Submission #497573

#	Time	Username	Problem	Language	Result	Execution time	Memory
497573		vinnipuh01	Bigger segments (IZhO19_segments)	C++17	0 / 100	56 ms	125472 KiB

segments

#include <iostream>
#include <bits/stdc++.h>
#include <cmath>
#include <algorithm>
#include <vector>
#include <deque>
#include <set>
#include <stack>
#include <string>
#include <map>
#include <queue>
 
using namespace std;
 
const long long oo = 1000000000000000000;
 
long long sum, ans = 0, mx = 0, mn = 1000000000, num, pos;
 
 
/*
    ViHHiPuh
 
   (( `'-""``""-'` ))
     )-__-_.._-__-(
   / --- (o _ o) --- \
   \ .-* ( .0. ) *-. /
   _'-. ,_ '=' _, .-'_
  / `;#'#'# - #'#'#;` \
 \_)) -----'#'----- ((_/
      # --------- #
  '# ------- ------ #'
  /..-'# ------- #'-.\
  _\...-\'# -- #'/-.../_
  ((____)- '#' -(____))
 
 
    cout << fixed << setprecision(6) << x;
 
 
    freopen ( "sum.in", "r", stdin )
*/
 
struct Node {
	vector <int> v;
	int ans;
	public :
		Node operator + ( Node a ) {
			Node c;
			c.ans = max( ans, a.ans );
			int l, r;
			l = r = 0;
			int mx = v.back();
			int mxx = 0;
			while ( l < v.size() && r < a.v.size() ) {
				if ( v[ l ] < a.v[ r ] ) {
					c.v.push_back( v[ l ] );
					l ++;
				}
				else {
					c.v.push_back( a.v[ r ] );
					if ( a.v[ r ] > mxx && a.v[ r ] < mx )
						mxx = a.v[ r ];
					r ++;
				}
			}
			while ( l < v.size() ) {
				c.v.push_back( v[ l ] );
				l ++;
			}
			while ( r < a.v.size() ) {
				c.v.push_back( a.v[ r ] );
				if ( a.v[ r ] > mxx && a.v[ r ] < mx )
					mxx = a.v[ r ];
				r ++;
			}
			return c;
		}
} t[ 4000001 ];
 
struct Node1 {
	int ans, mx;
} an;
 
int n, m, a[ 1000001 ];
 
void build( int v, int tl, int tr ) {
	if ( tl == tr ) {
		t[ v ].v.push_back( a[ tl ] );
		t[ v ].ans = 0;
		return;
	}
	int mid = ( tl + tr ) / 2;
	build( v + v, tl, mid );
	build( v + v + 1, mid + 1, tr );
	t[ v ] = t[ v + v ] + t[ v + v + 1 ];
}
 
void gett( int v, int tl, int tr, int l, int r ) {
	if ( tl > r || tr < l )
		return;
	if ( tl >= l && tr <= r ) {
		an.ans = max( an.ans, t[ v ].ans );
		if ( an.mx > t[ v ].v.front() ) {
			auto it = lower_bound( t[ v ].v.begin(), t[ v ].v.end(), an.mx );
			it = --it;
			an.ans = max( an.ans, an.mx + *it );
		}
		an.mx = max( an.mx, t[ v ].v.back() );
		return;
	}
	int mid = ( tl + tr ) / 2;
	gett( v + v, tl, mid, l, r );
	gett( v + v + 1, mid + 1, tr, l, r );
}

struct Node2 {
	int mn, mx, inv;
	public :
		Node2 operator + ( Node2 a ) {
			Node2 c;
			c.inv = max( inv, a.inv );
			if ( a.mn < mx )
				c.inv = 1;
			c.mn = min( mn, a.mn );
			c.mx = max( mx, a.mx );
			return c;
		}
} t1[ 4000001 ];
 
void build1( int v, int tl, int tr ) {
	if ( tl == tr ) {
		t1[ v ].mn = a[ tl ];
		t1[ v ].mx = a[ tl ];
		t1[ v ].inv = 0;
		return;
	}
	int mid = ( tl + tr ) / 2;
	build1( v + v, tl, mid );
	build1( v + v + 1, mid + 1, tr );
	t1[ v ] = t1[ v + v ] + t1[ v + v + 1 ];
}
 
void gett1( int v, int tl, int tr, int l, int r ) {
	if ( tl > r || tr < l )
		return;
	if ( tl >= l && tr <= r ) {
		if ( t1[ v ].mn < mx || t1[ v ].inv )
			num = 1;
		mx = max( mx, t1[ v ].mx + 0ll );
		return;
	}
	int mid = ( tl + tr ) / 2;
	gett1( v + v, tl, mid, l, r );
	gett1( v + v + 1, mid + 1, tr, l, r );
}

main () {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
	cin >> n >> m;
	for ( int i = 1; i <= n; i ++ ) {
		cin >> a[ i ];
	}
	int l, r, x;
	if ( n <= 2e5 && m <= 2e5 )
		build( 1, 1, n );
	else
		build1( 1, 1, n );
	while ( m -- ) {
		cin >> l >> r >> x;
		if ( n <= 2e5 && m <= 2e5 ) {
			num = 0;
			an.mx = 0;
			an.ans = 0;
			gett( 1, 1, n, l, r );
			cout << ( x >= an.ans ) << "\n";
		}
		else {
			num = 0;
			mx = -1;
			gett1( 1, 1, n, l, r );
			cout << !num << "\n";
		}
	}
}
 
/*
9 1
10 6 7 10 1 3 7 3 7 
2 3 1
 
3 1 
7 1 9
1 3 8
 
*/

Compilation message (stderr)

segments.cpp: In member function 'Node Node::operator+(Node)':
segments.cpp:54:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |    while ( l < v.size() && r < a.v.size() ) {
      |            ~~^~~~~~~~~~
segments.cpp:54:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |    while ( l < v.size() && r < a.v.size() ) {
      |                            ~~^~~~~~~~~~~~
segments.cpp:66:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |    while ( l < v.size() ) {
      |            ~~^~~~~~~~~~
segments.cpp:70:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |    while ( r < a.v.size() ) {
      |            ~~^~~~~~~~~~~~
segments.cpp: At global scope:
segments.cpp:157:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  157 | main () {
      | ^~~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27