답안 #341470

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
341470	2020-12-29T19:43:24 Z	ryansee	Power Plant (JOI20_power)	C++14	100 / 100	199 ms	28460 KB

power

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

#define FAST ios_base::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define eb emplace_back
#define ins insert
#define f first
#define s second
#define cbr cerr<<"hi\n"
#define mmst(x, v) memset((x), v, sizeof ((x)))
#define siz(x) ll(x.size())
#define all(x) (x).begin(), (x).end()
#define lbd(x,y) (lower_bound(all(x),y)-x.begin())
#define ubd(x,y) (upper_bound(all(x),y)-x.begin())
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());    //can be used by calling rng() or shuffle(A, A+n, rng)
inline long long rand(long long x, long long y) { return rng() % (y+1-x) + x; } //inclusivesss
string inline to_string(char c) {string s(1,c);return s;} template<typename T> inline T gcd(T a,T b){ return a==0?llabs(b):gcd(b%a,a); }

using ll=long long; 
using ld=long double;
#define FOR(i,s,e) for(ll i=s;i<=ll(e);++i)
#define DEC(i,s,e) for(ll i=s;i>=ll(e);--i)
using pi=pair<ll,ll>; using spi=pair<ll,pi>; using dpi=pair<pi,pi>; 

long long LLINF = 1e18;
int INF = 1e9+1e6;
#define MAXN (200006)
ll n, dp[MAXN][2], ans;
vector<int> v[MAXN];
string A;
void dfs(int x,int p) {
	for(auto i:v[x]) if(i^p) dfs(i, x);
	for(auto i:v[x]) if(i^p) dp[x][0] += dp[i][0];
	if(A[x-1] == '1') {
		for(auto i:v[x]) if(i^p) dp[x][1] += max(dp[i][0], dp[i][1]);
		-- dp[x][1];
		for(auto i:v[x]) if(i^p) ans = max(ans, dp[x][0] - dp[i][0] + dp[i][1] + 1);
		dp[x][1] = max(dp[x][1], dp[x][0] + 1);
	} else {
		for(auto i:v[x]) if(i^p) dp[x][1] += max(dp[i][0], dp[i][1]);
	}
}
int main() {
	FAST
	cin>>n;
	FOR(i,2,n){
		ll a,b;
		cin>>a>>b;
		v[a].eb(b), v[b].eb(a);
	}
	cin>>A;
	dfs(1, 1);
	cout<<max({dp[1][0], dp[1][1], dp[1][2], ans})<<'\n';
}

Compilation message

power.cpp: In function 'int main()':
power.cpp:54:40: warning: array subscript 2 is above array bounds of 'll [2]' {aka 'long long int [2]'} [-Warray-bounds]
   54 |  cout<<max({dp[1][0], dp[1][1], dp[1][2], ans})<<'\n';
      |                                 ~~~~~~~^

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	5100 KB	Output is correct
2	Correct	4 ms	5100 KB	Output is correct
3	Correct	4 ms	5100 KB	Output is correct
4	Correct	3 ms	5100 KB	Output is correct
5	Correct	4 ms	5100 KB	Output is correct
6	Correct	4 ms	5100 KB	Output is correct
7	Correct	4 ms	5100 KB	Output is correct
8	Correct	4 ms	5100 KB	Output is correct
9	Correct	3 ms	5100 KB	Output is correct
10	Correct	3 ms	5100 KB	Output is correct
11	Correct	3 ms	5100 KB	Output is correct
12	Correct	3 ms	5100 KB	Output is correct
13	Correct	4 ms	5100 KB	Output is correct
14	Correct	4 ms	5100 KB	Output is correct
15	Correct	4 ms	5100 KB	Output is correct
16	Correct	3 ms	5100 KB	Output is correct
17	Correct	3 ms	5100 KB	Output is correct
18	Correct	4 ms	5100 KB	Output is correct
19	Correct	3 ms	5100 KB	Output is correct
20	Correct	4 ms	5100 KB	Output is correct
21	Correct	3 ms	5100 KB	Output is correct

Subtask #2
41.0 / 41.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	5100 KB	Output is correct
2	Correct	4 ms	5100 KB	Output is correct
3	Correct	4 ms	5100 KB	Output is correct
4	Correct	3 ms	5100 KB	Output is correct
5	Correct	4 ms	5100 KB	Output is correct
6	Correct	4 ms	5100 KB	Output is correct
7	Correct	4 ms	5100 KB	Output is correct
8	Correct	4 ms	5100 KB	Output is correct
9	Correct	3 ms	5100 KB	Output is correct
10	Correct	3 ms	5100 KB	Output is correct
11	Correct	3 ms	5100 KB	Output is correct
12	Correct	3 ms	5100 KB	Output is correct
13	Correct	4 ms	5100 KB	Output is correct
14	Correct	4 ms	5100 KB	Output is correct
15	Correct	4 ms	5100 KB	Output is correct
16	Correct	3 ms	5100 KB	Output is correct
17	Correct	3 ms	5100 KB	Output is correct
18	Correct	4 ms	5100 KB	Output is correct
19	Correct	3 ms	5100 KB	Output is correct
20	Correct	4 ms	5100 KB	Output is correct
21	Correct	3 ms	5100 KB	Output is correct
22	Correct	5 ms	5100 KB	Output is correct
23	Correct	4 ms	5100 KB	Output is correct
24	Correct	5 ms	5100 KB	Output is correct
25	Correct	4 ms	5100 KB	Output is correct
26	Correct	5 ms	5100 KB	Output is correct
27	Correct	5 ms	5228 KB	Output is correct
28	Correct	4 ms	5228 KB	Output is correct
29	Correct	4 ms	5228 KB	Output is correct
30	Correct	5 ms	5228 KB	Output is correct
31	Correct	4 ms	5100 KB	Output is correct
32	Correct	4 ms	5100 KB	Output is correct
33	Correct	4 ms	5100 KB	Output is correct
34	Correct	4 ms	5100 KB	Output is correct
35	Correct	4 ms	5100 KB	Output is correct
36	Correct	4 ms	5100 KB	Output is correct
37	Correct	4 ms	5228 KB	Output is correct
38	Correct	4 ms	5228 KB	Output is correct
39	Correct	4 ms	5228 KB	Output is correct
40	Correct	4 ms	5228 KB	Output is correct
41	Correct	4 ms	5228 KB	Output is correct
42	Correct	5 ms	5228 KB	Output is correct
43	Correct	5 ms	5228 KB	Output is correct
44	Correct	4 ms	5228 KB	Output is correct
45	Correct	4 ms	5228 KB	Output is correct
46	Correct	4 ms	5228 KB	Output is correct
47	Correct	4 ms	5228 KB	Output is correct
48	Correct	4 ms	5228 KB	Output is correct
49	Correct	4 ms	5228 KB	Output is correct
50	Correct	4 ms	5228 KB	Output is correct
51	Correct	4 ms	5228 KB	Output is correct
52	Correct	4 ms	5228 KB	Output is correct
53	Correct	4 ms	5228 KB	Output is correct
54	Correct	4 ms	5228 KB	Output is correct
55	Correct	4 ms	5228 KB	Output is correct
56	Correct	4 ms	5100 KB	Output is correct
57	Correct	4 ms	5228 KB	Output is correct
58	Correct	4 ms	5356 KB	Output is correct
59	Correct	4 ms	5228 KB	Output is correct
60	Correct	4 ms	5228 KB	Output is correct
61	Correct	4 ms	5100 KB	Output is correct
62	Correct	4 ms	5228 KB	Output is correct
63	Correct	4 ms	5228 KB	Output is correct

Subtask #3
53.0 / 53.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	5100 KB	Output is correct
2	Correct	4 ms	5100 KB	Output is correct
3	Correct	4 ms	5100 KB	Output is correct
4	Correct	3 ms	5100 KB	Output is correct
5	Correct	4 ms	5100 KB	Output is correct
6	Correct	4 ms	5100 KB	Output is correct
7	Correct	4 ms	5100 KB	Output is correct
8	Correct	4 ms	5100 KB	Output is correct
9	Correct	3 ms	5100 KB	Output is correct
10	Correct	3 ms	5100 KB	Output is correct
11	Correct	3 ms	5100 KB	Output is correct
12	Correct	3 ms	5100 KB	Output is correct
13	Correct	4 ms	5100 KB	Output is correct
14	Correct	4 ms	5100 KB	Output is correct
15	Correct	4 ms	5100 KB	Output is correct
16	Correct	3 ms	5100 KB	Output is correct
17	Correct	3 ms	5100 KB	Output is correct
18	Correct	4 ms	5100 KB	Output is correct
19	Correct	3 ms	5100 KB	Output is correct
20	Correct	4 ms	5100 KB	Output is correct
21	Correct	3 ms	5100 KB	Output is correct
22	Correct	5 ms	5100 KB	Output is correct
23	Correct	4 ms	5100 KB	Output is correct
24	Correct	5 ms	5100 KB	Output is correct
25	Correct	4 ms	5100 KB	Output is correct
26	Correct	5 ms	5100 KB	Output is correct
27	Correct	5 ms	5228 KB	Output is correct
28	Correct	4 ms	5228 KB	Output is correct
29	Correct	4 ms	5228 KB	Output is correct
30	Correct	5 ms	5228 KB	Output is correct
31	Correct	4 ms	5100 KB	Output is correct
32	Correct	4 ms	5100 KB	Output is correct
33	Correct	4 ms	5100 KB	Output is correct
34	Correct	4 ms	5100 KB	Output is correct
35	Correct	4 ms	5100 KB	Output is correct
36	Correct	4 ms	5100 KB	Output is correct
37	Correct	4 ms	5228 KB	Output is correct
38	Correct	4 ms	5228 KB	Output is correct
39	Correct	4 ms	5228 KB	Output is correct
40	Correct	4 ms	5228 KB	Output is correct
41	Correct	4 ms	5228 KB	Output is correct
42	Correct	5 ms	5228 KB	Output is correct
43	Correct	5 ms	5228 KB	Output is correct
44	Correct	4 ms	5228 KB	Output is correct
45	Correct	4 ms	5228 KB	Output is correct
46	Correct	4 ms	5228 KB	Output is correct
47	Correct	4 ms	5228 KB	Output is correct
48	Correct	4 ms	5228 KB	Output is correct
49	Correct	4 ms	5228 KB	Output is correct
50	Correct	4 ms	5228 KB	Output is correct
51	Correct	4 ms	5228 KB	Output is correct
52	Correct	4 ms	5228 KB	Output is correct
53	Correct	4 ms	5228 KB	Output is correct
54	Correct	4 ms	5228 KB	Output is correct
55	Correct	4 ms	5228 KB	Output is correct
56	Correct	4 ms	5100 KB	Output is correct
57	Correct	4 ms	5228 KB	Output is correct
58	Correct	4 ms	5356 KB	Output is correct
59	Correct	4 ms	5228 KB	Output is correct
60	Correct	4 ms	5228 KB	Output is correct
61	Correct	4 ms	5100 KB	Output is correct
62	Correct	4 ms	5228 KB	Output is correct
63	Correct	4 ms	5228 KB	Output is correct
64	Correct	163 ms	17608 KB	Output is correct
65	Correct	164 ms	17580 KB	Output is correct
66	Correct	161 ms	17756 KB	Output is correct
67	Correct	164 ms	17580 KB	Output is correct
68	Correct	158 ms	17580 KB	Output is correct
69	Correct	163 ms	17704 KB	Output is correct
70	Correct	159 ms	17596 KB	Output is correct
71	Correct	159 ms	17592 KB	Output is correct
72	Correct	159 ms	17576 KB	Output is correct
73	Correct	190 ms	27692 KB	Output is correct
74	Correct	189 ms	27564 KB	Output is correct
75	Correct	163 ms	17448 KB	Output is correct
76	Correct	161 ms	17584 KB	Output is correct
77	Correct	172 ms	17448 KB	Output is correct
78	Correct	167 ms	17448 KB	Output is correct
79	Correct	167 ms	17456 KB	Output is correct
80	Correct	169 ms	17448 KB	Output is correct
81	Correct	133 ms	17892 KB	Output is correct
82	Correct	153 ms	17644 KB	Output is correct
83	Correct	199 ms	21680 KB	Output is correct
84	Correct	179 ms	23352 KB	Output is correct
85	Correct	176 ms	23096 KB	Output is correct
86	Correct	196 ms	18604 KB	Output is correct
87	Correct	170 ms	18216 KB	Output is correct
88	Correct	160 ms	18664 KB	Output is correct
89	Correct	161 ms	18744 KB	Output is correct
90	Correct	158 ms	18572 KB	Output is correct
91	Correct	151 ms	18704 KB	Output is correct
92	Correct	159 ms	19096 KB	Output is correct
93	Correct	157 ms	20860 KB	Output is correct
94	Correct	150 ms	22372 KB	Output is correct
95	Correct	146 ms	21220 KB	Output is correct
96	Correct	157 ms	19992 KB	Output is correct
97	Correct	159 ms	18564 KB	Output is correct
98	Correct	146 ms	18224 KB	Output is correct
99	Correct	153 ms	17960 KB	Output is correct
100	Correct	157 ms	20504 KB	Output is correct
101	Correct	158 ms	18856 KB	Output is correct
102	Correct	152 ms	18300 KB	Output is correct
103	Correct	166 ms	18252 KB	Output is correct
104	Correct	90 ms	15328 KB	Output is correct
105	Correct	186 ms	25132 KB	Output is correct
106	Correct	98 ms	18400 KB	Output is correct
107	Correct	100 ms	18400 KB	Output is correct
108	Correct	181 ms	28204 KB	Output is correct
109	Correct	93 ms	15328 KB	Output is correct
110	Correct	193 ms	28460 KB	Output is correct
111	Correct	150 ms	17464 KB	Output is correct

답안 #341470

Compilation message

Subtask #1 6.0 / 6.0

Subtask #2 41.0 / 41.0

Subtask #3 53.0 / 53.0

Subtask #1
6.0 / 6.0

Subtask #2
41.0 / 41.0

Subtask #3
53.0 / 53.0