope
             if ((MLL)(Y[now] - Y[v]) * (X[x] - X[now]) > (MLL)(Y[x] - Y[now]) * (X[now] - X[v])) now = par[now][0];
                  ^