1_872_12_24464.cpp:38:1: error: 'unordered_map' does not name a type
unordered_map<pair<int,int>,int>evis;
^
1_872_12_24464.cpp:39:1: error: 'unordered_map' does not name a type
unordered_map<int,int>huan;
^
1_872_12_24464.cpp: In function 'void dfs(ll, ll)':
1_872_12_24464.cpp:53:12: error: 'evis' was not declared in this scope
if(evis[{u,v}]&&evis[{v,u}])continue;
^
1_872_12_24464.cpp:56:13: error: 'evis' was not declared in this scope
evis[{u,v}]=1;
^
1_872_12_24464.cpp:58:13: error: 'huan' was not declared in this scope
huan[depth[u]-depth[v]+1]++;
^
1_872_12_24464.cpp: In function 'int main()':
1_872_12_24464.cpp:87:5: error: 'unordered_map' was not declared in this scope
unordered_map<int,int>::iterator it;
^
1_872_12_24464.cpp:87:19: error: expected primary-expression before 'int'
unordered_map<int,int>::iterator it;
^
1_872_12_24464.cpp:88:9: error: 'it' was not declared in this scope
for(it=huan.begin();it!=huan.end();it++)
^
1_872_12_24464.cpp:88:12: error: 'huan' was not declared in this scope
for(it=huan.begin();it!=huan.end();it++)
^
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