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View Compilation Error

0_0_26136948_15452.cpp:4:7: error: 'MAXN' was not declared in this scope
 int g[MAXN][MAXN];//ÁÚ½Ó¾ØÕó
       ^
0_0_26136948_15452.cpp:4:13: error: 'MAXN' was not declared in this scope
 int g[MAXN][MAXN];//ÁÚ½Ó¾ØÕó
             ^
0_0_26136948_15452.cpp:5:12: error: 'MAXN' was not declared in this scope
 int linker[MAXN];
            ^
0_0_26136948_15452.cpp:6:11: error: 'MAXN' was not declared in this scope
 bool used[MAXN];
           ^
0_0_26136948_15452.cpp: In function 'bool dfs(int)':
0_0_26136948_15452.cpp:10:12: error: 'g' was not declared in this scope
         if(g[u][v] && !used[v])
            ^
0_0_26136948_15452.cpp:10:24: error: 'used' was not declared in this scope
         if(g[u][v] && !used[v])
                        ^
0_0_26136948_15452.cpp:13:16: error: 'linker' was not declared in this scope
             if(linker[v] == -1 || dfs(linker[v]))
                ^
0_0_26136948_15452.cpp: In function 'int hungary()':
0_0_26136948_15452.cpp:24:12: error: 'linker' was not declared in this scope
     memset(linker, -1, sizeof(linker));
            ^
0_0_26136948_15452.cpp:24:38: error: 'memset' was not declared in this scope
     memset(linker, -1, sizeof(linker));
                                      ^
0_0_26136948_15452.cpp:27:16: error: 'used' was not declared in this scope
         memset(used, false, sizeof(used));
                ^


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