Submission #422898

#	Time	Username	Problem	Language	Result	Execution time	Memory
422898		abdzag	Crossing (JOI21_crossing)	C++17	26 / 100	824 ms	34764 KiB

Main

#include<bits/stdc++.h>
#include<unordered_map>
#define rep(i,a,b) for(int i=int(a);i<int(b);i++)
#define rrep(i,a,b) for(int i=int(a);i>int(b);i--)
#define trav(a,v) for(auto& a: v)
#define sz(v) v.size()
#define all(v) v.begin(),v.end()
#define vi vector<int>

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
//const long long inf = 1e15;

using namespace std;

/**
 * Author: Simon Lindholm
 * Date: 2016-10-08
 * License: CC0
 * Source: me
 * Description: Segment tree with ability to add or set values of large intervals, and compute max of intervals.
 * Can be changed to other things.
 * Use with a bump allocator for better performance, and SmallPtr or implicit indices to save memory.
 * Time: O(\log N).
 * Usage: Node* tr = new Node(v, 0, sz(v));
 * Status: stress-tested a bit
 */


const int inf = 1e9;
struct Node {
	Node* l = 0, * r = 0;
	ull lo, hi, mset = inf, madd = 1, val = 0, val0 = 0;
	Node(int lo, int hi) :lo(lo), hi(hi) {} // Large interval of -inf
	Node(vector<ull>& v, int lo, int hi) : lo(lo), hi(hi) {
		if (lo + 1 < hi) {
			int mid = lo + (hi - lo) / 2;
			l = new Node(v, lo, mid); r = new Node(v, mid, hi);
			val = l->val + r->val;
			val0 = l->val + r->val;
		}
		else val = val0 = v[lo];
	}
	ull query(int L, int R) {
		if (R <= lo || hi <= L) return 0;
		if (L <= lo && hi <= R) return val;
		push();
		return l->query(L, R) + r->query(L, R);
	}
	void set(int L, int R, int x) {
		if (R <= lo || hi <= L) return;
		if (L <= lo && hi <= R) mset = val = x, madd = 1;
		else {
			push(), l->set(L, R, x), r->set(L, R, x);
			val = l->val + r->val;
		}
	}
	void add(int L, int R, ull x) {

		if (R <= lo || hi <= L) return;
		if (L <= lo && hi <= R) {
			madd = 1;
			val = val0;
			if (mset != inf) mset += x;
			else madd *= x;
			val *= x;
		}
		else {
			push(), l->add(L, R, x), r->add(L, R, x);
			val = l->val + r->val;
		}
	}
	void push() {
		if (!l) {
			int mid = lo + (hi - lo) / 2;
			l = new Node(lo, mid); r = new Node(mid, hi);
		}
		if (mset != inf)
			l->set(lo, hi, mset), r->set(lo, hi, mset), mset = inf;
		else if (madd != 1)
			l->add(lo, hi, madd), r->add(lo, hi, madd), madd = 1;
	}
};
int main() {
	cin.sync_with_stdio(false);
	ll n;
	cin >> n;
	string a, b, c;
	cin >> a >> b >> c;
	srand(n);
	vector<ull> primes = { 37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,191,193,197 };
	ull C = primes[rand()%primes.size()];
	vector<ull> hashed(n);
	hashed[0] = 1;
	ll MOD = 1000000007;
	rep(i, 1, n) {
		hashed[i] = (hashed[i - 1] * C)%MOD;
	}
	ull val = 0;
	ll q;
	cin >> q;
	string t;
	cin >> t;
	rep(i, 0, n)val += hashed[i] * a[i];
	Node* tree = new Node(hashed, 0, n);
	rep(i, 0, n)tree->add(i, i + 1, t[i]);
	cout << (tree->query(0, n) == val ? "Yes" : "No") << endl;
	rep(i, 0, q) {
		ll A, B;
		char d;
		cin >> A >> B >> d;
		tree->add(A - 1, B, d);
		//cout << val << endl;
		//cout << tree->query(0, n) << endl;;
		cout << (tree->query(0, n) == val ? "Yes" : "No") << endl;
	}
	return 0;
}

Compilation message (stderr)

Main.cpp: In member function 'ull Node::query(int, int)':
Main.cpp:46:9: warning: comparison of integer expressions of different signedness: 'int' and 'ull' {aka 'long long unsigned int'} [-Wsign-compare]
   46 |   if (R <= lo || hi <= L) return 0;
      |       ~~^~~~~
Main.cpp:46:21: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'int' [-Wsign-compare]
   46 |   if (R <= lo || hi <= L) return 0;
      |                  ~~~^~~~
Main.cpp:47:9: warning: comparison of integer expressions of different signedness: 'int' and 'ull' {aka 'long long unsigned int'} [-Wsign-compare]
   47 |   if (L <= lo && hi <= R) return val;
      |       ~~^~~~~
Main.cpp:47:21: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'int' [-Wsign-compare]
   47 |   if (L <= lo && hi <= R) return val;
      |                  ~~~^~~~
Main.cpp: In member function 'void Node::set(int, int, int)':
Main.cpp:52:9: warning: comparison of integer expressions of different signedness: 'int' and 'ull' {aka 'long long unsigned int'} [-Wsign-compare]
   52 |   if (R <= lo || hi <= L) return;
      |       ~~^~~~~
Main.cpp:52:21: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'int' [-Wsign-compare]
   52 |   if (R <= lo || hi <= L) return;
      |                  ~~~^~~~
Main.cpp:53:9: warning: comparison of integer expressions of different signedness: 'int' and 'ull' {aka 'long long unsigned int'} [-Wsign-compare]
   53 |   if (L <= lo && hi <= R) mset = val = x, madd = 1;
      |       ~~^~~~~
Main.cpp:53:21: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'int' [-Wsign-compare]
   53 |   if (L <= lo && hi <= R) mset = val = x, madd = 1;
      |                  ~~~^~~~
Main.cpp: In member function 'void Node::add(int, int, ull)':
Main.cpp:61:9: warning: comparison of integer expressions of different signedness: 'int' and 'ull' {aka 'long long unsigned int'} [-Wsign-compare]
   61 |   if (R <= lo || hi <= L) return;
      |       ~~^~~~~
Main.cpp:61:21: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'int' [-Wsign-compare]
   61 |   if (R <= lo || hi <= L) return;
      |                  ~~~^~~~
Main.cpp:62:9: warning: comparison of integer expressions of different signedness: 'int' and 'ull' {aka 'long long unsigned int'} [-Wsign-compare]
   62 |   if (L <= lo && hi <= R) {
      |       ~~^~~~~
Main.cpp:62:21: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'int' [-Wsign-compare]
   62 |   if (L <= lo && hi <= R) {
      |                  ~~~^~~~

• Subtask 1: 3 / 3
• Subtask 2: 23 / 23
• Subtask 3: 0 / 23
• Subtask 4: 0 / 51