oj.uz

Submission #306041

# Submission time Handle Problem Language Result Execution time Memory
306041 2020-09-24T10:57:47 Z TadijaSebez Power Plant (JOI20_power) C++11
100 / 100
 1116 ms 27896 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N=200050;
vector<int> E[N];
char s[N];
int sz[N],was[N];
void DFS(int u,int p){sz[u]=1;for(int v:E[u])if(!was[v]&&v!=p)DFS(v,u),sz[u]+=sz[v];}
int Find(int u,int p,int n){for(int v:E[u])if(!was[v]&&v!=p&&sz[v]*2>=n)return Find(v,u,n);return u;}
int Find(int u){DFS(u,u);u=Find(u,u,sz[u]);was[u]=1;return u;}
int ans,dp[N];
void DP(int u,int p){
	int sum=0;
	dp[u]=s[u]=='1'?1:0;
	for(int v:E[u])if(!was[v]&&v!=p){
		DP(v,u);
		sum+=dp[v];
	}
	if(s[u]=='1')dp[u]=max(dp[u],sum-1);
	else dp[u]=max(dp[u],sum);
}
void Decompose(int u){
	u=Find(u);
	int sum=0;
	for(int v:E[u])if(!was[v]){
		DP(v,u);
		if(s[u]=='1')ans=max(ans,dp[v]+1);
		sum+=dp[v];
	}
	if(s[u]=='1')ans=max(ans,sum-1),ans=max(ans,1);
	else ans=max(ans,sum);
	for(int v:E[u])if(!was[v])Decompose(v);
}
int main(){
	int n;
	scanf("%i",&n);
	for(int i=1,u,v;i<n;i++)scanf("%i %i",&u,&v),E[u].pb(v),E[v].pb(u);
	scanf("%s",s+1);
	Decompose(1);
	printf("%i\n",ans);
	return 0;
}

Compilation message

power.cpp: In function 'int main()':
power.cpp:36:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   36 |  scanf("%i",&n);
      |  ~~~~~^~~~~~~~~
power.cpp:37:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   37 |  for(int i=1,u,v;i<n;i++)scanf("%i %i",&u,&v),E[u].pb(v),E[v].pb(u);
      |                          ~~~~~^~~~~~~~~~~~~~~
power.cpp:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |  scanf("%s",s+1);
      |  ~~~~~^~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 5 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 5 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct
22 Correct 6 ms 5120 KB Output is correct
23 Correct 5 ms 5120 KB Output is correct
24 Correct 6 ms 5120 KB Output is correct
25 Correct 5 ms 5120 KB Output is correct
26 Correct 5 ms 5120 KB Output is correct
27 Correct 5 ms 5120 KB Output is correct
28 Correct 5 ms 5120 KB Output is correct
29 Correct 6 ms 5248 KB Output is correct
30 Correct 6 ms 5248 KB Output is correct
31 Correct 5 ms 5120 KB Output is correct
32 Correct 5 ms 5120 KB Output is correct
33 Correct 5 ms 5120 KB Output is correct
34 Correct 5 ms 5120 KB Output is correct
35 Correct 6 ms 5120 KB Output is correct
36 Correct 5 ms 5120 KB Output is correct
37 Correct 5 ms 5120 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 6 ms 5248 KB Output is correct
40 Correct 6 ms 5120 KB Output is correct
41 Correct 6 ms 5248 KB Output is correct
42 Correct 6 ms 5120 KB Output is correct
43 Correct 6 ms 5120 KB Output is correct
44 Correct 5 ms 5120 KB Output is correct
45 Correct 5 ms 5120 KB Output is correct
46 Correct 5 ms 5120 KB Output is correct
47 Correct 5 ms 5120 KB Output is correct
48 Correct 5 ms 5248 KB Output is correct
49 Correct 6 ms 5248 KB Output is correct
50 Correct 6 ms 5120 KB Output is correct
51 Correct 6 ms 5224 KB Output is correct
52 Correct 5 ms 5120 KB Output is correct
53 Correct 5 ms 5120 KB Output is correct
54 Correct 5 ms 5120 KB Output is correct
55 Correct 5 ms 5120 KB Output is correct
56 Correct 5 ms 5120 KB Output is correct
57 Correct 6 ms 5248 KB Output is correct
58 Correct 5 ms 5120 KB Output is correct
59 Correct 5 ms 5120 KB Output is correct
60 Correct 6 ms 5248 KB Output is correct
61 Correct 5 ms 5120 KB Output is correct
62 Correct 6 ms 5248 KB Output is correct
63 Correct 5 ms 5120 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 5 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 4 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 4 ms 4992 KB Output is correct
22 Correct 6 ms 5120 KB Output is correct
23 Correct 5 ms 5120 KB Output is correct
24 Correct 6 ms 5120 KB Output is correct
25 Correct 5 ms 5120 KB Output is correct
26 Correct 5 ms 5120 KB Output is correct
27 Correct 5 ms 5120 KB Output is correct
28 Correct 5 ms 5120 KB Output is correct
29 Correct 6 ms 5248 KB Output is correct
30 Correct 6 ms 5248 KB Output is correct
31 Correct 5 ms 5120 KB Output is correct
32 Correct 5 ms 5120 KB Output is correct
33 Correct 5 ms 5120 KB Output is correct
34 Correct 5 ms 5120 KB Output is correct
35 Correct 6 ms 5120 KB Output is correct
36 Correct 5 ms 5120 KB Output is correct
37 Correct 5 ms 5120 KB Output is correct
38 Correct 5 ms 5120 KB Output is correct
39 Correct 6 ms 5248 KB Output is correct
40 Correct 6 ms 5120 KB Output is correct
41 Correct 6 ms 5248 KB Output is correct
42 Correct 6 ms 5120 KB Output is correct
43 Correct 6 ms 5120 KB Output is correct
44 Correct 5 ms 5120 KB Output is correct
45 Correct 5 ms 5120 KB Output is correct
46 Correct 5 ms 5120 KB Output is correct
47 Correct 5 ms 5120 KB Output is correct
48 Correct 5 ms 5248 KB Output is correct
49 Correct 6 ms 5248 KB Output is correct
50 Correct 6 ms 5120 KB Output is correct
51 Correct 6 ms 5224 KB Output is correct
52 Correct 5 ms 5120 KB Output is correct
53 Correct 5 ms 5120 KB Output is correct
54 Correct 5 ms 5120 KB Output is correct
55 Correct 5 ms 5120 KB Output is correct
56 Correct 5 ms 5120 KB Output is correct
57 Correct 6 ms 5248 KB Output is correct
58 Correct 5 ms 5120 KB Output is correct
59 Correct 5 ms 5120 KB Output is correct
60 Correct 6 ms 5248 KB Output is correct
61 Correct 5 ms 5120 KB Output is correct
62 Correct 6 ms 5248 KB Output is correct
63 Correct 5 ms 5120 KB Output is correct
64 Correct 651 ms 16764 KB Output is correct
65 Correct 611 ms 16828 KB Output is correct
66 Correct 624 ms 16760 KB Output is correct
67 Correct 678 ms 16888 KB Output is correct
68 Correct 615 ms 16752 KB Output is correct
69 Correct 626 ms 16888 KB Output is correct
70 Correct 610 ms 16608 KB Output is correct
71 Correct 624 ms 16888 KB Output is correct
72 Correct 647 ms 16888 KB Output is correct
73 Correct 1116 ms 26772 KB Output is correct
74 Correct 1088 ms 26836 KB Output is correct
75 Correct 636 ms 16628 KB Output is correct
76 Correct 628 ms 16632 KB Output is correct
77 Correct 711 ms 16572 KB Output is correct
78 Correct 720 ms 16504 KB Output is correct
79 Correct 723 ms 16676 KB Output is correct
80 Correct 705 ms 16504 KB Output is correct
81 Correct 240 ms 16880 KB Output is correct
82 Correct 273 ms 16864 KB Output is correct
83 Correct 885 ms 20728 KB Output is correct
84 Correct 923 ms 22392 KB Output is correct
85 Correct 893 ms 22136 KB Output is correct
86 Correct 730 ms 17656 KB Output is correct
87 Correct 718 ms 17400 KB Output is correct
88 Correct 519 ms 17660 KB Output is correct
89 Correct 532 ms 17784 KB Output is correct
90 Correct 532 ms 17656 KB Output is correct
91 Correct 557 ms 17984 KB Output is correct
92 Correct 515 ms 18040 KB Output is correct
93 Correct 605 ms 22256 KB Output is correct
94 Correct 583 ms 23536 KB Output is correct
95 Correct 565 ms 20340 KB Output is correct
96 Correct 573 ms 19208 KB Output is correct
97 Correct 479 ms 17656 KB Output is correct
98 Correct 449 ms 17144 KB Output is correct
99 Correct 490 ms 17144 KB Output is correct
100 Correct 593 ms 19576 KB Output is correct
101 Correct 543 ms 17912 KB Output is correct
102 Correct 508 ms 17528 KB Output is correct
103 Correct 559 ms 17144 KB Output is correct
104 Correct 143 ms 17384 KB Output is correct
105 Correct 1095 ms 24440 KB Output is correct
106 Correct 150 ms 17256 KB Output is correct
107 Correct 144 ms 17260 KB Output is correct
108 Correct 1054 ms 27384 KB Output is correct
109 Correct 148 ms 17512 KB Output is correct
110 Correct 1075 ms 27896 KB Output is correct
111 Correct 454 ms 16632 KB Output is correct