Submission #675193

#	Time	Username	Problem	Language	Result	Execution time	Memory
675193		SanguineChameleon	Trampoline (info1cup20_trampoline)	C++17	100 / 100	732 ms	46456 KiB

trampoline

// BEGIN BOILERPLATE CODE

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

#ifdef KAMIRULEZ
	const bool kami_loc = true;
	const long long kami_seed = 69420;
#else
	const bool kami_loc = false;
	const long long kami_seed = chrono::steady_clock::now().time_since_epoch().count();
#endif

const string kami_fi = "kamirulez.inp";
const string kami_fo = "kamirulez.out";
mt19937_64 kami_gen(kami_seed);

long long rand_range(long long rmin, long long rmax) {
	uniform_int_distribution<long long> rdist(rmin, rmax);
	return rdist(kami_gen);
}

long double rand_real(long double rmin, long double rmax) {
	uniform_real_distribution<long double> rdist(rmin, rmax);
	return rdist(kami_gen);
}

void file_io(string fi, string fo) {
	if (fi != "" && (!kami_loc || fi == kami_fi)) {
		freopen(fi.c_str(), "r", stdin);
	}
	if (fo != "" && (!kami_loc || fo == kami_fo)) {
		freopen(fo.c_str(), "w", stdout);
	}
}

void set_up() {
	if (kami_loc) {
		file_io(kami_fi, kami_fo);
	}
	ios_base::sync_with_stdio(0);
	cin.tie(0);
}

void just_do_it();

void just_exec_it() {
	if (kami_loc) {
		auto pstart = chrono::steady_clock::now();
		just_do_it();
		auto pend = chrono::steady_clock::now();
		long long ptime = chrono::duration_cast<chrono::milliseconds>(pend - pstart).count();
		string bar(50, '=');
		cout << '\n' << bar << '\n';
		cout << "Time: " << ptime << " ms" << '\n';
	}
	else {
		just_do_it();
	}
}

int main() {
	set_up();
	just_exec_it();
	return 0;
}

// END BOILERPLATE CODE

// BEGIN MAIN CODE

const int ms = 2e5 + 20;
const int st = 20;
map<int, set<pair<int, int>>> f;
int px[ms];
int py[ms];
int nxt[ms][st];

int get(int px, int py) {
	auto it1 = f.find(px);
	if (it1 == f.end()) {
		return 0;
	}
	auto it2 = it1->second.lower_bound(make_pair(py, -1));
	if (it2 == it1->second.end()) {
		return 0;
	}
	return it2->second;
}

void just_do_it() {
	int n;
	cin >> n >> n >> n;
	for (int i = 1; i <= n; i++) {
		cin >> px[i] >> py[i];
		f[px[i]].insert({py[i], i});
	}
	for (int u = 1; u <= n; u++) {
		nxt[u][0] = get(px[u] + 1, py[u]);
	}
	for (int k = 1; k < st; k++) {
		for (int u = 1; u <= n; u++) {
			nxt[u][k] = nxt[nxt[u][k - 1]][k - 1];
		}
	}
	int q;
	cin >> q;
	for (int i = 0; i < q; i++) {
		int sx, sy, tx, ty;
		cin >> sx >> sy >> tx >> ty;
		if (sx == tx) {
			if (sy <= ty) {
				cout << "Yes" << '\n';
			}
			else {
				cout << "No" << '\n';
			}
			continue;
		}
		else if (sx > tx) {
			cout << "No" << '\n';
			continue;
		}
		int u = get(sx, sy);
		for (int k = 0; k < st; k++) {
			if (((tx - sx - 1) >> k) & 1) {
				u = nxt[u][k];
			}
		}
		if (u == 0) {
			cout << "No" << '\n';
			continue;
		}
		if (py[u] <= ty) {
			cout << "Yes" << '\n';
		}
		else {
			cout << "No" << '\n';
		}
	}
}

// END MAIN CODE

Compilation message (stderr)

trampoline.cpp: In function 'void file_io(std::string, std::string)':
trampoline.cpp:30:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |   freopen(fi.c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
trampoline.cpp:33:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |   freopen(fo.c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 23 / 23
• Subtask 2: 20 / 20
• Subtask 3: 11 / 11
• Subtask 4: 19 / 19
• Subtask 5: 27 / 27