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Submission #1084511

# Submission time Handle Problem Language Result Execution time Memory
1084511 2024-09-06T10:52:20 Z peacebringer1667 Boat (APIO16_boat) C++17
31 / 100
 473 ms 524288 KB 
#include<bits/stdc++.h>
#define ll long long
#define ldb long double
#define fi first
#define se second
#define sza(a) (int)a.size()
#define pir pair<int,int>
#define pirll pair<ll,ll>
using namespace std;
const int maxn = 5e2 + 5;
const int modu = 1e9 + 7;

pir a[maxn];
void input(int n){
	for (int i = 1 ; i <= n ; i++) cin >> a[i].fi >> a[i].se;
}

namespace sub1_2{
	map <int,int> M;
	const int N = 1e6 + 5;
	
	struct fenwick_tree{
		ll fenwick[N];
		
		void update(int x,int n,ll val){
			while (x <= n){
				fenwick[x] = (fenwick[x] + val) % modu;
				x = x | (x + 1);
			}
		}
		
		ll calc(int x){
			ll res = 0;
			while (x > 0){
				res = (res + fenwick[x]) % modu;
				x = x & (x + 1);
				x--;
			}
			return res;
		}
	} fw;
	
	void compress(int n){
		vector <int> V;
		
		for (int i = 1 ; i <= n ; i++)
			for (int j = a[i].fi ; j <= a[i].se ; j++)
			  V.push_back(j);
			
		sort(V.begin(),V.end());
		int cur = 0,lst = 0;
		
		for (int x : V){
			if (x != lst){
				lst = x;
				cur++;
			}
			
			M[x] = cur;
		}
	}
	
	ll solve(int n){
		compress(n);
		int lim = 0;
		for (int i = 1 ; i <= n ; i++) lim = max(lim,M[a[i].se]);
		
		for (int i = a[1].fi ; i <= a[1].se ; i++)
		  fw.update(M[i],lim,1);
		
		for (int i = 2 ; i <= n ; i++){
			for (int v = a[i].se ; v >= a[i].fi ; v--){
				ll val = fw.calc(M[v] - 1) + 1;
				fw.update(M[v],lim,val);
			}
		}
		
		return fw.calc(lim);
	}
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
	
	int n;
	cin >> n;
	input(n);
	
	cout << sub1_2::solve(n);

	return 0;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 388 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 480 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 388 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 480 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 142 ms 4560 KB Output is correct
22 Correct 131 ms 4564 KB Output is correct
23 Correct 125 ms 4560 KB Output is correct
24 Correct 132 ms 4564 KB Output is correct
25 Correct 139 ms 4560 KB Output is correct
26 Correct 143 ms 4864 KB Output is correct
27 Correct 140 ms 4564 KB Output is correct
28 Correct 138 ms 4560 KB Output is correct
29 Correct 143 ms 4560 KB Output is correct
30 Correct 433 ms 54404 KB Output is correct
31 Correct 438 ms 53448 KB Output is correct
32 Correct 444 ms 54456 KB Output is correct
33 Correct 443 ms 53224 KB Output is correct
34 Correct 433 ms 53600 KB Output is correct
35 Correct 441 ms 51196 KB Output is correct
36 Correct 437 ms 52992 KB Output is correct
37 Correct 473 ms 53400 KB Output is correct
38 Correct 458 ms 51704 KB Output is correct

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Runtime error 393 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 388 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 480 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 142 ms 4560 KB Output is correct
22 Correct 131 ms 4564 KB Output is correct
23 Correct 125 ms 4560 KB Output is correct
24 Correct 132 ms 4564 KB Output is correct
25 Correct 139 ms 4560 KB Output is correct
26 Correct 143 ms 4864 KB Output is correct
27 Correct 140 ms 4564 KB Output is correct
28 Correct 138 ms 4560 KB Output is correct
29 Correct 143 ms 4560 KB Output is correct
30 Correct 433 ms 54404 KB Output is correct
31 Correct 438 ms 53448 KB Output is correct
32 Correct 444 ms 54456 KB Output is correct
33 Correct 443 ms 53224 KB Output is correct
34 Correct 433 ms 53600 KB Output is correct
35 Correct 441 ms 51196 KB Output is correct
36 Correct 437 ms 52992 KB Output is correct
37 Correct 473 ms 53400 KB Output is correct
38 Correct 458 ms 51704 KB Output is correct
39 Runtime error 393 ms 524288 KB Execution killed with signal 9
40 Halted 0 ms 0 KB -