Submission #523768

#	Time	Username	Problem	Language	Result	Execution time	Memory
523768		mansur	Boat (APIO16_boat)	C++17	31 / 100	2103 ms	113272 KiB

boat

#include<bits/stdc++.h>	
 
#pragma optimize ("g",on)
#pragma GCC optimize ("inline")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")

//01001101 01100001 01101011 01101000 01100001  01100111 01100001 01111001 

using namespace std;

#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()
#define ll long long
#define pb push_back
#define sz(a) a.size()
#define nl '\n'
#define popb pop_back()                                                                   
#define ld double
#define ull unsigned long long
#define ff first                                         
#define ss second  
#define fix fixed << setprecision
#define pii pair<int, int>                          
#define E exit (0)
#define int long long
 
const int inf = 1e18, N = 1000001, mod = 1e9 + 7;                    

double eps = 1e-6;

vector<pii> dir = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};

struct node {
	node *l, *r;
	int sum;
	node () {
		l = 0, r = 0, sum = 0;
	}
};

void update(node *u, int tl, int tr, int pos, int val) {
	if (tl == tr) {
		u -> sum = (u -> sum + val) % mod;
		return;
	}
	int mid = (tl + tr) / 2;
	if (!(u -> l)) u -> l = new node();
	if (!(u -> r)) u -> r = new node();
	if (pos <= mid) update(u -> l, tl, mid, pos, val);
	else update(u -> r, mid + 1, tr, pos, val);
	u -> sum = (u -> l -> sum + u -> r -> sum) % mod;
}

int get(node* u, int tl, int tr, int l, int r) {
	if (tl > r || tr < l) return 0;
	if (tl >= l && tr <= r) return u -> sum;
	int mid = (tl + tr) / 2;
	int a = 0, b = 0;
	if (u -> l) a = get(u -> l, tl, mid, l, r);
	if (u -> r) b = get(u -> r, mid + 1, tr, l, r);
	return (a + b) % mod;
}

main() {                                                         
	//freopen("F.in", "r", stdin);                                                                                     
	//freopen("F.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(NULL);                                	                                                       
	cin.tie(NULL);
	int n;
	cin >> n;
	int a[n + 1], b[n + 1];
	for (int i = 1; i <= n; i++) {
		cin >> a[i] >> b[i];
	}	
	node *root = new node();
	update(root, 0, inf, 0, 1);
	for (int i = 1; i <= n; i++) {
		for (int cur = b[i]; cur >= a[i]; cur--) {
			update(root, 0, inf, cur, get(root, 0, inf, 0, cur - 1));
		}
	}
	cout << get(root, 0, inf, 1, inf);
}
                                                                           

Compilation message (stderr)

boat.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize ("g",on)
      | 
boat.cpp:67:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   67 | main() {
      | ^~~~

• Subtask 1: 9 / 9
• Subtask 2: 22 / 22
• Subtask 3: 0 / 27
• Subtask 4: 0 / 42