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Submission #641133

# Submission time Handle Problem Language Result Execution time Memory
641133 2022-09-16T04:50:59 Z xiaossr Rice Hub (IOI11_ricehub) C++17
100 / 100
 15 ms 2516 KB 
// IOI 2011
// Day 1 Problem 3, Rice Hub

#include <iostream>
#include <ricehub.h>
using namespace std;

/*
* Idea: sliding window on range - 
*		if less dist take max?
*		median is the location of hub
*/

typedef long long ll;

ll psum[100005];

ll cst(int R, int l, int r)
{
	if (l == r) return 0;

	int mid = (l + r) / 2;
	if ((r - l) % 2) return psum[r] - psum[mid] - (psum[mid] - (l ? psum[l - 1] : 0));
	else return psum[r] - psum[mid] - (psum[mid - 1] - (l ? psum[l - 1] : 0));
}

// R: number of rice fields
// L: longest dist
// X: all the field's locations
// B: max number spent
// return best r - l + 1
int besthub(int R, int L, int X[], ll B)
{
	psum[0] = X[0];
	for (int i = 1; i < R; i++)
		psum[i] = psum[i - 1] + X[i];

	int l = 0, r = 0, ans = 1;
	while (r < R)
	{
		if (cst(R, l, r) <= B) ans = max(ans, r - l + 1);

		while (r + 1 < R && cst(R, l, r + 1) <= B)
		{
			++r;
			ans = max(ans, r - l + 1);
		}

		while (cst(R, l, r) > B)
			++l;
		++r;
	}

	return ans;
}

//int main()
//{
//	int arr[] = { 1, 4, 10, 11, 14 };
//	cout << besthub(5, 20, arr, 18);
//	return 0;
//}

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 304 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 304 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 308 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 224 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct

Subtask #3
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 312 KB Output is correct
13 Correct 1 ms 304 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 312 KB Output is correct
21 Correct 1 ms 320 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 2 ms 340 KB Output is correct
26 Correct 1 ms 360 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 324 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 468 KB Output is correct
2 Correct 3 ms 568 KB Output is correct
3 Correct 11 ms 2428 KB Output is correct
4 Correct 11 ms 2480 KB Output is correct
5 Correct 7 ms 1220 KB Output is correct
6 Correct 5 ms 1236 KB Output is correct
7 Correct 15 ms 2148 KB Output is correct
8 Correct 10 ms 2220 KB Output is correct
9 Correct 5 ms 1076 KB Output is correct
10 Correct 5 ms 1092 KB Output is correct
11 Correct 11 ms 2440 KB Output is correct
12 Correct 11 ms 2516 KB Output is correct
13 Correct 5 ms 1236 KB Output is correct
14 Correct 8 ms 1216 KB Output is correct
15 Correct 9 ms 1876 KB Output is correct
16 Correct 8 ms 1888 KB Output is correct
17 Correct 10 ms 2236 KB Output is correct
18 Correct 10 ms 2212 KB Output is correct
19 Correct 11 ms 2400 KB Output is correct
20 Correct 10 ms 2388 KB Output is correct