답안 #481997

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
481997	2021-10-22T15:07:22 Z	pooyashams	Tug of War (BOI15_tug)	C++17	71 / 100	195 ms	17888 KB

#include <algorithm>
#include <numeric>
#include <iostream>
#include <cstring>
#include <cmath>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <bitset>

using namespace std;
typedef long long ll;

const int maxn = 12e4+10;

bitset<maxn> dp;

vector<int> G[maxn];
int lfts[maxn];
int rits[maxn];
int strn[maxn];
set<int> conts[maxn];

bool vis[maxn];

int dfs(int v)
{
	vis[v] = true;
	int out = strn[v];
	for(int u: G[v])
	{
		if(vis[u]) continue;
		out -= dfs(u);
	}
	return out;
}

inline void die()
{
	cout << "NO" << endl;
	return exit(0);
}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n, k; cin >> n >> k;
	for(int i = 0; i < 2*n; i++)
	{
		cin >> lfts[i] >> rits[i] >> strn[i];
		lfts[i]--; rits[i]--;
		rits[i] += n;
		conts[lfts[i]].insert(i);
		conts[rits[i]].insert(i);
	}
	queue<int> theq;
	for(int i = 0; i < 2*n; i++)
	{
		if(conts[i].size() == 0)
			die();
		if(conts[i].size() == 1)
			theq.push(i);
	}
	int dsum = 0; // diff sum
	while(!theq.empty())
	{
		int t = theq.front(); theq.pop();
		int i = *conts[t].begin();
		int r =  lfts[i] + rits[i] - t;
		vis[i] = true;
		conts[t].erase(i);
		conts[r].erase(i);
		if(conts[r].size() == 0)
			die();
		if(conts[r].size() == 1)
			theq.push(r);
		dsum += strn[i] * ( (t/n) * 2 - 1  );
		//cerr << t << endl;
	}
	dsum = abs(dsum);
	for(int i = 0; i < 2*n; i++)
	{
		if(conts[i].size() != 2) continue;
		int x = *conts[i].begin();
		int y = *(++conts[i].begin());
		G[x].push_back(y);
		G[y].push_back(x);
	}
	dp[0] = true;
	int tsum = 0;
	for(int v = 0; v < 2*n; v++)
	{
		if(vis[v]) continue;
		int x = abs(dfs(v));
		//cerr << x << endl;
		dp = dp | (dp << x);
		tsum += x;
	}
	bool ans = false;
	for(int i = 0; i < maxn; i++)
	{
		if(!dp[i]) continue;
		ans = ans or (abs(tsum-i-i-dsum) <= k);
		ans = ans or (abs(tsum-i-i+dsum) <= k);
	}
	if(ans)
		cout << "YES" << endl;
	else
		die();
	return 0;
}

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	8816 KB	Output is correct
2	Correct	5 ms	8788 KB	Output is correct
3	Correct	5 ms	8780 KB	Output is correct
4	Correct	6 ms	8808 KB	Output is correct
5	Correct	5 ms	8780 KB	Output is correct
6	Correct	7 ms	8780 KB	Output is correct
7	Correct	5 ms	8812 KB	Output is correct
8	Correct	4 ms	8780 KB	Output is correct
9	Correct	4 ms	8780 KB	Output is correct
10	Correct	5 ms	8780 KB	Output is correct
11	Correct	5 ms	8812 KB	Output is correct
12	Correct	4 ms	8836 KB	Output is correct
13	Correct	5 ms	8812 KB	Output is correct
14	Correct	5 ms	8780 KB	Output is correct
15	Correct	4 ms	8780 KB	Output is correct
16	Correct	6 ms	8780 KB	Output is correct
17	Correct	5 ms	8780 KB	Output is correct
18	Correct	6 ms	8736 KB	Output is correct
19	Correct	5 ms	8784 KB	Output is correct
20	Correct	6 ms	8780 KB	Output is correct
21	Correct	6 ms	8732 KB	Output is correct
22	Correct	5 ms	8780 KB	Output is correct
23	Correct	4 ms	8780 KB	Output is correct
24	Correct	5 ms	8804 KB	Output is correct
25	Correct	5 ms	8780 KB	Output is correct

Subtask #2
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	8816 KB	Output is correct
2	Correct	5 ms	8788 KB	Output is correct
3	Correct	5 ms	8780 KB	Output is correct
4	Correct	6 ms	8808 KB	Output is correct
5	Correct	5 ms	8780 KB	Output is correct
6	Correct	7 ms	8780 KB	Output is correct
7	Correct	5 ms	8812 KB	Output is correct
8	Correct	4 ms	8780 KB	Output is correct
9	Correct	4 ms	8780 KB	Output is correct
10	Correct	5 ms	8780 KB	Output is correct
11	Correct	5 ms	8812 KB	Output is correct
12	Correct	4 ms	8836 KB	Output is correct
13	Correct	5 ms	8812 KB	Output is correct
14	Correct	5 ms	8780 KB	Output is correct
15	Correct	4 ms	8780 KB	Output is correct
16	Correct	6 ms	8780 KB	Output is correct
17	Correct	5 ms	8780 KB	Output is correct
18	Correct	6 ms	8736 KB	Output is correct
19	Correct	5 ms	8784 KB	Output is correct
20	Correct	6 ms	8780 KB	Output is correct
21	Correct	6 ms	8732 KB	Output is correct
22	Correct	5 ms	8780 KB	Output is correct
23	Correct	4 ms	8780 KB	Output is correct
24	Correct	5 ms	8804 KB	Output is correct
25	Correct	5 ms	8780 KB	Output is correct
26	Correct	17 ms	9420 KB	Output is correct
27	Correct	8 ms	9328 KB	Output is correct
28	Correct	16 ms	9424 KB	Output is correct
29	Correct	7 ms	9420 KB	Output is correct
30	Correct	16 ms	9420 KB	Output is correct
31	Correct	8 ms	9420 KB	Output is correct
32	Correct	15 ms	9428 KB	Output is correct
33	Correct	8 ms	9420 KB	Output is correct
34	Correct	7 ms	9292 KB	Output is correct
35	Correct	8 ms	9304 KB	Output is correct
36	Correct	17 ms	9420 KB	Output is correct
37	Correct	10 ms	9420 KB	Output is correct
38	Correct	15 ms	9420 KB	Output is correct
39	Correct	8 ms	9420 KB	Output is correct
40	Correct	15 ms	9420 KB	Output is correct
41	Correct	8 ms	9320 KB	Output is correct
42	Correct	15 ms	9424 KB	Output is correct
43	Correct	8 ms	9420 KB	Output is correct
44	Correct	15 ms	9328 KB	Output is correct
45	Correct	7 ms	9420 KB	Output is correct
46	Correct	15 ms	9420 KB	Output is correct
47	Correct	6 ms	9164 KB	Output is correct
48	Correct	11 ms	9292 KB	Output is correct
49	Correct	11 ms	9328 KB	Output is correct
50	Correct	16 ms	9420 KB	Output is correct
51	Correct	16 ms	9420 KB	Output is correct

Subtask #3
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	42 ms	11724 KB	Output is correct
2	Correct	16 ms	11084 KB	Output is correct
3	Correct	49 ms	11704 KB	Output is correct
4	Correct	13 ms	11124 KB	Output is correct
5	Correct	42 ms	11724 KB	Output is correct
6	Correct	17 ms	11084 KB	Output is correct
7	Correct	60 ms	11772 KB	Output is correct
8	Correct	12 ms	11084 KB	Output is correct
9	Correct	42 ms	11724 KB	Output is correct
10	Correct	12 ms	11084 KB	Output is correct
11	Correct	46 ms	11852 KB	Output is correct
12	Correct	13 ms	11084 KB	Output is correct
13	Correct	42 ms	11724 KB	Output is correct
14	Correct	42 ms	11760 KB	Output is correct
15	Correct	12 ms	11156 KB	Output is correct
16	Correct	41 ms	11724 KB	Output is correct
17	Correct	12 ms	11156 KB	Output is correct
18	Correct	44 ms	11764 KB	Output is correct
19	Correct	12 ms	11084 KB	Output is correct
20	Correct	43 ms	11724 KB	Output is correct
21	Correct	12 ms	11084 KB	Output is correct
22	Correct	29 ms	11260 KB	Output is correct

Subtask #4
0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	8816 KB	Output is correct
2	Correct	5 ms	8788 KB	Output is correct
3	Correct	5 ms	8780 KB	Output is correct
4	Correct	6 ms	8808 KB	Output is correct
5	Correct	5 ms	8780 KB	Output is correct
6	Correct	7 ms	8780 KB	Output is correct
7	Correct	5 ms	8812 KB	Output is correct
8	Correct	4 ms	8780 KB	Output is correct
9	Correct	4 ms	8780 KB	Output is correct
10	Correct	5 ms	8780 KB	Output is correct
11	Correct	5 ms	8812 KB	Output is correct
12	Correct	4 ms	8836 KB	Output is correct
13	Correct	5 ms	8812 KB	Output is correct
14	Correct	5 ms	8780 KB	Output is correct
15	Correct	4 ms	8780 KB	Output is correct
16	Correct	6 ms	8780 KB	Output is correct
17	Correct	5 ms	8780 KB	Output is correct
18	Correct	6 ms	8736 KB	Output is correct
19	Correct	5 ms	8784 KB	Output is correct
20	Correct	6 ms	8780 KB	Output is correct
21	Correct	6 ms	8732 KB	Output is correct
22	Correct	5 ms	8780 KB	Output is correct
23	Correct	4 ms	8780 KB	Output is correct
24	Correct	5 ms	8804 KB	Output is correct
25	Correct	5 ms	8780 KB	Output is correct
26	Correct	17 ms	9420 KB	Output is correct
27	Correct	8 ms	9328 KB	Output is correct
28	Correct	16 ms	9424 KB	Output is correct
29	Correct	7 ms	9420 KB	Output is correct
30	Correct	16 ms	9420 KB	Output is correct
31	Correct	8 ms	9420 KB	Output is correct
32	Correct	15 ms	9428 KB	Output is correct
33	Correct	8 ms	9420 KB	Output is correct
34	Correct	7 ms	9292 KB	Output is correct
35	Correct	8 ms	9304 KB	Output is correct
36	Correct	17 ms	9420 KB	Output is correct
37	Correct	10 ms	9420 KB	Output is correct
38	Correct	15 ms	9420 KB	Output is correct
39	Correct	8 ms	9420 KB	Output is correct
40	Correct	15 ms	9420 KB	Output is correct
41	Correct	8 ms	9320 KB	Output is correct
42	Correct	15 ms	9424 KB	Output is correct
43	Correct	8 ms	9420 KB	Output is correct
44	Correct	15 ms	9328 KB	Output is correct
45	Correct	7 ms	9420 KB	Output is correct
46	Correct	15 ms	9420 KB	Output is correct
47	Correct	6 ms	9164 KB	Output is correct
48	Correct	11 ms	9292 KB	Output is correct
49	Correct	11 ms	9328 KB	Output is correct
50	Correct	16 ms	9420 KB	Output is correct
51	Correct	16 ms	9420 KB	Output is correct
52	Correct	42 ms	11724 KB	Output is correct
53	Correct	16 ms	11084 KB	Output is correct
54	Correct	49 ms	11704 KB	Output is correct
55	Correct	13 ms	11124 KB	Output is correct
56	Correct	42 ms	11724 KB	Output is correct
57	Correct	17 ms	11084 KB	Output is correct
58	Correct	60 ms	11772 KB	Output is correct
59	Correct	12 ms	11084 KB	Output is correct
60	Correct	42 ms	11724 KB	Output is correct
61	Correct	12 ms	11084 KB	Output is correct
62	Correct	46 ms	11852 KB	Output is correct
63	Correct	13 ms	11084 KB	Output is correct
64	Correct	42 ms	11724 KB	Output is correct
65	Correct	42 ms	11760 KB	Output is correct
66	Correct	12 ms	11156 KB	Output is correct
67	Correct	41 ms	11724 KB	Output is correct
68	Correct	12 ms	11156 KB	Output is correct
69	Correct	44 ms	11764 KB	Output is correct
70	Correct	12 ms	11084 KB	Output is correct
71	Correct	43 ms	11724 KB	Output is correct
72	Correct	12 ms	11084 KB	Output is correct
73	Correct	29 ms	11260 KB	Output is correct
74	Correct	195 ms	17824 KB	Output is correct
75	Correct	64 ms	17860 KB	Output is correct
76	Correct	185 ms	17852 KB	Output is correct
77	Correct	62 ms	17864 KB	Output is correct
78	Correct	183 ms	17888 KB	Output is correct
79	Correct	180 ms	17860 KB	Output is correct
80	Correct	56 ms	17860 KB	Output is correct
81	Incorrect	72 ms	17728 KB	Output isn't correct
82	Halted	0 ms	0 KB	-

답안 #481997

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