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답안 #1087317

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1087317 2024-09-12T13:29:03 Z xnqs Bigger segments (IZhO19_segments) C++17
13 / 100
 129 ms 9472 KB 
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <utility>
#include <algorithm>
#include <unordered_map>

const int BULAN = 130;
int x;
int arr[500005];
int64_t pfx[500005];
std::unordered_map<int64_t,std::unordered_map<int,int>> memo;

inline int64_t sum_query(int l, int r) {
	return pfx[r] - pfx[l-1];
}

int solve(int64_t cap, int pos = x) {
	if (memo.count(cap)&&memo[cap].count(pos)) {
		return memo[cap][pos];
	}
	if (pos==0) {
		return 0;
	}
	if (arr[pos]>cap) {
		return -0x3f3f3f3f;
	}

	int i = pos+1;
	int64_t sum = 0;
	int ret = -0x3f3f3f3f;
	int cnt = 0;
	while (i-1>=1&&sum+arr[i-1]<=cap) {
		--i;
		sum += arr[i];

		++cnt;
		if (cnt<=BULAN) {
			ret = std::max(ret,1+solve(sum,i-1));
		}
	}

	ret = std::max(ret,1+solve(sum,i-1));

	return memo[cap][pos] = ret;
}

int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(NULL);
	std::cout.tie(NULL);

	std::cin >> x;
	for (int i = 1; i <= x; i++) {
		std::cin >> arr[i];
		pfx[i] = pfx[i-1] + arr[i];
	}

	/*for (int cap = 1; cap <= 50; cap++) {
		std::cout << cap << " " << solve(cap) << "\n";
	}*/

	const auto bs = [&]() {
		int ret = 1;
		int64_t l = 1, r = 1000000000000000000;
		while (l<=r) {
			int64_t m = (l+r)/2;
			int tmp = solve(m);
			if (tmp!=-0x3f3f3f3f) {
				ret = std::max(ret,tmp);
				r = m-1;
			}
			else {
				l = m+1;
			}
		}
		return ret;
	};

	std::cout << bs() << "\n";
}

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 496 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct

Subtask #2
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 496 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 63 ms 2388 KB Output is correct
17 Correct 69 ms 7032 KB Output is correct
18 Correct 75 ms 7840 KB Output is correct
19 Correct 17 ms 1628 KB Output is correct
20 Correct 60 ms 2132 KB Output is correct
21 Correct 120 ms 9472 KB Output is correct
22 Correct 92 ms 7100 KB Output is correct
23 Correct 34 ms 4436 KB Output is correct
24 Correct 85 ms 2108 KB Output is correct
25 Correct 129 ms 9392 KB Output is correct
26 Correct 107 ms 3904 KB Output is correct
27 Incorrect 65 ms 2420 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 496 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 63 ms 2388 KB Output is correct
17 Correct 69 ms 7032 KB Output is correct
18 Correct 75 ms 7840 KB Output is correct
19 Correct 17 ms 1628 KB Output is correct
20 Correct 60 ms 2132 KB Output is correct
21 Correct 120 ms 9472 KB Output is correct
22 Correct 92 ms 7100 KB Output is correct
23 Correct 34 ms 4436 KB Output is correct
24 Correct 85 ms 2108 KB Output is correct
25 Correct 129 ms 9392 KB Output is correct
26 Correct 107 ms 3904 KB Output is correct
27 Incorrect 65 ms 2420 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #4
0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 496 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 63 ms 2388 KB Output is correct
17 Correct 69 ms 7032 KB Output is correct
18 Correct 75 ms 7840 KB Output is correct
19 Correct 17 ms 1628 KB Output is correct
20 Correct 60 ms 2132 KB Output is correct
21 Correct 120 ms 9472 KB Output is correct
22 Correct 92 ms 7100 KB Output is correct
23 Correct 34 ms 4436 KB Output is correct
24 Correct 85 ms 2108 KB Output is correct
25 Correct 129 ms 9392 KB Output is correct
26 Correct 107 ms 3904 KB Output is correct
27 Incorrect 65 ms 2420 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 496 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 63 ms 2388 KB Output is correct
17 Correct 69 ms 7032 KB Output is correct
18 Correct 75 ms 7840 KB Output is correct
19 Correct 17 ms 1628 KB Output is correct
20 Correct 60 ms 2132 KB Output is correct
21 Correct 120 ms 9472 KB Output is correct
22 Correct 92 ms 7100 KB Output is correct
23 Correct 34 ms 4436 KB Output is correct
24 Correct 85 ms 2108 KB Output is correct
25 Correct 129 ms 9392 KB Output is correct
26 Correct 107 ms 3904 KB Output is correct
27 Incorrect 65 ms 2420 KB Output isn't correct
28 Halted 0 ms 0 KB -