Submission #334537

#	Time	Username	Problem	Language	Result	Execution time	Memory
334537		Trickster	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	77 / 100	3091 ms	262144 KiB

sortbooks

#include <algorithm>
#include <iostream>
#include <stdio.h>
#include <vector>
#include <queue>
#include <cmath>
#include <set>
#include <map>
 
#define N 1000010
#define ff first
#define ss second
#define ll long long
#define pb push_back
#define mod 1000000007
#define pii pair <int, int>
 
using namespace std;
 
int MX;
int n, q;
int v[N];
int arr[N];
pii T[N*4];
int l, r, x;
vector <int> E[N*4];
 
void uni(int CEP, int SAG, int node)
{
	vector <int> res;
	pii ans = {-1, -1};
	
	if(node == 0) {
		int a = lower_bound(E[SAG].begin(), E[SAG].end(), MX) - E[SAG].begin();
		a--;
		
		
		if(T[CEP].ss == -1 || T[SAG].ss == -1) { ans = (T[CEP].ss == -1 ? T[SAG] : T[CEP]); }
		else {
			if(T[CEP].ff + T[CEP].ss >= T[SAG].ff + T[SAG].ss) ans = T[CEP];
			else ans = T[SAG];
		}
		
		if(a != -1) {
			int x = E[SAG][a];
			
			if(ans.ss == -1 || ans.ff + ans.ss < MX + x) ans = {MX, x};
		}
		
		if(T[node].ss == -1 || (ans.ss != -1 && ans.ff+ans.ss >= T[node].ff + T[node].ss)) T[node] = ans;
		
		MX = max(MX, E[SAG].back());
		
		return;
	}
	
	int pos = 0, pos2 = 0;
	while(pos < E[CEP].size() && pos2 < E[SAG].size()) {
		if(E[CEP][pos] <= E[SAG][pos2]) res.pb(E[CEP][pos++]);
		
		else res.pb(E[SAG][pos2++]);
	}
	
	int a = pos2-1;
	
	while(pos < E[CEP].size()) res.pb(E[CEP][pos++]);
	while(pos2 < E[SAG].size()) res.pb(E[SAG][pos2++]);
	
	if(T[CEP].ss == -1 || T[SAG].ss == -1) { ans = (T[CEP].ss == -1 ? T[SAG] : T[CEP]); }
	else {
		if(T[CEP].ff + T[CEP].ss >= T[SAG].ff + T[SAG].ss) ans = T[CEP];
		else ans = T[SAG];
	}
	
	if(a != -1) {
		int x = E[SAG][a];
		
		if(ans.ss == -1 || ans.ff + ans.ss < E[CEP].back() + x) ans = {E[CEP].back(), x};
	}
	
	if(T[node].ss == -1 || (ans.ss != -1 && ans.ff+ans.ss >= T[node].ff + T[node].ss)) T[node] = ans;
	
	E[node].clear();
	for(auto i: res) E[node].pb(i);
}
 
void build(int l, int r, int node)
{
	if(l == r) {
		T[node] = {v[l], -1};
		E[node].pb(v[l]);
		return;
	}
	
	build(l, (l+r)/2, node*2);
	build((l+r)/2+1, r, node*2+1);
	
	uni(node*2, node*2+1, node);
} 
void tap(int a, int b, int l, int r, int node)
{
	if(l > b || r < a) return;
	
	if(l >= a && r <= b) {
		uni(0, node, 0);
		return;
	}
	
	tap(a, b, l, (l+r)/2, node*2);
	tap(a, b, (l+r)/2+1, r, node*2+1);
}
 
int main()
{
    ios::sync_with_stdio(false);
	cin.tie(0);

	cin >> n >> q;
	
    int mn = 1e9;
	for(int i = 1; i <= n; i++) cin >> v[i], mn = min(mn, v[i]);
	
    for(int i = 2; i <= n; i++) {
        arr[i] = arr[i-1];

        if(v[i] < v[i-1]) arr[i]++;
    }

	build(1, n, 1);
	
	for(int i = 1; i <= q; i++) {
		cin >> l >> r >> x;

        if(mn > x) {
            int now = arr[r] - arr[l];

            if(now) puts("0");
            else puts("1");

            continue;
        }

		MX = 0;
		T[0] = {-1, -1};
		tap(l, r, 1, n, 1);
		
		if(T[0].ss == -1 || T[0].ff + T[0].ss <= x) puts("1");
		else puts("0");
	}
}

Compilation message (stderr)

sortbooks.cpp: In function 'void uni(int, int, int)':
sortbooks.cpp:58:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |  while(pos < E[CEP].size() && pos2 < E[SAG].size()) {
      |        ~~~~^~~~~~~~~~~~~~~
sortbooks.cpp:58:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |  while(pos < E[CEP].size() && pos2 < E[SAG].size()) {
      |                               ~~~~~^~~~~~~~~~~~~~~
sortbooks.cpp:66:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |  while(pos < E[CEP].size()) res.pb(E[CEP][pos++]);
      |        ~~~~^~~~~~~~~~~~~~~
sortbooks.cpp:67:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |  while(pos2 < E[SAG].size()) res.pb(E[SAG][pos2++]);
      |        ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 13 / 13
• Subtask 4: 17 / 17
• Subtask 5: 30 / 30
• Subtask 6: 0 / 23