Submission #929408

#	Time	Username	Problem	Language	Result	Execution time	Memory
929408		ono_de206	Curtains (NOI23_curtains)	C++14	24 / 100	218 ms	21328 KiB

curtains

#include<bits/stdc++.h>
using namespace std;

#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second

#define int long long

typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef multiset<int> msi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;
// typedef pair<int, int> P;

template<typename T, typename U>
ostream & operator << (ostream &out, const pair<T, U> &c) {
	out << c.first << ' ' << c.second;
	return out;
}

template<typename T>
ostream & operator << (ostream &out, vector<T> &v) {
	const int sz = v.size();
	for (int i = 0; i < sz; i++) {
		if (i) out << ' ';
		out << v[i];
	}
	return out;
}

template<typename T>
istream & operator >> (istream &in, vector<T> &v) {
	for (T &x : v) in >> x;
	return in;
}

template<typename T, typename U>
	istream & operator >> (istream &in, pair<T, U> &c) {
	in >> c.first;
	in >> c.second;
	return in;
}

template<typename T>
void mxx(T &a, T b){if(b > a) a = b;}
template<typename T>
void mnn(T &a, T b){if(b < a) a = b;}

const int mxn = 2010, MXLOG = 22, mod = 1e9 + 7, P = 1181, D = 1523, N = 2500;
const long long inf = 2e18 + 10;
bool can[mxn][mxn];
vector<int> g[mxn];

void go() {
	int n, m, q;
	cin >> n >> m >> q;
	for(int i = 1; i <= m; i++) {
		int l, r;
		cin >> l >> r;
		g[l].pb(r);
	}
	for(int i = 1; i <= n; i++) {
		sort(all(g[i]));
	}
	for(int i = 1; i <= n; i++) {
		int ls = i + 1;
		for(int j = i; j >= 1; j--) {
			int id = lower_bound(all(g[j]), ls - 1) - g[j].begin();
			if(id < g[j].size() && g[j][id] <= i) ls = j;
			if(ls == j) can[j][i] = 1;
		}
	} 
	while(q--) {
		int l, r;
		cin >> l >> r;
		if(can[l][r]) cout << "YES\n";
		else cout << "NO\n";
	}
}

signed main() {
	fast;
	int t = 1;
	// cin >> t;
	while(t--) {
		go();
	}
	return 0;
}

Compilation message (stderr)

curtains.cpp: In function 'void go()':
curtains.cpp:76:10: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |    if(id < g[j].size() && g[j][id] <= i) ls = j;
      |       ~~~^~~~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 6 / 6
• Subtask 3: 15 / 15
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36
• Subtask 6: 0 / 20