답안 #1109132

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1109132	2024-11-06T05:05:36 Z	codexistent	Tug of War (BOI15_tug)	C++14	71 / 100	71 ms	9076 KB

#include <bits/stdc++.h>
using namespace std;
#define MAXN 60005

multiset<pair<int, int>> graph[MAXN];
bool visited[MAXN];
bitset<MAXN> possible;
int tot = 0, sm = 0;

void dfs(int node) {
	visited[node] = true;
	if (!graph[node].size()) return;
	int nxt, cost;
	tie(nxt, cost) = *graph[node].begin();

	tot += cost;
	if (!visited[nxt]) {
		graph[nxt].erase(graph[nxt].find({node, -cost}));
		graph[node].clear();
		dfs(nxt);
	}
}

int main() {
	int n, k;
	scanf("%d %d", &n, &k);
	for (int i = 1; i <= 2 * n; i++) {
		int l, r, s;
		scanf("%d %d %d", &l, &r, &s);
		graph[l].insert({n + r, s});
		graph[n + r].insert({l, -s});
	}

	queue<int> q;
	for (int i = 1; i <= 2 * n; i++) {
		if (graph[i].size() == 1) q.push(i);
		if (graph[i].size() == 0) return printf("NO\n"), 0;
	}
	while (q.size()) {
		int curr = q.front();
		q.pop();
		if (graph[curr].size() == 0) return printf("NO\n"), 0;
		int nxt, cost;
		tie(nxt, cost) = *graph[curr].begin();
		tot += cost;

		graph[curr].clear();
		graph[nxt].erase(graph[nxt].find({curr, -cost}));
		if (graph[nxt].size() == 1) q.push(nxt);
	}

	vector<int> items;
	if (tot) items.push_back(abs(tot));
	for (int i = 1; i <= 2 * n; i++)
		if (!visited[i] && graph[i].size()) {
			tot = 0;
			graph[i].erase(graph[i].begin());
			dfs(i);
			if (tot) items.push_back(abs(tot));
		}
	sm = accumulate(items.begin(), items.end(), 0);

	possible[0] = 1;
	for (int i : items) possible |= possible << i;
	for (int i = 0; i <= sm; i++)
		if (possible[i] && abs(2 * i - sm) <= k) return printf("YES\n"), 0;
	printf("NO\n");
	return 0;
}

Compilation message

tug.cpp: In function 'int main()':
tug.cpp:26:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |  scanf("%d %d", &n, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~~
tug.cpp:29:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |   scanf("%d %d %d", &l, &r, &s);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	3152 KB	Output is correct
2	Correct	1 ms	3152 KB	Output is correct
3	Correct	2 ms	3152 KB	Output is correct
4	Correct	1 ms	3152 KB	Output is correct
5	Correct	2 ms	3152 KB	Output is correct
6	Correct	2 ms	3152 KB	Output is correct
7	Correct	2 ms	3152 KB	Output is correct
8	Correct	2 ms	3152 KB	Output is correct
9	Correct	2 ms	3152 KB	Output is correct
10	Correct	2 ms	3152 KB	Output is correct
11	Correct	1 ms	3256 KB	Output is correct
12	Correct	2 ms	3152 KB	Output is correct
13	Correct	2 ms	3152 KB	Output is correct
14	Correct	1 ms	3152 KB	Output is correct
15	Correct	2 ms	3152 KB	Output is correct
16	Correct	2 ms	3152 KB	Output is correct
17	Correct	1 ms	3152 KB	Output is correct
18	Correct	2 ms	3152 KB	Output is correct
19	Correct	2 ms	3152 KB	Output is correct
20	Correct	2 ms	3320 KB	Output is correct
21	Correct	2 ms	3152 KB	Output is correct
22	Correct	2 ms	3152 KB	Output is correct
23	Correct	2 ms	3152 KB	Output is correct
24	Correct	2 ms	3152 KB	Output is correct
25	Correct	1 ms	3152 KB	Output is correct

Subtask #2
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	3152 KB	Output is correct
2	Correct	1 ms	3152 KB	Output is correct
3	Correct	2 ms	3152 KB	Output is correct
4	Correct	1 ms	3152 KB	Output is correct
5	Correct	2 ms	3152 KB	Output is correct
6	Correct	2 ms	3152 KB	Output is correct
7	Correct	2 ms	3152 KB	Output is correct
8	Correct	2 ms	3152 KB	Output is correct
9	Correct	2 ms	3152 KB	Output is correct
10	Correct	2 ms	3152 KB	Output is correct
11	Correct	1 ms	3256 KB	Output is correct
12	Correct	2 ms	3152 KB	Output is correct
13	Correct	2 ms	3152 KB	Output is correct
14	Correct	1 ms	3152 KB	Output is correct
15	Correct	2 ms	3152 KB	Output is correct
16	Correct	2 ms	3152 KB	Output is correct
17	Correct	1 ms	3152 KB	Output is correct
18	Correct	2 ms	3152 KB	Output is correct
19	Correct	2 ms	3152 KB	Output is correct
20	Correct	2 ms	3320 KB	Output is correct
21	Correct	2 ms	3152 KB	Output is correct
22	Correct	2 ms	3152 KB	Output is correct
23	Correct	2 ms	3152 KB	Output is correct
24	Correct	2 ms	3152 KB	Output is correct
25	Correct	1 ms	3152 KB	Output is correct
26	Correct	6 ms	3664 KB	Output is correct
27	Correct	3 ms	3664 KB	Output is correct
28	Correct	5 ms	3664 KB	Output is correct
29	Correct	3 ms	3408 KB	Output is correct
30	Correct	5 ms	3664 KB	Output is correct
31	Correct	4 ms	3664 KB	Output is correct
32	Correct	8 ms	3664 KB	Output is correct
33	Correct	4 ms	3664 KB	Output is correct
34	Correct	5 ms	3408 KB	Output is correct
35	Correct	3 ms	3408 KB	Output is correct
36	Correct	5 ms	3664 KB	Output is correct
37	Correct	3 ms	3408 KB	Output is correct
38	Correct	5 ms	3664 KB	Output is correct
39	Correct	4 ms	3664 KB	Output is correct
40	Correct	5 ms	3664 KB	Output is correct
41	Correct	3 ms	3664 KB	Output is correct
42	Correct	5 ms	3568 KB	Output is correct
43	Correct	3 ms	3408 KB	Output is correct
44	Correct	5 ms	3664 KB	Output is correct
45	Correct	4 ms	3888 KB	Output is correct
46	Correct	6 ms	3664 KB	Output is correct
47	Correct	4 ms	3408 KB	Output is correct
48	Correct	5 ms	3556 KB	Output is correct
49	Correct	5 ms	3664 KB	Output is correct
50	Correct	6 ms	3664 KB	Output is correct
51	Correct	6 ms	3664 KB	Output is correct

Subtask #3
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	4944 KB	Output is correct
2	Correct	9 ms	5152 KB	Output is correct
3	Correct	9 ms	4960 KB	Output is correct
4	Correct	9 ms	4944 KB	Output is correct
5	Correct	11 ms	4944 KB	Output is correct
6	Correct	10 ms	4944 KB	Output is correct
7	Correct	9 ms	4944 KB	Output is correct
8	Correct	11 ms	4944 KB	Output is correct
9	Correct	10 ms	4944 KB	Output is correct
10	Correct	9 ms	5112 KB	Output is correct
11	Correct	9 ms	4944 KB	Output is correct
12	Correct	9 ms	4944 KB	Output is correct
13	Correct	9 ms	4944 KB	Output is correct
14	Correct	9 ms	4944 KB	Output is correct
15	Correct	9 ms	4944 KB	Output is correct
16	Correct	10 ms	4944 KB	Output is correct
17	Correct	9 ms	4944 KB	Output is correct
18	Correct	10 ms	4984 KB	Output is correct
19	Correct	10 ms	4944 KB	Output is correct
20	Correct	9 ms	4944 KB	Output is correct
21	Correct	9 ms	4956 KB	Output is correct
22	Correct	10 ms	5200 KB	Output is correct

Subtask #4
0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	3152 KB	Output is correct
2	Correct	1 ms	3152 KB	Output is correct
3	Correct	2 ms	3152 KB	Output is correct
4	Correct	1 ms	3152 KB	Output is correct
5	Correct	2 ms	3152 KB	Output is correct
6	Correct	2 ms	3152 KB	Output is correct
7	Correct	2 ms	3152 KB	Output is correct
8	Correct	2 ms	3152 KB	Output is correct
9	Correct	2 ms	3152 KB	Output is correct
10	Correct	2 ms	3152 KB	Output is correct
11	Correct	1 ms	3256 KB	Output is correct
12	Correct	2 ms	3152 KB	Output is correct
13	Correct	2 ms	3152 KB	Output is correct
14	Correct	1 ms	3152 KB	Output is correct
15	Correct	2 ms	3152 KB	Output is correct
16	Correct	2 ms	3152 KB	Output is correct
17	Correct	1 ms	3152 KB	Output is correct
18	Correct	2 ms	3152 KB	Output is correct
19	Correct	2 ms	3152 KB	Output is correct
20	Correct	2 ms	3320 KB	Output is correct
21	Correct	2 ms	3152 KB	Output is correct
22	Correct	2 ms	3152 KB	Output is correct
23	Correct	2 ms	3152 KB	Output is correct
24	Correct	2 ms	3152 KB	Output is correct
25	Correct	1 ms	3152 KB	Output is correct
26	Correct	6 ms	3664 KB	Output is correct
27	Correct	3 ms	3664 KB	Output is correct
28	Correct	5 ms	3664 KB	Output is correct
29	Correct	3 ms	3408 KB	Output is correct
30	Correct	5 ms	3664 KB	Output is correct
31	Correct	4 ms	3664 KB	Output is correct
32	Correct	8 ms	3664 KB	Output is correct
33	Correct	4 ms	3664 KB	Output is correct
34	Correct	5 ms	3408 KB	Output is correct
35	Correct	3 ms	3408 KB	Output is correct
36	Correct	5 ms	3664 KB	Output is correct
37	Correct	3 ms	3408 KB	Output is correct
38	Correct	5 ms	3664 KB	Output is correct
39	Correct	4 ms	3664 KB	Output is correct
40	Correct	5 ms	3664 KB	Output is correct
41	Correct	3 ms	3664 KB	Output is correct
42	Correct	5 ms	3568 KB	Output is correct
43	Correct	3 ms	3408 KB	Output is correct
44	Correct	5 ms	3664 KB	Output is correct
45	Correct	4 ms	3888 KB	Output is correct
46	Correct	6 ms	3664 KB	Output is correct
47	Correct	4 ms	3408 KB	Output is correct
48	Correct	5 ms	3556 KB	Output is correct
49	Correct	5 ms	3664 KB	Output is correct
50	Correct	6 ms	3664 KB	Output is correct
51	Correct	6 ms	3664 KB	Output is correct
52	Correct	9 ms	4944 KB	Output is correct
53	Correct	9 ms	5152 KB	Output is correct
54	Correct	9 ms	4960 KB	Output is correct
55	Correct	9 ms	4944 KB	Output is correct
56	Correct	11 ms	4944 KB	Output is correct
57	Correct	10 ms	4944 KB	Output is correct
58	Correct	9 ms	4944 KB	Output is correct
59	Correct	11 ms	4944 KB	Output is correct
60	Correct	10 ms	4944 KB	Output is correct
61	Correct	9 ms	5112 KB	Output is correct
62	Correct	9 ms	4944 KB	Output is correct
63	Correct	9 ms	4944 KB	Output is correct
64	Correct	9 ms	4944 KB	Output is correct
65	Correct	9 ms	4944 KB	Output is correct
66	Correct	9 ms	4944 KB	Output is correct
67	Correct	10 ms	4944 KB	Output is correct
68	Correct	9 ms	4944 KB	Output is correct
69	Correct	10 ms	4984 KB	Output is correct
70	Correct	10 ms	4944 KB	Output is correct
71	Correct	9 ms	4944 KB	Output is correct
72	Correct	9 ms	4956 KB	Output is correct
73	Correct	10 ms	5200 KB	Output is correct
74	Correct	63 ms	9040 KB	Output is correct
75	Correct	31 ms	8776 KB	Output is correct
76	Correct	71 ms	9076 KB	Output is correct
77	Correct	32 ms	8824 KB	Output is correct
78	Incorrect	61 ms	9040 KB	Output isn't correct
79	Halted	0 ms	0 KB	-

답안 #1109132

Compilation message

Subtask #1 18.0 / 18.0

Subtask #2 30.0 / 30.0

Subtask #3 23.0 / 23.0

Subtask #4 0 / 29.0

Subtask #1
18.0 / 18.0

Subtask #2
30.0 / 30.0

Subtask #3
23.0 / 23.0

Subtask #4
0 / 29.0