Submission #1037442

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1037442	2024-07-28T21:46:21 Z	wood	Joker (BOI20_joker)	C++17	Compilation error	0 ms	0 KB

Joker

#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
typedef pair<int,int> p32;
typedef vector<p32> vp32;
#define pb push_back
#define eb emplace_back
#define fi first
#define se second 

int main(){
	int n,m,q; cin>>n>>m>>q;
	vp32 adj[n];
	for(int i = 0; i<m; i++){
		int a,b; cin>>a>>b;
		a--; b--;
		adj[a].eb(b,i+1);
		adj[b].eb(a,i+1);
	}
	vp32 querries[200];
	for(int j = 0; j<q; j++){
		int l,r; cin>>l>>r;	
		querries[l-1].eb(r,i);
	}
	int res[n];
	memset(res,0,sizeof res);
	for(int l = 0; l<200; l++){
		sort(querries[l].begin(),querries[l].end());
		int left = -1, right = querries[l].size();
		while(right-left>1){
			int m = (right+left)/2;
			int parent[n];
			int depth[n];
			memset(parent,0,sizeof parent);
			memset(depth,0,sizeof depth);
			stack<int> qu;
			for(int i = 0; i<n; i++){
				if(!parent[i]){
					parent[i] = i+1;
					qu.push(i);
					while(!qu.empty()){
						int x = qu.top();
						depth[x] = depth[parent[x]-1]+1;
						qu.pop();
						for(p32 tt : adj[x]){
							if(tt.se<l||tt.se>querries[l][m].first){
								if(depth[tt.fi]&&parent[x]-1!=tt.fi&&((depth[x]-depth[tt.fi]+1)&1)) goto found;
								if(parent[tt.fi]==0){
									parent[tt.fi] = x+1;
									qu.push(tt.fi);
								}
							}
						}
					}
				}
			}
			right = m;
			continue;
found:
			left = m;
		}
		for(int i = 0; i<=l; i++){
			res[querries[l][i].se] = true;
		}
	}
	for(bool x : res) cout<<(x ? "YES" : "NO");
	return 0;
}

Compilation message

Joker.cpp: In function 'int main()':
Joker.cpp:23:22: error: 'i' was not declared in this scope
   23 |   querries[l-1].eb(r,i);
      |                      ^