답안 #589759

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
589759	2022-07-05T08:41:51 Z	loctildore	Tug of War (BOI15_tug)	C++14	100 / 100	2200 ms	10892 KB

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define f first
#define s second
#define endl '\n'
#define all(x) begin(x), end(x)
int n,k,ori=600069;
int l[60069],r[60069],s[60069];
bool done[60069];
set<int> grph[60069];
bitset<600069*2> bst;
void check(int x) {
  if (done[x]) {
    return;
  }
  if (grph[x].size()==0) {
    cout<<"NO"<<endl;
    exit(0);
  }
  if (grph[x].size()!=1) {
    return;
  }
  done[x]=true;
  int i=*grph[x].begin();
  ori+=(x<n?-s[i]:s[i]);
  grph[l[i]].erase(i);
  grph[r[i]].erase(i);
  check(l[i]);
  check(r[i]);
}
int dfs(int x, int lst=-1) {
  if (done[x]) {
    return 0;
  }
  done[x]=true;
  for (auto i : grph[x]) {
    if (l[i]!=lst&&l[i]!=x) {
      return s[i]-dfs(l[i],x);
    }
    if (lst==l[i]) {
      lst=-1;
    }
    if (r[i]!=lst&&r[i]!=x) {
      return s[i]-dfs(r[i],x);
    }
    if (lst==r[i]) {
      lst=-1;
    }
  }
  return 0;
}
int main()
{
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  cin>>n>>k;
  for (int i = 0; i < 2*n; i++) {
    cin>>l[i]>>r[i]>>s[i];
    l[i]--;r[i]--;
    r[i]+=n;
    grph[l[i]].insert(i);
    grph[r[i]].insert(i);
  }
  for (int i = 0; i < 2*n; i++) {
    check(i);
  }
  bst[ori]=true;
  for (int i = 0; i < 2*n; i++) {
    if (done[i]) {
      continue;
    }
    int tmp=dfs(i);
    tmp=abs(tmp);
    bst=bst<<tmp;
    bst|=bst>>(2*tmp);
  }
  for (int i = 600069-k; i <= 600069+k; i++) {
    if (bst[i]) {
      cout<<"YES"<<endl;
      return 0;
    }
  }
  cout<<"NO"<<endl;
  return 0;
}

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	3540 KB	Output is correct
2	Correct	2 ms	3540 KB	Output is correct
3	Correct	2 ms	3540 KB	Output is correct
4	Correct	2 ms	3540 KB	Output is correct
5	Correct	3 ms	3540 KB	Output is correct
6	Correct	2 ms	3540 KB	Output is correct
7	Correct	3 ms	3540 KB	Output is correct
8	Correct	3 ms	3540 KB	Output is correct
9	Correct	3 ms	3540 KB	Output is correct
10	Correct	4 ms	3540 KB	Output is correct
11	Correct	3 ms	3540 KB	Output is correct
12	Correct	3 ms	3540 KB	Output is correct
13	Correct	3 ms	3540 KB	Output is correct
14	Correct	2 ms	3540 KB	Output is correct
15	Correct	3 ms	3540 KB	Output is correct
16	Correct	2 ms	3540 KB	Output is correct
17	Correct	3 ms	3540 KB	Output is correct
18	Correct	3 ms	3540 KB	Output is correct
19	Correct	3 ms	3540 KB	Output is correct
20	Correct	3 ms	3540 KB	Output is correct
21	Correct	2 ms	3412 KB	Output is correct
22	Correct	3 ms	3540 KB	Output is correct
23	Correct	2 ms	3540 KB	Output is correct
24	Correct	2 ms	3540 KB	Output is correct
25	Correct	3 ms	3540 KB	Output is correct

Subtask #2
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	3540 KB	Output is correct
2	Correct	2 ms	3540 KB	Output is correct
3	Correct	2 ms	3540 KB	Output is correct
4	Correct	2 ms	3540 KB	Output is correct
5	Correct	3 ms	3540 KB	Output is correct
6	Correct	2 ms	3540 KB	Output is correct
7	Correct	3 ms	3540 KB	Output is correct
8	Correct	3 ms	3540 KB	Output is correct
9	Correct	3 ms	3540 KB	Output is correct
10	Correct	4 ms	3540 KB	Output is correct
11	Correct	3 ms	3540 KB	Output is correct
12	Correct	3 ms	3540 KB	Output is correct
13	Correct	3 ms	3540 KB	Output is correct
14	Correct	2 ms	3540 KB	Output is correct
15	Correct	3 ms	3540 KB	Output is correct
16	Correct	2 ms	3540 KB	Output is correct
17	Correct	3 ms	3540 KB	Output is correct
18	Correct	3 ms	3540 KB	Output is correct
19	Correct	3 ms	3540 KB	Output is correct
20	Correct	3 ms	3540 KB	Output is correct
21	Correct	2 ms	3412 KB	Output is correct
22	Correct	3 ms	3540 KB	Output is correct
23	Correct	2 ms	3540 KB	Output is correct
24	Correct	2 ms	3540 KB	Output is correct
25	Correct	3 ms	3540 KB	Output is correct
26	Correct	137 ms	4000 KB	Output is correct
27	Correct	30 ms	3924 KB	Output is correct
28	Correct	144 ms	4000 KB	Output is correct
29	Correct	20 ms	3924 KB	Output is correct
30	Correct	153 ms	4012 KB	Output is correct
31	Correct	21 ms	3924 KB	Output is correct
32	Correct	132 ms	3924 KB	Output is correct
33	Correct	21 ms	4024 KB	Output is correct
34	Correct	19 ms	4012 KB	Output is correct
35	Correct	26 ms	4016 KB	Output is correct
36	Correct	139 ms	3924 KB	Output is correct
37	Correct	24 ms	3924 KB	Output is correct
38	Correct	127 ms	4000 KB	Output is correct
39	Correct	20 ms	4024 KB	Output is correct
40	Correct	142 ms	3996 KB	Output is correct
41	Correct	27 ms	3936 KB	Output is correct
42	Correct	141 ms	3996 KB	Output is correct
43	Correct	20 ms	4020 KB	Output is correct
44	Correct	129 ms	3996 KB	Output is correct
45	Correct	20 ms	4016 KB	Output is correct
46	Correct	134 ms	4004 KB	Output is correct
47	Correct	4 ms	3796 KB	Output is correct
48	Correct	67 ms	4020 KB	Output is correct
49	Correct	71 ms	4000 KB	Output is correct
50	Correct	148 ms	3924 KB	Output is correct
51	Correct	139 ms	3924 KB	Output is correct

Subtask #3
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	384 ms	5716 KB	Output is correct
2	Correct	10 ms	5460 KB	Output is correct
3	Correct	391 ms	5716 KB	Output is correct
4	Correct	11 ms	5460 KB	Output is correct
5	Correct	413 ms	5720 KB	Output is correct
6	Correct	10 ms	5460 KB	Output is correct
7	Correct	343 ms	5724 KB	Output is correct
8	Correct	11 ms	5520 KB	Output is correct
9	Correct	338 ms	5716 KB	Output is correct
10	Correct	9 ms	5520 KB	Output is correct
11	Correct	360 ms	5832 KB	Output is correct
12	Correct	12 ms	5460 KB	Output is correct
13	Correct	385 ms	5720 KB	Output is correct
14	Correct	319 ms	5716 KB	Output is correct
15	Correct	12 ms	5576 KB	Output is correct
16	Correct	412 ms	5716 KB	Output is correct
17	Correct	9 ms	5460 KB	Output is correct
18	Correct	323 ms	5840 KB	Output is correct
19	Correct	9 ms	5588 KB	Output is correct
20	Correct	329 ms	5716 KB	Output is correct
21	Correct	13 ms	5460 KB	Output is correct
22	Correct	199 ms	5712 KB	Output is correct

Subtask #4
29.0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	3540 KB	Output is correct
2	Correct	2 ms	3540 KB	Output is correct
3	Correct	2 ms	3540 KB	Output is correct
4	Correct	2 ms	3540 KB	Output is correct
5	Correct	3 ms	3540 KB	Output is correct
6	Correct	2 ms	3540 KB	Output is correct
7	Correct	3 ms	3540 KB	Output is correct
8	Correct	3 ms	3540 KB	Output is correct
9	Correct	3 ms	3540 KB	Output is correct
10	Correct	4 ms	3540 KB	Output is correct
11	Correct	3 ms	3540 KB	Output is correct
12	Correct	3 ms	3540 KB	Output is correct
13	Correct	3 ms	3540 KB	Output is correct
14	Correct	2 ms	3540 KB	Output is correct
15	Correct	3 ms	3540 KB	Output is correct
16	Correct	2 ms	3540 KB	Output is correct
17	Correct	3 ms	3540 KB	Output is correct
18	Correct	3 ms	3540 KB	Output is correct
19	Correct	3 ms	3540 KB	Output is correct
20	Correct	3 ms	3540 KB	Output is correct
21	Correct	2 ms	3412 KB	Output is correct
22	Correct	3 ms	3540 KB	Output is correct
23	Correct	2 ms	3540 KB	Output is correct
24	Correct	2 ms	3540 KB	Output is correct
25	Correct	3 ms	3540 KB	Output is correct
26	Correct	137 ms	4000 KB	Output is correct
27	Correct	30 ms	3924 KB	Output is correct
28	Correct	144 ms	4000 KB	Output is correct
29	Correct	20 ms	3924 KB	Output is correct
30	Correct	153 ms	4012 KB	Output is correct
31	Correct	21 ms	3924 KB	Output is correct
32	Correct	132 ms	3924 KB	Output is correct
33	Correct	21 ms	4024 KB	Output is correct
34	Correct	19 ms	4012 KB	Output is correct
35	Correct	26 ms	4016 KB	Output is correct
36	Correct	139 ms	3924 KB	Output is correct
37	Correct	24 ms	3924 KB	Output is correct
38	Correct	127 ms	4000 KB	Output is correct
39	Correct	20 ms	4024 KB	Output is correct
40	Correct	142 ms	3996 KB	Output is correct
41	Correct	27 ms	3936 KB	Output is correct
42	Correct	141 ms	3996 KB	Output is correct
43	Correct	20 ms	4020 KB	Output is correct
44	Correct	129 ms	3996 KB	Output is correct
45	Correct	20 ms	4016 KB	Output is correct
46	Correct	134 ms	4004 KB	Output is correct
47	Correct	4 ms	3796 KB	Output is correct
48	Correct	67 ms	4020 KB	Output is correct
49	Correct	71 ms	4000 KB	Output is correct
50	Correct	148 ms	3924 KB	Output is correct
51	Correct	139 ms	3924 KB	Output is correct
52	Correct	384 ms	5716 KB	Output is correct
53	Correct	10 ms	5460 KB	Output is correct
54	Correct	391 ms	5716 KB	Output is correct
55	Correct	11 ms	5460 KB	Output is correct
56	Correct	413 ms	5720 KB	Output is correct
57	Correct	10 ms	5460 KB	Output is correct
58	Correct	343 ms	5724 KB	Output is correct
59	Correct	11 ms	5520 KB	Output is correct
60	Correct	338 ms	5716 KB	Output is correct
61	Correct	9 ms	5520 KB	Output is correct
62	Correct	360 ms	5832 KB	Output is correct
63	Correct	12 ms	5460 KB	Output is correct
64	Correct	385 ms	5720 KB	Output is correct
65	Correct	319 ms	5716 KB	Output is correct
66	Correct	12 ms	5576 KB	Output is correct
67	Correct	412 ms	5716 KB	Output is correct
68	Correct	9 ms	5460 KB	Output is correct
69	Correct	323 ms	5840 KB	Output is correct
70	Correct	9 ms	5588 KB	Output is correct
71	Correct	329 ms	5716 KB	Output is correct
72	Correct	13 ms	5460 KB	Output is correct
73	Correct	199 ms	5712 KB	Output is correct
74	Correct	1980 ms	10716 KB	Output is correct
75	Correct	143 ms	10696 KB	Output is correct
76	Correct	2055 ms	10808 KB	Output is correct
77	Correct	136 ms	10764 KB	Output is correct
78	Correct	1986 ms	10776 KB	Output is correct
79	Correct	2118 ms	10876 KB	Output is correct
80	Correct	119 ms	10772 KB	Output is correct
81	Correct	141 ms	10740 KB	Output is correct
82	Correct	2040 ms	10876 KB	Output is correct
83	Correct	2068 ms	10768 KB	Output is correct
84	Correct	132 ms	10772 KB	Output is correct
85	Correct	1954 ms	10768 KB	Output is correct
86	Correct	156 ms	10748 KB	Output is correct
87	Correct	2080 ms	10884 KB	Output is correct
88	Correct	142 ms	10772 KB	Output is correct
89	Correct	1947 ms	10772 KB	Output is correct
90	Correct	143 ms	10768 KB	Output is correct
91	Correct	2165 ms	10872 KB	Output is correct
92	Correct	132 ms	10764 KB	Output is correct
93	Correct	2200 ms	10768 KB	Output is correct
94	Correct	47 ms	10464 KB	Output is correct
95	Correct	1159 ms	10764 KB	Output is correct
96	Correct	1143 ms	10760 KB	Output is correct
97	Correct	2078 ms	10768 KB	Output is correct
98	Correct	1979 ms	10892 KB	Output is correct

답안 #589759

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