답안 #127080

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
127080	2019-07-08T21:21:05 Z	TadijaSebez	Tug of War (BOI15_tug)	C++11	100 / 100	2257 ms	5624 KB

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N=60050;
vector<pair<int,int>> E[N];
bool was[N];
int n,k;
int sum[2],deg[N];
int main()
{
	int u,v,w;
	scanf("%i %i",&n,&k);
	for(int i=1;i<=2*n;i++)
	{
		scanf("%i %i %i",&u,&v,&w);
		v+=n;
		E[u].pb({v,w});
		E[v].pb({u,w});
		deg[u]++;
		deg[v]++;
	}
	queue<int> q;
	for(int i=1;i<=2*n;i++) if(deg[i]==1) q.push(i),was[i]=1;
	while(q.size())
	{
		int x=q.front();
		q.pop();
		int b=x>n;
		bool ok=0;
		for(auto e:E[x]) if(!was[e.first])
		{
			ok=1;
			v=e.first;
			w=e.second;
		}
		if(!ok || deg[v]==1) return 0*printf("NO\n");
        sum[b]+=w;
        deg[v]--;
		if(deg[v]==1) was[v]=1,q.push(v);
	}
	for(int i=1;i<=2*n;i++) if(!was[i] && deg[i]!=2) return 0*printf("NO\n");
	vector<int> cyc;
	for(int i=1;i<=2*n;i++) if(!was[i])
	{
		int all=0;
		int par=0;
		for(int x=i,t=1,y;;t=-t)
		{
			int w;
			was[x]=1;
			bool ok=0;
			for(auto e:E[x]) if(deg[e.first]==2 && e.first!=par)
			{
				y=e.first;
				w=e.second;
				ok=1;
			}
			if(!ok)
			{
				vector<int> ws;
				for(auto e:E[i]) if(deg[e.first]==2) ws.pb(e.second);
				all=ws[0]-ws[1];
				break;
			}
			all+=t*w;
			par=x;
			x=y;
			if(x==i) break;
		}
		cyc.pb(all);
	}
	/*set<int> dp;
	dp.insert(sum[1]-sum[0]);
	for(int x:cyc)
	{
		vector<int> ins;
		for(int y:dp)
		{
			ins.pb(y+x);
			ins.pb(y-x);
		}
		dp.clear();
		for(int y:ins) dp.insert(y);
	}
	int ans=1e9;
	for(int y:dp) ans=min(ans,abs(y));*/
	const int lim=N*10;
	bitset<lim> dp;
	dp[lim/2+sum[1]-sum[0]]=1;
	for(int x:cyc)
	{
		x=abs(x);
		dp=(dp>>x)|(dp<<x);
	}
	int ans=1e9;
	for(int i=0;i<N*20;i++) if(dp[i])
	{
		int x=abs(lim/2-i);
		ans=min(ans,x);
	}
	if(ans<=k) printf("YES\n");
	else printf("NO\n");
	return 0;
}

Compilation message

tug.cpp: In function 'int main()':
tug.cpp:12:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i",&n,&k);
  ~~~~~^~~~~~~~~~~~~~~
tug.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%i %i %i",&u,&v,&w);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	2168 KB	Output is correct
2	Correct	5 ms	2040 KB	Output is correct
3	Correct	6 ms	2040 KB	Output is correct
4	Correct	6 ms	2168 KB	Output is correct
5	Correct	6 ms	2172 KB	Output is correct
6	Correct	6 ms	2168 KB	Output is correct
7	Correct	6 ms	2172 KB	Output is correct
8	Correct	6 ms	2040 KB	Output is correct
9	Correct	6 ms	2040 KB	Output is correct
10	Correct	5 ms	2040 KB	Output is correct
11	Correct	5 ms	2040 KB	Output is correct
12	Correct	6 ms	2040 KB	Output is correct
13	Correct	6 ms	2040 KB	Output is correct
14	Correct	6 ms	2168 KB	Output is correct
15	Correct	6 ms	2168 KB	Output is correct
16	Correct	6 ms	2040 KB	Output is correct
17	Correct	7 ms	2168 KB	Output is correct
18	Correct	7 ms	2172 KB	Output is correct
19	Correct	6 ms	2040 KB	Output is correct
20	Correct	6 ms	2168 KB	Output is correct
21	Correct	3 ms	1784 KB	Output is correct
22	Correct	5 ms	2140 KB	Output is correct
23	Correct	8 ms	2168 KB	Output is correct
24	Correct	6 ms	2168 KB	Output is correct
25	Correct	6 ms	2168 KB	Output is correct

Subtask #2
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	2168 KB	Output is correct
2	Correct	5 ms	2040 KB	Output is correct
3	Correct	6 ms	2040 KB	Output is correct
4	Correct	6 ms	2168 KB	Output is correct
5	Correct	6 ms	2172 KB	Output is correct
6	Correct	6 ms	2168 KB	Output is correct
7	Correct	6 ms	2172 KB	Output is correct
8	Correct	6 ms	2040 KB	Output is correct
9	Correct	6 ms	2040 KB	Output is correct
10	Correct	5 ms	2040 KB	Output is correct
11	Correct	5 ms	2040 KB	Output is correct
12	Correct	6 ms	2040 KB	Output is correct
13	Correct	6 ms	2040 KB	Output is correct
14	Correct	6 ms	2168 KB	Output is correct
15	Correct	6 ms	2168 KB	Output is correct
16	Correct	6 ms	2040 KB	Output is correct
17	Correct	7 ms	2168 KB	Output is correct
18	Correct	7 ms	2172 KB	Output is correct
19	Correct	6 ms	2040 KB	Output is correct
20	Correct	6 ms	2168 KB	Output is correct
21	Correct	3 ms	1784 KB	Output is correct
22	Correct	5 ms	2140 KB	Output is correct
23	Correct	8 ms	2168 KB	Output is correct
24	Correct	6 ms	2168 KB	Output is correct
25	Correct	6 ms	2168 KB	Output is correct
26	Correct	152 ms	2396 KB	Output is correct
27	Correct	27 ms	2268 KB	Output is correct
28	Correct	150 ms	2268 KB	Output is correct
29	Correct	27 ms	2320 KB	Output is correct
30	Correct	151 ms	2296 KB	Output is correct
31	Correct	27 ms	2296 KB	Output is correct
32	Correct	152 ms	2296 KB	Output is correct
33	Correct	27 ms	2296 KB	Output is correct
34	Correct	18 ms	2296 KB	Output is correct
35	Correct	27 ms	2320 KB	Output is correct
36	Correct	152 ms	2296 KB	Output is correct
37	Correct	27 ms	2296 KB	Output is correct
38	Correct	168 ms	2424 KB	Output is correct
39	Correct	29 ms	2296 KB	Output is correct
40	Correct	153 ms	2300 KB	Output is correct
41	Correct	27 ms	2280 KB	Output is correct
42	Correct	156 ms	2172 KB	Output is correct
43	Correct	27 ms	2168 KB	Output is correct
44	Correct	154 ms	2400 KB	Output is correct
45	Correct	27 ms	2296 KB	Output is correct
46	Correct	154 ms	2172 KB	Output is correct
47	Correct	5 ms	1912 KB	Output is correct
48	Correct	83 ms	2296 KB	Output is correct
49	Correct	81 ms	2296 KB	Output is correct
50	Correct	155 ms	2296 KB	Output is correct
51	Correct	154 ms	2296 KB	Output is correct

Subtask #3
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	437 ms	3012 KB	Output is correct
2	Correct	14 ms	2680 KB	Output is correct
3	Correct	450 ms	3040 KB	Output is correct
4	Correct	14 ms	2680 KB	Output is correct
5	Correct	434 ms	2936 KB	Output is correct
6	Correct	14 ms	2552 KB	Output is correct
7	Correct	482 ms	2932 KB	Output is correct
8	Correct	15 ms	2552 KB	Output is correct
9	Correct	445 ms	3036 KB	Output is correct
10	Correct	13 ms	2552 KB	Output is correct
11	Correct	447 ms	2936 KB	Output is correct
12	Correct	13 ms	2680 KB	Output is correct
13	Correct	434 ms	3036 KB	Output is correct
14	Correct	438 ms	2936 KB	Output is correct
15	Correct	18 ms	2552 KB	Output is correct
16	Correct	456 ms	3064 KB	Output is correct
17	Correct	14 ms	2552 KB	Output is correct
18	Correct	441 ms	3064 KB	Output is correct
19	Correct	13 ms	2552 KB	Output is correct
20	Correct	438 ms	3036 KB	Output is correct
21	Correct	16 ms	2552 KB	Output is correct
22	Correct	234 ms	3092 KB	Output is correct

Subtask #4
29.0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	2168 KB	Output is correct
2	Correct	5 ms	2040 KB	Output is correct
3	Correct	6 ms	2040 KB	Output is correct
4	Correct	6 ms	2168 KB	Output is correct
5	Correct	6 ms	2172 KB	Output is correct
6	Correct	6 ms	2168 KB	Output is correct
7	Correct	6 ms	2172 KB	Output is correct
8	Correct	6 ms	2040 KB	Output is correct
9	Correct	6 ms	2040 KB	Output is correct
10	Correct	5 ms	2040 KB	Output is correct
11	Correct	5 ms	2040 KB	Output is correct
12	Correct	6 ms	2040 KB	Output is correct
13	Correct	6 ms	2040 KB	Output is correct
14	Correct	6 ms	2168 KB	Output is correct
15	Correct	6 ms	2168 KB	Output is correct
16	Correct	6 ms	2040 KB	Output is correct
17	Correct	7 ms	2168 KB	Output is correct
18	Correct	7 ms	2172 KB	Output is correct
19	Correct	6 ms	2040 KB	Output is correct
20	Correct	6 ms	2168 KB	Output is correct
21	Correct	3 ms	1784 KB	Output is correct
22	Correct	5 ms	2140 KB	Output is correct
23	Correct	8 ms	2168 KB	Output is correct
24	Correct	6 ms	2168 KB	Output is correct
25	Correct	6 ms	2168 KB	Output is correct
26	Correct	152 ms	2396 KB	Output is correct
27	Correct	27 ms	2268 KB	Output is correct
28	Correct	150 ms	2268 KB	Output is correct
29	Correct	27 ms	2320 KB	Output is correct
30	Correct	151 ms	2296 KB	Output is correct
31	Correct	27 ms	2296 KB	Output is correct
32	Correct	152 ms	2296 KB	Output is correct
33	Correct	27 ms	2296 KB	Output is correct
34	Correct	18 ms	2296 KB	Output is correct
35	Correct	27 ms	2320 KB	Output is correct
36	Correct	152 ms	2296 KB	Output is correct
37	Correct	27 ms	2296 KB	Output is correct
38	Correct	168 ms	2424 KB	Output is correct
39	Correct	29 ms	2296 KB	Output is correct
40	Correct	153 ms	2300 KB	Output is correct
41	Correct	27 ms	2280 KB	Output is correct
42	Correct	156 ms	2172 KB	Output is correct
43	Correct	27 ms	2168 KB	Output is correct
44	Correct	154 ms	2400 KB	Output is correct
45	Correct	27 ms	2296 KB	Output is correct
46	Correct	154 ms	2172 KB	Output is correct
47	Correct	5 ms	1912 KB	Output is correct
48	Correct	83 ms	2296 KB	Output is correct
49	Correct	81 ms	2296 KB	Output is correct
50	Correct	155 ms	2296 KB	Output is correct
51	Correct	154 ms	2296 KB	Output is correct
52	Correct	437 ms	3012 KB	Output is correct
53	Correct	14 ms	2680 KB	Output is correct
54	Correct	450 ms	3040 KB	Output is correct
55	Correct	14 ms	2680 KB	Output is correct
56	Correct	434 ms	2936 KB	Output is correct
57	Correct	14 ms	2552 KB	Output is correct
58	Correct	482 ms	2932 KB	Output is correct
59	Correct	15 ms	2552 KB	Output is correct
60	Correct	445 ms	3036 KB	Output is correct
61	Correct	13 ms	2552 KB	Output is correct
62	Correct	447 ms	2936 KB	Output is correct
63	Correct	13 ms	2680 KB	Output is correct
64	Correct	434 ms	3036 KB	Output is correct
65	Correct	438 ms	2936 KB	Output is correct
66	Correct	18 ms	2552 KB	Output is correct
67	Correct	456 ms	3064 KB	Output is correct
68	Correct	14 ms	2552 KB	Output is correct
69	Correct	441 ms	3064 KB	Output is correct
70	Correct	13 ms	2552 KB	Output is correct
71	Correct	438 ms	3036 KB	Output is correct
72	Correct	16 ms	2552 KB	Output is correct
73	Correct	234 ms	3092 KB	Output is correct
74	Correct	2213 ms	4544 KB	Output is correct
75	Correct	124 ms	5112 KB	Output is correct
76	Correct	2195 ms	5372 KB	Output is correct
77	Correct	123 ms	5112 KB	Output is correct
78	Correct	2225 ms	5368 KB	Output is correct
79	Correct	2220 ms	5368 KB	Output is correct
80	Correct	133 ms	5240 KB	Output is correct
81	Correct	138 ms	5240 KB	Output is correct
82	Correct	2256 ms	5340 KB	Output is correct
83	Correct	2215 ms	5368 KB	Output is correct
84	Correct	126 ms	5112 KB	Output is correct
85	Correct	2251 ms	5368 KB	Output is correct
86	Correct	121 ms	5112 KB	Output is correct
87	Correct	2203 ms	5368 KB	Output is correct
88	Correct	122 ms	5240 KB	Output is correct
89	Correct	2201 ms	5368 KB	Output is correct
90	Correct	122 ms	5112 KB	Output is correct
91	Correct	2201 ms	5368 KB	Output is correct
92	Correct	131 ms	5240 KB	Output is correct
93	Correct	2204 ms	5260 KB	Output is correct
94	Correct	37 ms	4984 KB	Output is correct
95	Correct	1123 ms	5496 KB	Output is correct
96	Correct	1125 ms	5624 KB	Output is correct
97	Correct	2257 ms	5368 KB	Output is correct
98	Correct	2251 ms	5348 KB	Output is correct

답안 #127080

Compilation message

Subtask #1 18.0 / 18.0

Subtask #2 30.0 / 30.0

Subtask #3 23.0 / 23.0

Subtask #4 29.0 / 29.0

Subtask #1
18.0 / 18.0

Subtask #2
30.0 / 30.0

Subtask #3
23.0 / 23.0

Subtask #4
29.0 / 29.0