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        /* read the rest of the line */
        if(c != '\n')
            while(getchar() != '\n');

char symbol[3][10][4]; // wrong

	p--;
}
return 0;

if(array[i][j] == array[x0][y0] && i != x0 && j != y0)

if(array[i][j] == array[x0][y0] && !(i == x0 && j == y0))

node nodes[CNODE] = {{post, in, N}}, *p = nodes, *n;

Liquid Warning: Liquid syntax error (line 76): Expected end_of_string but found comma in "{{post, in, N}}" in /home/luxu/Code/PAT/_articles/a1020.md

#include <bits/stdc++.h>
using namespace std;
map<int,vector<int> >mp;
map<int,bool>shown;
bool isvalid(vector <int> box){
	for(int i=0;i<box.size();i++){
		for(int j=0;i<mp[box[i]].size();j++)
			if(shown[mp[box[i]][j]])return false;
	}return true;
}
int main(int argc, char **argv)
{
	int n,m;
	scanf("%d %d",&n,&m);
	for(int i=0;i<n;i++){
		int a,b;
		scanf("%d %d",&a,&b);
		mp[a].push_back(b);
		mp[b].push_back(a);
	}
	for(int i=0;i<m;i++){
		
		int t;
		cin>>t;
		vector<int > box;
		shown.clear();//
		while(t--){
			int b;
			cin>>b;
			box.push_back(b);
			shown[b]=true;
		}
		if(isvalid(box))printf("Yes\n");
		else printf("No\n");
		
	}
	
	
	return 0;
}