0_0_38126539_26440.cpp:1:8: error: 'maxn' was not declared in this scope
int fa[maxn];
^
0_0_38126539_26440.cpp: In function 'int find(int)':
0_0_38126539_26440.cpp:4:17: error: 'fa' was not declared in this scope
return x == fa[x] ? x : fa[x] = find(fa[x]);
^
0_0_38126539_26440.cpp: In function 'void merge(int, int)':
0_0_38126539_26440.cpp:8:5: error: 'fa' was not declared in this scope
fa[x] = y;
^
0_0_38126539_26440.cpp: In function 'int main()':
0_0_38126539_26440.cpp:24:5: error: 'set' was not declared in this scope
set<int> s;
^
0_0_38126539_26440.cpp:24:9: error: expected primary-expression before 'int'
set<int> s;
^
0_0_38126539_26440.cpp:25:25: error: 'maxn' was not declared in this scope
for (int i = 1; i < maxn; i++) fa[i] = i;
^
0_0_38126539_26440.cpp:25:36: error: 'fa' was not declared in this scope
for (int i = 1; i < maxn; i++) fa[i] = i;
^
0_0_38126539_26440.cpp:26:12: error: 'cin' was not declared in this scope
while (cin >> n >> m) {
^
0_0_38126539_26440.cpp:29:13: error: 's' was not declared in this scope
s.insert(n);
^
0_0_38126539_26440.cpp:36:39: error: 's' was not declared in this scope
if ((edge != 0 && edge != s.size() - 1) || !ok) {
^
0_0_38126539_26440.cpp:37:17: error: 'cout' was not declared in this scope
cout << "Case " << ++kase << " is not a tree." << endl;
^
0_0_38126539_26440.cpp:37:67: error: 'endl' was not declared in this scope
cout << "Case " << ++kase << " is not a tree." << endl;
^
0_0_38126539_26440.cpp:40:17: error: 'cout' was not declared in this scope
cout << "Case " << ++kase << " is a tree." << endl;
^
0_0_38126539_26440.cpp:40:63: error: 'endl' was not declared in this scope
cout << "Case " << ++kase << " is a tree." << endl;
^
0_0_38126539_26440.cpp:44:13: error: 's' was not declared in this scope
s.clear();
^
0_0_38126539_26440.cpp:45:33: error: 'maxn' was not declared in this scope
for (int i = 1; i < maxn; i++) fa[i] = i;
^
0_0_38126539_26440.cpp:45:44: error: 'fa' was not declared in this scope
for (int i = 1; i < maxn; i++) fa[i] = i;
^
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