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View Compilation Error

0_0_36567892_20024.cpp: In function 'll Dir_MST(int, int, int)':
0_0_36567892_20024.cpp:30:21: error: 'edge' was not declared in this scope
             int u = edge[i].u, v = edge[i].v;
                     ^
0_0_36567892_20024.cpp:31:22: error: 'v' was not declared in this scope
             if (u != v && in[v] > edge[i].val)   //不能是在一个环内的,浪费时间,节约时间用
                      ^
0_0_36567892_20024.cpp:42:36: error: 'memset' was not declared in this scope
         memset(vis, -1, sizeof(vis));
                                    ^
0_0_36567892_20024.cpp:60:21: error: 'edge' was not declared in this scope
             int u = edge[i].u, v = edge[i].v;
                     ^
0_0_36567892_20024.cpp:62:28: error: 'v' was not declared in this scope
             edge[i].v = id[v];
                            ^
0_0_36567892_20024.cpp: In function 'int main()':
0_0_36567892_20024.cpp:90:46: error: 'zhuliu' was not declared in this scope
         printf("%lld\n", zhuliu(0, n + 1, cnt));
                                              ^


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