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답안 #770625

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
770625 2023-07-01T14:29:46 Z josanneo22 메기 농장 (IOI22_fish) C++17
100 / 100
 110 ms 20904 KB 
//#include "fish.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
const int maxn = 1e5 + 500;
vector<ll> col[maxn];
long long max_weights(int n, int m, vector<int> x, vector<int> y, vector<int> w) {
	//两个情况：用i-1行还是不用
	for (int i = 0; i < m; i++) col[x[i]].push_back(i); 
	for (int i = 0; i < n; i++) {
		sort(col[i].begin(), col[i].end(), [&](int i, int j) {
			return y[i] < y[j];
		});
	}
	vector<ll> up_max(n), down_max(n), up(m), down(m);
	//up_max表示最高能拿多少，down_max相似
	//up[i] 还表示若做墙壁在第i个点最高能拿多少，down[i]相似
	for (int i = 0; i < n; i++) {
		if (col[i].size() == 0) {
			if (i == 0) up_max[i] = down_max[i] = 0;
			else up_max[i] = up_max[i - 1], down_max[i] = down_max[i - 1];
			continue;
		}
		//第一种情况：假装删除第i-1行来做
		ll mx = (i < 2 ? 0LL : max(up_max[i - 2], down_max[i - 1]));
		for (int j = 0; j < col[i].size(); j++) {
			int now = col[i][j];
			if (j == 0) up[now] = mx + w[now];
			else up[now] = up[col[i][j-1]] + w[now];
		}
		if (i > 0) {
			mx = (i < 2 ? 0LL : max(up_max[i - 2], down_max[i - 2]));
			for (int j = col[i].size() - 1; j >= 0; j--) {
				int now = col[i][j], above = (j < col[i].size() - 1 ? col[i][j + 1]: -1);
				if (above==-1) down[now] = mx + w[now];
				else down[now] = down[above] + w[now];
			}
		}
		//第二种：利用i-1行做墙壁
		if (i > 0 && col[i-1].size()) {
			int p = -1;
			for (int j = 0; j < col[i].size(); j++) {
				int now = col[i][j], below = (j >= 1 ? col[i][j - 1] : -1), x = col[i - 1].size();
				while (p<x-1 && y[col[i - 1][p + 1]] < y[now]) p++;
				if (p == -1) continue;
				if (below == -1) up[now] = max(up[now], up[col[i - 1][p]] + w[now]);
				else up[now] = max(up[now], max(up[below], up[col[i - 1][p]]) + w[now]);
			} 
			p = col[i - 1].size();
			for (int j = col[i].size() - 1; j >= 0; j--) {
				int now = col[i][j], above = (j < col[i].size() - 1 ? col[i][j + 1] : -1);
				while (p > 0 && y[col[i - 1][p - 1]] > y[now]) p--;
				if (p == col[i-1].size()) continue;
				if (above == -1) down[now] = max(down[now], down[col[i - 1][p]] + w[now]);
				else down[now] = max(down[now], max(down[above], down[col[i - 1][p]]) + w[now]);
			}
		}
		if (i == 0) {
			up_max[i] = up[col[i][col[i].size() - 1]];
			down_max[i] = down[col[i][0]];
		}
		else {
			up_max[i] = max(up_max[i-1],up[col[i][col[i].size() - 1]]);
			down_max[i] = max(down_max[i-1],down[col[i][0]]);
		}
	}
	return max(down_max[n - 1], up_max[n - 2]);
}

Compilation message

fish.cpp: In function 'long long int max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:26:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |   for (int j = 0; j < col[i].size(); j++) {
      |                   ~~^~~~~~~~~~~~~~~
fish.cpp:34:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     int now = col[i][j], above = (j < col[i].size() - 1 ? col[i][j + 1]: -1);
      |                                   ~~^~~~~~~~~~~~~~~~~~~
fish.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |    for (int j = 0; j < col[i].size(); j++) {
      |                    ~~^~~~~~~~~~~~~~~
fish.cpp:51:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     int now = col[i][j], above = (j < col[i].size() - 1 ? col[i][j + 1] : -1);
      |                                   ~~^~~~~~~~~~~~~~~~~~~
fish.cpp:53:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     if (p == col[i-1].size()) continue;
      |         ~~^~~~~~~~~~~~~~~~~~

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 7892 KB Output is correct
2 Correct 33 ms 8948 KB Output is correct
3 Correct 2 ms 4180 KB Output is correct
4 Correct 2 ms 4180 KB Output is correct
5 Correct 99 ms 18556 KB Output is correct
6 Correct 104 ms 20260 KB Output is correct

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 55 ms 11748 KB Output is correct
3 Correct 66 ms 13768 KB Output is correct
4 Correct 27 ms 8008 KB Output is correct
5 Correct 36 ms 8996 KB Output is correct
6 Correct 1 ms 2644 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 2 ms 4180 KB Output is correct
11 Correct 2 ms 4180 KB Output is correct
12 Correct 27 ms 7964 KB Output is correct
13 Correct 33 ms 9032 KB Output is correct
14 Correct 27 ms 7984 KB Output is correct
15 Correct 31 ms 8716 KB Output is correct
16 Correct 28 ms 8100 KB Output is correct
17 Correct 30 ms 8576 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 2 ms 4180 KB Output is correct
3 Correct 18 ms 7784 KB Output is correct
4 Correct 13 ms 6672 KB Output is correct
5 Correct 34 ms 11268 KB Output is correct
6 Correct 30 ms 11264 KB Output is correct
7 Correct 33 ms 11272 KB Output is correct
8 Correct 34 ms 11256 KB Output is correct

Subtask #4
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 1 ms 2644 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 2 ms 2772 KB Output is correct
11 Correct 1 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 1 ms 2644 KB Output is correct
14 Correct 1 ms 2644 KB Output is correct

Subtask #5
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 1 ms 2644 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 2 ms 2772 KB Output is correct
11 Correct 1 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 1 ms 2644 KB Output is correct
14 Correct 1 ms 2644 KB Output is correct
15 Correct 1 ms 2644 KB Output is correct
16 Correct 2 ms 2772 KB Output is correct
17 Correct 14 ms 4868 KB Output is correct
18 Correct 14 ms 5120 KB Output is correct
19 Correct 14 ms 5128 KB Output is correct
20 Correct 14 ms 5096 KB Output is correct
21 Correct 15 ms 5116 KB Output is correct
22 Correct 26 ms 7596 KB Output is correct
23 Correct 4 ms 3028 KB Output is correct
24 Correct 10 ms 4164 KB Output is correct
25 Correct 1 ms 2644 KB Output is correct
26 Correct 4 ms 3028 KB Output is correct

Subtask #6
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 1 ms 2644 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 2 ms 2772 KB Output is correct
11 Correct 1 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 1 ms 2644 KB Output is correct
14 Correct 1 ms 2644 KB Output is correct
15 Correct 1 ms 2644 KB Output is correct
16 Correct 2 ms 2772 KB Output is correct
17 Correct 14 ms 4868 KB Output is correct
18 Correct 14 ms 5120 KB Output is correct
19 Correct 14 ms 5128 KB Output is correct
20 Correct 14 ms 5096 KB Output is correct
21 Correct 15 ms 5116 KB Output is correct
22 Correct 26 ms 7596 KB Output is correct
23 Correct 4 ms 3028 KB Output is correct
24 Correct 10 ms 4164 KB Output is correct
25 Correct 1 ms 2644 KB Output is correct
26 Correct 4 ms 3028 KB Output is correct
27 Correct 2 ms 2900 KB Output is correct
28 Correct 68 ms 14324 KB Output is correct
29 Correct 97 ms 18168 KB Output is correct
30 Correct 95 ms 17820 KB Output is correct
31 Correct 96 ms 17824 KB Output is correct
32 Correct 89 ms 19244 KB Output is correct
33 Correct 98 ms 17836 KB Output is correct
34 Correct 96 ms 17824 KB Output is correct
35 Correct 36 ms 8780 KB Output is correct
36 Correct 94 ms 18740 KB Output is correct

Subtask #7
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 2 ms 4180 KB Output is correct
3 Correct 18 ms 7784 KB Output is correct
4 Correct 13 ms 6672 KB Output is correct
5 Correct 34 ms 11268 KB Output is correct
6 Correct 30 ms 11264 KB Output is correct
7 Correct 33 ms 11272 KB Output is correct
8 Correct 34 ms 11256 KB Output is correct
9 Correct 31 ms 11280 KB Output is correct
10 Correct 32 ms 8836 KB Output is correct
11 Correct 66 ms 15120 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 1 ms 2644 KB Output is correct
14 Correct 1 ms 2644 KB Output is correct
15 Correct 1 ms 2644 KB Output is correct
16 Correct 1 ms 2644 KB Output is correct
17 Correct 1 ms 2644 KB Output is correct
18 Correct 3 ms 4164 KB Output is correct
19 Correct 2 ms 4180 KB Output is correct
20 Correct 2 ms 4180 KB Output is correct
21 Correct 2 ms 4180 KB Output is correct
22 Correct 35 ms 10124 KB Output is correct
23 Correct 65 ms 15200 KB Output is correct
24 Correct 67 ms 15132 KB Output is correct

Subtask #8
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 7892 KB Output is correct
2 Correct 33 ms 8948 KB Output is correct
3 Correct 2 ms 4180 KB Output is correct
4 Correct 2 ms 4180 KB Output is correct
5 Correct 99 ms 18556 KB Output is correct
6 Correct 104 ms 20260 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 55 ms 11748 KB Output is correct
9 Correct 66 ms 13768 KB Output is correct
10 Correct 27 ms 8008 KB Output is correct
11 Correct 36 ms 8996 KB Output is correct
12 Correct 1 ms 2644 KB Output is correct
13 Correct 1 ms 2644 KB Output is correct
14 Correct 1 ms 2644 KB Output is correct
15 Correct 1 ms 2644 KB Output is correct
16 Correct 2 ms 4180 KB Output is correct
17 Correct 2 ms 4180 KB Output is correct
18 Correct 27 ms 7964 KB Output is correct
19 Correct 33 ms 9032 KB Output is correct
20 Correct 27 ms 7984 KB Output is correct
21 Correct 31 ms 8716 KB Output is correct
22 Correct 28 ms 8100 KB Output is correct
23 Correct 30 ms 8576 KB Output is correct
24 Correct 2 ms 4180 KB Output is correct
25 Correct 2 ms 4180 KB Output is correct
26 Correct 18 ms 7784 KB Output is correct
27 Correct 13 ms 6672 KB Output is correct
28 Correct 34 ms 11268 KB Output is correct
29 Correct 30 ms 11264 KB Output is correct
30 Correct 33 ms 11272 KB Output is correct
31 Correct 34 ms 11256 KB Output is correct
32 Correct 1 ms 2644 KB Output is correct
33 Correct 1 ms 2644 KB Output is correct
34 Correct 1 ms 2644 KB Output is correct
35 Correct 1 ms 2644 KB Output is correct
36 Correct 1 ms 2644 KB Output is correct
37 Correct 1 ms 2644 KB Output is correct
38 Correct 1 ms 2644 KB Output is correct
39 Correct 1 ms 2644 KB Output is correct
40 Correct 1 ms 2644 KB Output is correct
41 Correct 2 ms 2772 KB Output is correct
42 Correct 1 ms 2644 KB Output is correct
43 Correct 2 ms 2644 KB Output is correct
44 Correct 1 ms 2644 KB Output is correct
45 Correct 1 ms 2644 KB Output is correct
46 Correct 1 ms 2644 KB Output is correct
47 Correct 2 ms 2772 KB Output is correct
48 Correct 14 ms 4868 KB Output is correct
49 Correct 14 ms 5120 KB Output is correct
50 Correct 14 ms 5128 KB Output is correct
51 Correct 14 ms 5096 KB Output is correct
52 Correct 15 ms 5116 KB Output is correct
53 Correct 26 ms 7596 KB Output is correct
54 Correct 4 ms 3028 KB Output is correct
55 Correct 10 ms 4164 KB Output is correct
56 Correct 1 ms 2644 KB Output is correct
57 Correct 4 ms 3028 KB Output is correct
58 Correct 2 ms 2900 KB Output is correct
59 Correct 68 ms 14324 KB Output is correct
60 Correct 97 ms 18168 KB Output is correct
61 Correct 95 ms 17820 KB Output is correct
62 Correct 96 ms 17824 KB Output is correct
63 Correct 89 ms 19244 KB Output is correct
64 Correct 98 ms 17836 KB Output is correct
65 Correct 96 ms 17824 KB Output is correct
66 Correct 36 ms 8780 KB Output is correct
67 Correct 94 ms 18740 KB Output is correct
68 Correct 31 ms 11280 KB Output is correct
69 Correct 32 ms 8836 KB Output is correct
70 Correct 66 ms 15120 KB Output is correct
71 Correct 2 ms 2644 KB Output is correct
72 Correct 1 ms 2644 KB Output is correct
73 Correct 1 ms 2644 KB Output is correct
74 Correct 1 ms 2644 KB Output is correct
75 Correct 1 ms 2644 KB Output is correct
76 Correct 1 ms 2644 KB Output is correct
77 Correct 3 ms 4164 KB Output is correct
78 Correct 2 ms 4180 KB Output is correct
79 Correct 2 ms 4180 KB Output is correct
80 Correct 2 ms 4180 KB Output is correct
81 Correct 35 ms 10124 KB Output is correct
82 Correct 65 ms 15200 KB Output is correct
83 Correct 67 ms 15132 KB Output is correct
84 Correct 108 ms 18824 KB Output is correct
85 Correct 105 ms 18892 KB Output is correct
86 Correct 108 ms 20484 KB Output is correct
87 Correct 110 ms 20772 KB Output is correct
88 Correct 1 ms 2644 KB Output is correct
89 Correct 110 ms 20904 KB Output is correct
90 Correct 106 ms 20428 KB Output is correct
91 Correct 97 ms 20092 KB Output is correct