Submission #972059

#	Time	Username	Problem	Language	Result	Execution time	Memory
972059		LCJLY	Long Mansion (JOI17_long_mansion)	C++14	25 / 100	143 ms	15784 KiB

long_mansion

#include <bits/stdc++.h>
using namespace std;
	
#define int long long 
#define ld long double
#define show(x,y) cout << y << " " << #x << endl;
#define show2(x,y,i,j) cout << y << " " << #x << "  " << j << " " << #i << endl;
#define show3(x,y,i,j,p,q) cout << y << " " << #x << "  " << j << " " << #i << "  " << q << " " << #p << endl;
#define show4(x,y) for(auto it:y) cout << it << " "; cout << #x << endl;
typedef pair<long long,long long>pii;
typedef pair<int,pii>pi2;
mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
 
vector<int>storage[5005];
 
bool f(int val, int l, int r){
	int index=lower_bound(storage[val].begin(),storage[val].end(),l)-storage[val].begin();
	//show3(val,val,l,l,r,r);
	//show(sz,storage[val].size());
	if(index==(int)storage[val].size()) return false;
	//show2(index,index,storage[val][index],storage[val][index]);
	if(storage[val][index]<=r) return true;
	return false;
}
 
void solve(){
	int n;
	cin >> n;
	int arr[n+1];
	for(int x=1;x<n;x++){
		cin >> arr[x];
	}
	
	int temp,temp2;
	for(int x=1;x<=n;x++){
		cin >> temp;
		for(int y=0;y<temp;y++){
			cin >> temp2;
			storage[temp2].push_back(x);
		}
	}
	
	pii ans[n+5];
	memset(ans,-1,sizeof(ans));
	for(int x=1;x<=n;x++){
		int l=x;
		int r=x;
		while(1){
			if(l!=1&&f(arr[l-1],l,r)){
				l--;
				if(ans[l].first!=-1){
					r=max(r,ans[l].second);
					l=min(l,ans[l].first);
				}
			}
			else if(r!=n&&f(arr[r],l,r)){
				r++;
			}
			else break;
		}
		ans[x]={l,r};
		//show2(l,l,r,r);
	}
	
	int q;
	cin >> q;
	for(int x=0;x<q;x++){
		cin >> temp >> temp2;
		if(ans[temp].first<=temp2&&ans[temp].second>=temp2){
			cout << "YES\n";
		}
		else cout << "NO\n";
	}
	
}
 
int32_t main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int t=1;
	//freopen("in.txt","r",stdin);
	//cin >> t;
	while(t--){
		solve();
	}
}

Compilation message (stderr)

long_mansion.cpp: In function 'void solve()':
long_mansion.cpp:44:27: warning: 'void* memset(void*, int, size_t)' writing to an object of type 'pii' {aka 'struct std::pair<long long int, long long int>'} with no trivial copy-assignment [-Wclass-memaccess]
   44 |  memset(ans,-1,sizeof(ans));
      |                           ^
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from long_mansion.cpp:1:
/usr/include/c++/10/bits/stl_pair.h:211:12: note: 'pii' {aka 'struct std::pair<long long int, long long int>'} declared here
  211 |     struct pair
      |            ^~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 15 / 15
• Subtask 4: 0 / 75