답안 #162071

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
162071	2019-11-06T08:42:42 Z	amoo_safar	Tug of War (BOI15_tug)	C++14	100 / 100	566 ms	7160 KB

#include <bits/stdc++.h>

#define pb push_back
#define F first
#define S second
#define all(x) x.begin(), x.end()

using namespace std;

typedef long long ll;
typedef long double ld;
typedef string str;
typedef pair<ll, ll> pll;

const ll Mod = 1e9 + 7;
const int Maxn = 3e4 + 10;
const ll Inf = 1000000000000000LL;

ll s[Maxn << 1], deg[Maxn << 1];

vector<pll> G[Maxn << 1];

queue<ll> q;

ll mk[Maxn << 1];
ll sm = 0, t = 1;
void DFS(ll u){
	sm += 2;
	sm -= G[u].size();
	mk[u] = t;
	for(auto adj : G[u]){
		if(mk[adj.F] == 0) DFS(adj.F);
	}
}
ll del[Maxn << 1];


vector<ll> V;
void DFS2(ll u, ll p, ll p2){
	mk[u] = 1;
	for(auto e : G[u]){
		if(del[e.F]) continue;
		if(e.F == p || e.F == p2) continue;
		V.pb(s[e.S]);
		if(!mk[e.F]) DFS2(e.F, u, p2);
	}
}


bitset<300010> bt;

int main(){
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	ll n, k;
	cin >> n >> k;
	ll l, r;
	for(int i = 0; i < n + n; i++){
		cin >> l >> r >> s[i];
		r += n;
		G[l].pb({r, i});
		G[r].pb({l, i});
		deg[l] ++;
		deg[r] ++;
	}
	for(int i = 1; i <= n + n; i++){
		if(!mk[i]){
			DFS(i);
			t ++;
			if(sm != 0) return cout << "NO", 0;
		}
	}
	
	ll S = 0;
	
	for(int i = 1; i <= n + n; i++){
		if(deg[i] == 1) q.push(i);
	}
	while(q.size()){
		ll fr = q.front(); q.pop();
		del[fr] = 1;
		for(auto e : G[fr]){
			if(del[e.F]) continue;
			if(fr > n) S -= s[e.S];
			else S += s[e.S];
			
			deg[e.F] --;
			if(deg[e.F] == 1){
				q.push(e.F);
			}
		}
	}
	//cerr << S << '\n';
	memset(mk, 0, sizeof mk);
	bt[0] = 1;
	ll A = 0;
	for(int i = 1; i <= n + n; i++){
		if(del[i] || mk[i]) continue;
		V.clear();
		DFS2(i, 0, i);
		
		ll cnt = 0;
		for(auto x : V) cnt = x - cnt;
		//cerr << cnt << '\n';
		cnt = abs(cnt);
		bt |= (bt << cnt);
		A += cnt;
	}
	for(int i = 0; i <= 300000; i++){
		if(bt[i]){
			ll res = S + i - (A - i);
			if(abs(res) <= k) return cout << "YES\n", 0;
		}
	}
	
	cout << "NO";
	return 0;
}

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2296 KB	Output is correct
2	Correct	4 ms	2296 KB	Output is correct
3	Correct	5 ms	2300 KB	Output is correct
4	Correct	4 ms	2296 KB	Output is correct
5	Correct	5 ms	2296 KB	Output is correct
6	Correct	5 ms	2296 KB	Output is correct
7	Correct	4 ms	2296 KB	Output is correct
8	Correct	4 ms	2296 KB	Output is correct
9	Correct	5 ms	2296 KB	Output is correct
10	Correct	4 ms	2296 KB	Output is correct
11	Correct	4 ms	2296 KB	Output is correct
12	Correct	4 ms	2424 KB	Output is correct
13	Correct	4 ms	2356 KB	Output is correct
14	Correct	4 ms	2300 KB	Output is correct
15	Correct	4 ms	2296 KB	Output is correct
16	Correct	5 ms	2296 KB	Output is correct
17	Correct	4 ms	2296 KB	Output is correct
18	Correct	4 ms	2296 KB	Output is correct
19	Correct	4 ms	2296 KB	Output is correct
20	Correct	4 ms	2296 KB	Output is correct
21	Correct	3 ms	1784 KB	Output is correct
22	Correct	4 ms	2296 KB	Output is correct
23	Correct	4 ms	2316 KB	Output is correct
24	Correct	4 ms	2296 KB	Output is correct
25	Correct	5 ms	2296 KB	Output is correct

Subtask #2
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2296 KB	Output is correct
2	Correct	4 ms	2296 KB	Output is correct
3	Correct	5 ms	2300 KB	Output is correct
4	Correct	4 ms	2296 KB	Output is correct
5	Correct	5 ms	2296 KB	Output is correct
6	Correct	5 ms	2296 KB	Output is correct
7	Correct	4 ms	2296 KB	Output is correct
8	Correct	4 ms	2296 KB	Output is correct
9	Correct	5 ms	2296 KB	Output is correct
10	Correct	4 ms	2296 KB	Output is correct
11	Correct	4 ms	2296 KB	Output is correct
12	Correct	4 ms	2424 KB	Output is correct
13	Correct	4 ms	2356 KB	Output is correct
14	Correct	4 ms	2300 KB	Output is correct
15	Correct	4 ms	2296 KB	Output is correct
16	Correct	5 ms	2296 KB	Output is correct
17	Correct	4 ms	2296 KB	Output is correct
18	Correct	4 ms	2296 KB	Output is correct
19	Correct	4 ms	2296 KB	Output is correct
20	Correct	4 ms	2296 KB	Output is correct
21	Correct	3 ms	1784 KB	Output is correct
22	Correct	4 ms	2296 KB	Output is correct
23	Correct	4 ms	2316 KB	Output is correct
24	Correct	4 ms	2296 KB	Output is correct
25	Correct	5 ms	2296 KB	Output is correct
26	Correct	39 ms	2712 KB	Output is correct
27	Correct	12 ms	2756 KB	Output is correct
28	Correct	39 ms	2680 KB	Output is correct
29	Correct	12 ms	2680 KB	Output is correct
30	Correct	39 ms	2716 KB	Output is correct
31	Correct	11 ms	2680 KB	Output is correct
32	Correct	52 ms	2680 KB	Output is correct
33	Correct	11 ms	2660 KB	Output is correct
34	Correct	9 ms	2680 KB	Output is correct
35	Correct	12 ms	2680 KB	Output is correct
36	Correct	39 ms	2808 KB	Output is correct
37	Correct	12 ms	2680 KB	Output is correct
38	Correct	40 ms	2716 KB	Output is correct
39	Correct	11 ms	2680 KB	Output is correct
40	Correct	38 ms	2712 KB	Output is correct
41	Correct	11 ms	2680 KB	Output is correct
42	Correct	39 ms	2680 KB	Output is correct
43	Correct	11 ms	2680 KB	Output is correct
44	Correct	38 ms	2680 KB	Output is correct
45	Correct	11 ms	2680 KB	Output is correct
46	Correct	40 ms	2680 KB	Output is correct
47	Correct	6 ms	2168 KB	Output is correct
48	Correct	23 ms	2680 KB	Output is correct
49	Correct	23 ms	2808 KB	Output is correct
50	Correct	43 ms	2680 KB	Output is correct
51	Correct	40 ms	2680 KB	Output is correct

Subtask #3
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	110 ms	3840 KB	Output is correct
2	Correct	14 ms	3440 KB	Output is correct
3	Correct	123 ms	3832 KB	Output is correct
4	Correct	14 ms	3320 KB	Output is correct
5	Correct	106 ms	3832 KB	Output is correct
6	Correct	14 ms	3448 KB	Output is correct
7	Correct	108 ms	3832 KB	Output is correct
8	Correct	15 ms	3448 KB	Output is correct
9	Correct	113 ms	3832 KB	Output is correct
10	Correct	15 ms	3448 KB	Output is correct
11	Correct	109 ms	3836 KB	Output is correct
12	Correct	14 ms	3448 KB	Output is correct
13	Correct	104 ms	3832 KB	Output is correct
14	Correct	107 ms	3832 KB	Output is correct
15	Correct	15 ms	3320 KB	Output is correct
16	Correct	110 ms	3832 KB	Output is correct
17	Correct	14 ms	3452 KB	Output is correct
18	Correct	107 ms	3832 KB	Output is correct
19	Correct	14 ms	3320 KB	Output is correct
20	Correct	107 ms	3960 KB	Output is correct
21	Correct	15 ms	3448 KB	Output is correct
22	Correct	62 ms	4092 KB	Output is correct

Subtask #4
29.0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	2296 KB	Output is correct
2	Correct	4 ms	2296 KB	Output is correct
3	Correct	5 ms	2300 KB	Output is correct
4	Correct	4 ms	2296 KB	Output is correct
5	Correct	5 ms	2296 KB	Output is correct
6	Correct	5 ms	2296 KB	Output is correct
7	Correct	4 ms	2296 KB	Output is correct
8	Correct	4 ms	2296 KB	Output is correct
9	Correct	5 ms	2296 KB	Output is correct
10	Correct	4 ms	2296 KB	Output is correct
11	Correct	4 ms	2296 KB	Output is correct
12	Correct	4 ms	2424 KB	Output is correct
13	Correct	4 ms	2356 KB	Output is correct
14	Correct	4 ms	2300 KB	Output is correct
15	Correct	4 ms	2296 KB	Output is correct
16	Correct	5 ms	2296 KB	Output is correct
17	Correct	4 ms	2296 KB	Output is correct
18	Correct	4 ms	2296 KB	Output is correct
19	Correct	4 ms	2296 KB	Output is correct
20	Correct	4 ms	2296 KB	Output is correct
21	Correct	3 ms	1784 KB	Output is correct
22	Correct	4 ms	2296 KB	Output is correct
23	Correct	4 ms	2316 KB	Output is correct
24	Correct	4 ms	2296 KB	Output is correct
25	Correct	5 ms	2296 KB	Output is correct
26	Correct	39 ms	2712 KB	Output is correct
27	Correct	12 ms	2756 KB	Output is correct
28	Correct	39 ms	2680 KB	Output is correct
29	Correct	12 ms	2680 KB	Output is correct
30	Correct	39 ms	2716 KB	Output is correct
31	Correct	11 ms	2680 KB	Output is correct
32	Correct	52 ms	2680 KB	Output is correct
33	Correct	11 ms	2660 KB	Output is correct
34	Correct	9 ms	2680 KB	Output is correct
35	Correct	12 ms	2680 KB	Output is correct
36	Correct	39 ms	2808 KB	Output is correct
37	Correct	12 ms	2680 KB	Output is correct
38	Correct	40 ms	2716 KB	Output is correct
39	Correct	11 ms	2680 KB	Output is correct
40	Correct	38 ms	2712 KB	Output is correct
41	Correct	11 ms	2680 KB	Output is correct
42	Correct	39 ms	2680 KB	Output is correct
43	Correct	11 ms	2680 KB	Output is correct
44	Correct	38 ms	2680 KB	Output is correct
45	Correct	11 ms	2680 KB	Output is correct
46	Correct	40 ms	2680 KB	Output is correct
47	Correct	6 ms	2168 KB	Output is correct
48	Correct	23 ms	2680 KB	Output is correct
49	Correct	23 ms	2808 KB	Output is correct
50	Correct	43 ms	2680 KB	Output is correct
51	Correct	40 ms	2680 KB	Output is correct
52	Correct	110 ms	3840 KB	Output is correct
53	Correct	14 ms	3440 KB	Output is correct
54	Correct	123 ms	3832 KB	Output is correct
55	Correct	14 ms	3320 KB	Output is correct
56	Correct	106 ms	3832 KB	Output is correct
57	Correct	14 ms	3448 KB	Output is correct
58	Correct	108 ms	3832 KB	Output is correct
59	Correct	15 ms	3448 KB	Output is correct
60	Correct	113 ms	3832 KB	Output is correct
61	Correct	15 ms	3448 KB	Output is correct
62	Correct	109 ms	3836 KB	Output is correct
63	Correct	14 ms	3448 KB	Output is correct
64	Correct	104 ms	3832 KB	Output is correct
65	Correct	107 ms	3832 KB	Output is correct
66	Correct	15 ms	3320 KB	Output is correct
67	Correct	110 ms	3832 KB	Output is correct
68	Correct	14 ms	3452 KB	Output is correct
69	Correct	107 ms	3832 KB	Output is correct
70	Correct	14 ms	3320 KB	Output is correct
71	Correct	107 ms	3960 KB	Output is correct
72	Correct	15 ms	3448 KB	Output is correct
73	Correct	62 ms	4092 KB	Output is correct
74	Correct	536 ms	6520 KB	Output is correct
75	Correct	81 ms	6584 KB	Output is correct
76	Correct	536 ms	6624 KB	Output is correct
77	Correct	78 ms	6648 KB	Output is correct
78	Correct	532 ms	6648 KB	Output is correct
79	Correct	543 ms	6520 KB	Output is correct
80	Correct	79 ms	6520 KB	Output is correct
81	Correct	79 ms	6548 KB	Output is correct
82	Correct	528 ms	6236 KB	Output is correct
83	Correct	553 ms	6392 KB	Output is correct
84	Correct	74 ms	6392 KB	Output is correct
85	Correct	539 ms	6416 KB	Output is correct
86	Correct	77 ms	6392 KB	Output is correct
87	Correct	545 ms	6520 KB	Output is correct
88	Correct	78 ms	6392 KB	Output is correct
89	Correct	533 ms	6392 KB	Output is correct
90	Correct	72 ms	6392 KB	Output is correct
91	Correct	566 ms	6392 KB	Output is correct
92	Correct	83 ms	6392 KB	Output is correct
93	Correct	543 ms	6392 KB	Output is correct
94	Correct	40 ms	5880 KB	Output is correct
95	Correct	297 ms	7160 KB	Output is correct
96	Correct	311 ms	7032 KB	Output is correct
97	Correct	547 ms	6392 KB	Output is correct
98	Correct	556 ms	6392 KB	Output is correct

답안 #162071

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