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View Compilation Error

0_0_19311823_21235.cpp:14:1: error: 'inthead' does not name a type
 inthead[MAXN], ad;
 ^
0_0_19311823_21235.cpp: In function 'int voidclear()':
0_0_19311823_21235.cpp:17:5: error: 'ad' was not declared in this scope
     ad = 0;
     ^
0_0_19311823_21235.cpp:18:12: error: 'head' was not declared in this scope
     memset(head, -1, sizeof(head));
            ^
0_0_19311823_21235.cpp: In function 'void insert(int, int, int)':
0_0_19311823_21235.cpp:22:11: error: 'ad' was not declared in this scope
     edges[ad].to = v, edges[ad].flux = flux, edges[ad].next = head[u], head[u] = ad ++;
           ^
0_0_19311823_21235.cpp:22:63: error: 'head' was not declared in this scope
     edges[ad].to = v, edges[ad].flux = flux, edges[ad].next = head[u], head[u] = ad ++;
                                                               ^
0_0_19311823_21235.cpp: In function 'void Built(int, int, int&)':
0_0_19311823_21235.cpp:29:11: error: 'clear' was not declared in this scope
     clear();
           ^
0_0_19311823_21235.cpp: At global scope:
0_0_19311823_21235.cpp:41:1: error: 'intqueue' does not name a type
 intqueue[MAXN], cur[MAXN], vis[MAXN], d[MAXN];
 ^
0_0_19311823_21235.cpp: In function 'int bfs(int, int)':
0_0_19311823_21235.cpp:45:12: error: 'd' was not declared in this scope
     memset(d, -1, sizeof(d));
            ^
0_0_19311823_21235.cpp:47:5: error: 'queue' was not declared in this scope
     queue[0] = s;
     ^
0_0_19311823_21235.cpp:50:16: error: 'head' was not declared in this scope
        for(p = head[u]; ~p; p = edges[p].next){
                ^
0_0_19311823_21235.cpp: In function 'int dfs(int, int)':
0_0_19311823_21235.cpp:63:5: error: 'vis' was not declared in this scope
     vis[x] = 1;
     ^
0_0_19311823_21235.cpp:64:17: error: 'cur' was not declared in this scope
     for(int p = cur[x], temp, v; ~p; p = edges[p].next, cur[x] = p){
                 ^
0_0_19311823_21235.cpp:65:8: error: 'v' was not declared in this scope
        v = edges[p].to;
        ^
0_0_19311823_21235.cpp:66:37: error: 'd' was not declared in this scope
        if(!vis[v], edges[p].flux && d[v] == d[x] + 1)
                                     ^
0_0_19311823_21235.cpp:67:15: error: 'temp' was not declared in this scope
            if(temp = dfs(v, low < edges[p].flux ? low : edges[p].flux)){
               ^
0_0_19311823_21235.cpp: In function 'int dinic(int, int)':
0_0_19311823_21235.cpp:80:33: error: 'cur' was not declared in this scope
        for(i = s; i <= t; i ++) cur[i] = head[i];
                                 ^
0_0_19311823_21235.cpp:80:42: error: 'head' was not declared in this scope
        for(i = s; i <= t; i ++) cur[i] = head[i];
                                          ^
0_0_19311823_21235.cpp:82:19: error: 'vis' was not declared in this scope
            memset(vis, 0, sizeof(vis));
                   ^


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