답안 #272383

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
272383	2020-08-18T11:38:04 Z	arnold518	Graph (BOI20_graph)	C++14	100 / 100	591 ms	19824 KB

Graph

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

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 1e5;

int N, M;
vector<pii> adj[MAXN+10];

bool vis[MAXN+10];
pii A[MAXN+10];

pii operator + (const pii &p, const pii &q) { return {p.first+q.first, p.second+q.second}; }
pii operator - (const pii &p, const pii &q) { return {p.first-q.first, p.second-q.second}; }

bool flag=true, chk;
long double val, ans[MAXN+10];
vector<int> V;

long double ffabs(long double x)
{
	if(x<0) return -x;
	return x;
}

void dfs(int now)
{
	vis[now]=true; V.push_back(now);
	for(auto nxt : adj[now])
	{
		if(vis[nxt.first])
		{
			pii t=A[now]+A[nxt.first];
			if(t.first==0)
			{
				if(t.second!=nxt.second) flag=false;
			}
			else
			{
				long double p=((long double)nxt.second-(long double)t.second)/t.first;
				if(!chk) chk=true, val=p;
				else if(ffabs(p-val)>1e-10) flag=false;
			}
		}
		else
		{
			A[nxt.first]=pii(0, nxt.second)-A[now];
			dfs(nxt.first);
		}
	}
}

long double f(long double x)
{
	long double ret=0;
	for(auto it : V) ret+=ffabs(A[it].first*x+A[it].second);
	return ret;
}

int main()
{
	scanf("%d%d", &N, &M);
	for(int i=1; i<=M; i++)
	{
		int u, v, w;
		scanf("%d%d%d", &u, &v, &w);
		adj[u].push_back({v, w});
		adj[v].push_back({u, w});
	}

	for(int i=1; i<=N; i++)
	{
		if(vis[i]) continue;
		V.clear(); chk=false;
		A[i]=pii(1, 0); dfs(i);
		if(chk)
		{
			for(auto it : V) ans[it]=A[it].first*val+A[it].second;
		}
		else
		{
			long double lo=-1e6, hi=1e6;
			for(int j=0; j<300; j++)
			{
				long double m1=(lo*2+hi)/3, m2=(lo+hi*2)/3;
				if(f(m1)<=f(m2)) hi=m2;
				else lo=m1;
			}

			for(auto it : V) ans[it]=A[it].first*lo+A[it].second;
		}
	}
	if(!flag) printf("NO\n");
	else
	{
		printf("YES\n");
		for(int i=1; i<=N; i++) printf("%.20f ", (double)ans[i]);
		printf("\n");
	}
}

Compilation message

Graph.cpp: In function 'int main()':
Graph.cpp:65:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   65 |  scanf("%d%d", &N, &M);
      |  ~~~~~^~~~~~~~~~~~~~~~
Graph.cpp:69:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   69 |   scanf("%d%d%d", &u, &v, &w);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2688 KB	answer = YES
2	Correct	2 ms	2688 KB	answer = YES
3	Correct	3 ms	2688 KB	answer = YES
4	Correct	3 ms	2688 KB	answer = NO
5	Correct	3 ms	2688 KB	answer = YES
6	Correct	2 ms	2688 KB	answer = YES
7	Correct	2 ms	2688 KB	answer = YES
8	Correct	3 ms	2688 KB	answer = YES
9	Correct	2 ms	2688 KB	answer = NO
10	Correct	3 ms	2688 KB	answer = YES
11	Correct	6 ms	2688 KB	answer = YES
12	Correct	2 ms	2688 KB	answer = NO
13	Correct	2 ms	2688 KB	answer = YES
14	Correct	2 ms	2688 KB	answer = YES
15	Correct	2 ms	2688 KB	answer = YES
16	Correct	3 ms	2688 KB	answer = YES
17	Correct	2 ms	2688 KB	answer = YES
18	Correct	3 ms	2688 KB	answer = YES
19	Correct	2 ms	2688 KB	answer = YES
20	Correct	2 ms	2688 KB	answer = YES
21	Correct	2 ms	2688 KB	answer = YES
22	Correct	2 ms	2688 KB	answer = NO
23	Correct	2 ms	2688 KB	answer = NO

Subtask #2
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2688 KB	answer = YES
2	Correct	2 ms	2688 KB	answer = YES
3	Correct	3 ms	2688 KB	answer = YES
4	Correct	3 ms	2688 KB	answer = NO
5	Correct	3 ms	2688 KB	answer = YES
6	Correct	2 ms	2688 KB	answer = YES
7	Correct	2 ms	2688 KB	answer = YES
8	Correct	3 ms	2688 KB	answer = YES
9	Correct	2 ms	2688 KB	answer = NO
10	Correct	3 ms	2688 KB	answer = YES
11	Correct	6 ms	2688 KB	answer = YES
12	Correct	2 ms	2688 KB	answer = NO
13	Correct	2 ms	2688 KB	answer = YES
14	Correct	2 ms	2688 KB	answer = YES
15	Correct	2 ms	2688 KB	answer = YES
16	Correct	3 ms	2688 KB	answer = YES
17	Correct	2 ms	2688 KB	answer = YES
18	Correct	3 ms	2688 KB	answer = YES
19	Correct	2 ms	2688 KB	answer = YES
20	Correct	2 ms	2688 KB	answer = YES
21	Correct	2 ms	2688 KB	answer = YES
22	Correct	2 ms	2688 KB	answer = NO
23	Correct	2 ms	2688 KB	answer = NO
24	Correct	3 ms	2688 KB	answer = YES
25	Correct	2 ms	2688 KB	answer = YES
26	Correct	4 ms	2688 KB	answer = YES
27	Correct	2 ms	2688 KB	answer = YES
28	Correct	2 ms	2688 KB	answer = YES
29	Correct	3 ms	2688 KB	answer = YES
30	Correct	2 ms	2688 KB	answer = NO
31	Correct	2 ms	2688 KB	answer = YES
32	Correct	2 ms	2688 KB	answer = YES
33	Correct	3 ms	2688 KB	answer = YES
34	Correct	2 ms	2688 KB	answer = YES
35	Correct	3 ms	2688 KB	answer = YES
36	Correct	3 ms	2720 KB	answer = YES

Subtask #3
17.0 / 17.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2688 KB	answer = YES
2	Correct	2 ms	2688 KB	answer = YES
3	Correct	3 ms	2688 KB	answer = YES
4	Correct	3 ms	2688 KB	answer = NO
5	Correct	3 ms	2688 KB	answer = YES
6	Correct	2 ms	2688 KB	answer = YES
7	Correct	2 ms	2688 KB	answer = YES
8	Correct	3 ms	2688 KB	answer = YES
9	Correct	2 ms	2688 KB	answer = NO
10	Correct	3 ms	2688 KB	answer = YES
11	Correct	6 ms	2688 KB	answer = YES
12	Correct	2 ms	2688 KB	answer = NO
13	Correct	2 ms	2688 KB	answer = YES
14	Correct	2 ms	2688 KB	answer = YES
15	Correct	2 ms	2688 KB	answer = YES
16	Correct	3 ms	2688 KB	answer = YES
17	Correct	2 ms	2688 KB	answer = YES
18	Correct	3 ms	2688 KB	answer = YES
19	Correct	2 ms	2688 KB	answer = YES
20	Correct	2 ms	2688 KB	answer = YES
21	Correct	2 ms	2688 KB	answer = YES
22	Correct	2 ms	2688 KB	answer = NO
23	Correct	2 ms	2688 KB	answer = NO
24	Correct	3 ms	2688 KB	answer = YES
25	Correct	2 ms	2688 KB	answer = YES
26	Correct	4 ms	2688 KB	answer = YES
27	Correct	2 ms	2688 KB	answer = YES
28	Correct	2 ms	2688 KB	answer = YES
29	Correct	3 ms	2688 KB	answer = YES
30	Correct	2 ms	2688 KB	answer = NO
31	Correct	2 ms	2688 KB	answer = YES
32	Correct	2 ms	2688 KB	answer = YES
33	Correct	3 ms	2688 KB	answer = YES
34	Correct	2 ms	2688 KB	answer = YES
35	Correct	3 ms	2688 KB	answer = YES
36	Correct	3 ms	2720 KB	answer = YES
37	Correct	4 ms	2688 KB	answer = YES
38	Correct	2 ms	2688 KB	answer = YES
39	Correct	6 ms	2688 KB	answer = YES
40	Correct	4 ms	2816 KB	answer = YES
41	Correct	4 ms	2688 KB	answer = NO
42	Correct	7 ms	2816 KB	answer = YES
43	Correct	5 ms	2816 KB	answer = YES
44	Correct	5 ms	2816 KB	answer = YES
45	Correct	3 ms	2816 KB	answer = YES
46	Correct	3 ms	2688 KB	answer = YES
47	Correct	3 ms	2816 KB	answer = YES
48	Correct	3 ms	2816 KB	answer = YES

Subtask #4
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2688 KB	answer = YES
2	Correct	2 ms	2688 KB	answer = YES
3	Correct	3 ms	2688 KB	answer = YES
4	Correct	3 ms	2688 KB	answer = NO
5	Correct	3 ms	2688 KB	answer = YES
6	Correct	2 ms	2688 KB	answer = YES
7	Correct	2 ms	2688 KB	answer = YES
8	Correct	3 ms	2688 KB	answer = YES
9	Correct	2 ms	2688 KB	answer = NO
10	Correct	3 ms	2688 KB	answer = YES
11	Correct	6 ms	2688 KB	answer = YES
12	Correct	2 ms	2688 KB	answer = NO
13	Correct	2 ms	2688 KB	answer = YES
14	Correct	2 ms	2688 KB	answer = YES
15	Correct	2 ms	2688 KB	answer = YES
16	Correct	3 ms	2688 KB	answer = YES
17	Correct	2 ms	2688 KB	answer = YES
18	Correct	3 ms	2688 KB	answer = YES
19	Correct	2 ms	2688 KB	answer = YES
20	Correct	2 ms	2688 KB	answer = YES
21	Correct	2 ms	2688 KB	answer = YES
22	Correct	2 ms	2688 KB	answer = NO
23	Correct	2 ms	2688 KB	answer = NO
24	Correct	3 ms	2688 KB	answer = YES
25	Correct	2 ms	2688 KB	answer = YES
26	Correct	4 ms	2688 KB	answer = YES
27	Correct	2 ms	2688 KB	answer = YES
28	Correct	2 ms	2688 KB	answer = YES
29	Correct	3 ms	2688 KB	answer = YES
30	Correct	2 ms	2688 KB	answer = NO
31	Correct	2 ms	2688 KB	answer = YES
32	Correct	2 ms	2688 KB	answer = YES
33	Correct	3 ms	2688 KB	answer = YES
34	Correct	2 ms	2688 KB	answer = YES
35	Correct	3 ms	2688 KB	answer = YES
36	Correct	3 ms	2720 KB	answer = YES
37	Correct	4 ms	2688 KB	answer = YES
38	Correct	2 ms	2688 KB	answer = YES
39	Correct	6 ms	2688 KB	answer = YES
40	Correct	4 ms	2816 KB	answer = YES
41	Correct	4 ms	2688 KB	answer = NO
42	Correct	7 ms	2816 KB	answer = YES
43	Correct	5 ms	2816 KB	answer = YES
44	Correct	5 ms	2816 KB	answer = YES
45	Correct	3 ms	2816 KB	answer = YES
46	Correct	3 ms	2688 KB	answer = YES
47	Correct	3 ms	2816 KB	answer = YES
48	Correct	3 ms	2816 KB	answer = YES
49	Correct	49 ms	3576 KB	answer = YES
50	Correct	13 ms	3968 KB	answer = YES
51	Correct	29 ms	3840 KB	answer = YES
52	Correct	26 ms	3584 KB	answer = NO
53	Correct	6 ms	2816 KB	answer = YES
54	Correct	10 ms	2944 KB	answer = YES
55	Correct	20 ms	3200 KB	answer = YES
56	Correct	43 ms	3704 KB	answer = YES
57	Correct	36 ms	3576 KB	answer = YES
58	Correct	32 ms	3448 KB	answer = YES
59	Correct	12 ms	3584 KB	answer = YES
60	Correct	37 ms	3576 KB	answer = YES
61	Correct	8 ms	3200 KB	answer = YES
62	Correct	93 ms	8056 KB	answer = NO
63	Correct	89 ms	8056 KB	answer = YES
64	Correct	89 ms	7928 KB	answer = NO
65	Correct	93 ms	8056 KB	answer = YES
66	Correct	7 ms	2816 KB	answer = YES

Subtask #5
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2688 KB	answer = YES
2	Correct	2 ms	2688 KB	answer = YES
3	Correct	3 ms	2688 KB	answer = YES
4	Correct	3 ms	2688 KB	answer = NO
5	Correct	3 ms	2688 KB	answer = YES
6	Correct	2 ms	2688 KB	answer = YES
7	Correct	2 ms	2688 KB	answer = YES
8	Correct	3 ms	2688 KB	answer = YES
9	Correct	2 ms	2688 KB	answer = NO
10	Correct	3 ms	2688 KB	answer = YES
11	Correct	6 ms	2688 KB	answer = YES
12	Correct	2 ms	2688 KB	answer = NO
13	Correct	2 ms	2688 KB	answer = YES
14	Correct	2 ms	2688 KB	answer = YES
15	Correct	2 ms	2688 KB	answer = YES
16	Correct	3 ms	2688 KB	answer = YES
17	Correct	2 ms	2688 KB	answer = YES
18	Correct	3 ms	2688 KB	answer = YES
19	Correct	2 ms	2688 KB	answer = YES
20	Correct	2 ms	2688 KB	answer = YES
21	Correct	2 ms	2688 KB	answer = YES
22	Correct	2 ms	2688 KB	answer = NO
23	Correct	2 ms	2688 KB	answer = NO
24	Correct	3 ms	2688 KB	answer = YES
25	Correct	2 ms	2688 KB	answer = YES
26	Correct	4 ms	2688 KB	answer = YES
27	Correct	2 ms	2688 KB	answer = YES
28	Correct	2 ms	2688 KB	answer = YES
29	Correct	3 ms	2688 KB	answer = YES
30	Correct	2 ms	2688 KB	answer = NO
31	Correct	2 ms	2688 KB	answer = YES
32	Correct	2 ms	2688 KB	answer = YES
33	Correct	3 ms	2688 KB	answer = YES
34	Correct	2 ms	2688 KB	answer = YES
35	Correct	3 ms	2688 KB	answer = YES
36	Correct	3 ms	2720 KB	answer = YES
37	Correct	4 ms	2688 KB	answer = YES
38	Correct	2 ms	2688 KB	answer = YES
39	Correct	6 ms	2688 KB	answer = YES
40	Correct	4 ms	2816 KB	answer = YES
41	Correct	4 ms	2688 KB	answer = NO
42	Correct	7 ms	2816 KB	answer = YES
43	Correct	5 ms	2816 KB	answer = YES
44	Correct	5 ms	2816 KB	answer = YES
45	Correct	3 ms	2816 KB	answer = YES
46	Correct	3 ms	2688 KB	answer = YES
47	Correct	3 ms	2816 KB	answer = YES
48	Correct	3 ms	2816 KB	answer = YES
49	Correct	49 ms	3576 KB	answer = YES
50	Correct	13 ms	3968 KB	answer = YES
51	Correct	29 ms	3840 KB	answer = YES
52	Correct	26 ms	3584 KB	answer = NO
53	Correct	6 ms	2816 KB	answer = YES
54	Correct	10 ms	2944 KB	answer = YES
55	Correct	20 ms	3200 KB	answer = YES
56	Correct	43 ms	3704 KB	answer = YES
57	Correct	36 ms	3576 KB	answer = YES
58	Correct	32 ms	3448 KB	answer = YES
59	Correct	12 ms	3584 KB	answer = YES
60	Correct	37 ms	3576 KB	answer = YES
61	Correct	8 ms	3200 KB	answer = YES
62	Correct	93 ms	8056 KB	answer = NO
63	Correct	89 ms	8056 KB	answer = YES
64	Correct	89 ms	7928 KB	answer = NO
65	Correct	93 ms	8056 KB	answer = YES
66	Correct	7 ms	2816 KB	answer = YES
67	Correct	247 ms	15884 KB	answer = YES
68	Correct	215 ms	15864 KB	answer = YES
69	Correct	91 ms	15732 KB	answer = YES
70	Correct	140 ms	18928 KB	answer = YES
71	Correct	92 ms	15732 KB	answer = YES
72	Correct	591 ms	11756 KB	answer = YES
73	Correct	114 ms	13032 KB	answer = YES
74	Correct	82 ms	11640 KB	answer = YES
75	Correct	173 ms	9976 KB	answer = NO
76	Correct	58 ms	3960 KB	answer = YES
77	Correct	127 ms	5368 KB	answer = YES
78	Correct	241 ms	7156 KB	answer = YES
79	Correct	510 ms	11624 KB	answer = YES
80	Correct	246 ms	11592 KB	answer = YES
81	Correct	68 ms	12532 KB	answer = NO
82	Correct	120 ms	16884 KB	answer = YES
83	Correct	149 ms	17252 KB	answer = YES
84	Correct	384 ms	17308 KB	answer = YES
85	Correct	241 ms	17268 KB	answer = YES
86	Correct	103 ms	17268 KB	answer = YES
87	Correct	193 ms	11516 KB	answer = NO
88	Correct	181 ms	14328 KB	answer = YES
89	Correct	121 ms	11896 KB	answer = YES
90	Correct	109 ms	12020 KB	answer = YES
91	Correct	126 ms	11896 KB	answer = YES
92	Correct	55 ms	7924 KB	answer = YES
93	Correct	56 ms	8104 KB	answer = YES
94	Correct	301 ms	14836 KB	answer = NO
95	Correct	72 ms	9596 KB	answer = NO
96	Correct	245 ms	19824 KB	answer = YES
97	Correct	178 ms	14836 KB	answer = NO

답안 #272383

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 12.0 / 12.0

Subtask #3 17.0 / 17.0

Subtask #4 24.0 / 24.0

Subtask #5 42.0 / 42.0

Subtask #1
5.0 / 5.0

Subtask #2
12.0 / 12.0

Subtask #3
17.0 / 17.0

Subtask #4
24.0 / 24.0

Subtask #5
42.0 / 42.0