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답안 #296049

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
296049 2020-09-10T08:22:19 Z nafis_shifat Power Plant (JOI20_power) C++14
100 / 100
 294 ms 41140 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
using namespace std;
const int mxn=2e5+5;
const int inf=1e9;


vector<int> adj[mxn];
int dp[mxn][2]={};
int ans[mxn]={};
int tp[mxn]={};
int sz[mxn]={};
int fa[mxn]={};
void dfs1(int cur,int prev) {
	sz[cur]=(tp[cur]==1);
	fa[cur]=(tp[cur]==1);

	for(int u: adj[cur]) {
		if(u==prev) continue;
		dfs1(u,cur);
		sz[cur]+=sz[u];

		if(tp[cur]==0) {
			fa[cur]+=fa[u];
		}
	}
}




void dfs(int cur,int prev) {



	

	int mx1=0;

	int sm=0;
	int mx2=0;

	int sm2=0;

	int mx3=0;


	for(int u : adj[cur]) {
		if(u==prev)continue;

		dfs(u,cur);

		mx1=max(mx1,dp[u][0]);
		mx2=max(mx2,fa[u]);
		mx3=max(mx3,dp[u][1]);


		sm+=fa[u];
		sm2+=max(fa[u],dp[u][1]);

	}

	if(tp[cur]==0) {
		dp[cur][0]=max({mx1,mx2,sm});

		dp[cur][1]=sm2;
		ans[cur]=max(dp[cur][0],dp[cur][1]);
	} else {
		
		dp[cur][0]=max({mx2+1,mx3+1});
		dp[cur][1]=max({mx3-1,mx2-1,sm2-1,sm-1});
	
		ans[cur]=max({dp[cur][0],mx1,mx3+1,mx2+1,sm2-1,sm-1});
	}




}

int main() {
	int n;
	cin>>n;
	for(int i=1;i<n;i++) {
		int u,v;
		scanf("%d%d",&u,&v);
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	string s;
	cin>>s;

	for(int i=0;i<n;i++) tp[i+1]=s[i]-'0';

	dfs1(1,-1);
    dfs(1,-1);
    int res=0;
    for(int i=1;i<=n;i++) res=max(res,ans[i]);

    cout<<res<<endl;





}

Compilation message

power.cpp: In function 'int main()':
power.cpp:87:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   87 |   scanf("%d%d",&u,&v);
      |   ~~~~~^~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 3 ms 4992 KB Output is correct
8 Correct 3 ms 4992 KB Output is correct
9 Correct 3 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 3 ms 4992 KB Output is correct
12 Correct 3 ms 4992 KB Output is correct
13 Correct 3 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 3 ms 4992 KB Output is correct
20 Correct 3 ms 4992 KB Output is correct
21 Correct 3 ms 4992 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 3 ms 4992 KB Output is correct
8 Correct 3 ms 4992 KB Output is correct
9 Correct 3 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 3 ms 4992 KB Output is correct
12 Correct 3 ms 4992 KB Output is correct
13 Correct 3 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 3 ms 4992 KB Output is correct
20 Correct 3 ms 4992 KB Output is correct
21 Correct 3 ms 4992 KB Output is correct
22 Correct 5 ms 5120 KB Output is correct
23 Correct 4 ms 5120 KB Output is correct
24 Correct 5 ms 5120 KB Output is correct
25 Correct 5 ms 5120 KB Output is correct
26 Correct 6 ms 5120 KB Output is correct
27 Correct 4 ms 5120 KB Output is correct
28 Correct 5 ms 5120 KB Output is correct
29 Correct 4 ms 5376 KB Output is correct
30 Correct 5 ms 5376 KB Output is correct
31 Correct 5 ms 5120 KB Output is correct
32 Correct 5 ms 5208 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 5 ms 5248 KB Output is correct
40 Correct 5 ms 5248 KB Output is correct
41 Correct 5 ms 5248 KB Output is correct
42 Correct 4 ms 5248 KB Output is correct
43 Correct 5 ms 5248 KB Output is correct
44 Correct 4 ms 5248 KB Output is correct
45 Correct 5 ms 5248 KB Output is correct
46 Correct 5 ms 5248 KB Output is correct
47 Correct 6 ms 5248 KB Output is correct
48 Correct 5 ms 5248 KB Output is correct
49 Correct 5 ms 5248 KB Output is correct
50 Correct 5 ms 5248 KB Output is correct
51 Correct 5 ms 5248 KB Output is correct
52 Correct 5 ms 5120 KB Output is correct
53 Correct 5 ms 5248 KB Output is correct
54 Correct 5 ms 5248 KB Output is correct
55 Correct 5 ms 5248 KB Output is correct
56 Correct 5 ms 5120 KB Output is correct
57 Correct 5 ms 5376 KB Output is correct
58 Correct 4 ms 5248 KB Output is correct
59 Correct 4 ms 5248 KB Output is correct
60 Correct 5 ms 5248 KB Output is correct
61 Correct 4 ms 5120 KB Output is correct
62 Correct 5 ms 5376 KB Output is correct
63 Correct 5 ms 5120 KB Output is correct

Subtask #3
53.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 3 ms 4992 KB Output is correct
8 Correct 3 ms 4992 KB Output is correct
9 Correct 3 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 3 ms 4992 KB Output is correct
12 Correct 3 ms 4992 KB Output is correct
13 Correct 3 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 3 ms 4992 KB Output is correct
20 Correct 3 ms 4992 KB Output is correct
21 Correct 3 ms 4992 KB Output is correct
22 Correct 5 ms 5120 KB Output is correct
23 Correct 4 ms 5120 KB Output is correct
24 Correct 5 ms 5120 KB Output is correct
25 Correct 5 ms 5120 KB Output is correct
26 Correct 6 ms 5120 KB Output is correct
27 Correct 4 ms 5120 KB Output is correct
28 Correct 5 ms 5120 KB Output is correct
29 Correct 4 ms 5376 KB Output is correct
30 Correct 5 ms 5376 KB Output is correct
31 Correct 5 ms 5120 KB Output is correct
32 Correct 5 ms 5208 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 5 ms 5248 KB Output is correct
40 Correct 5 ms 5248 KB Output is correct
41 Correct 5 ms 5248 KB Output is correct
42 Correct 4 ms 5248 KB Output is correct
43 Correct 5 ms 5248 KB Output is correct
44 Correct 4 ms 5248 KB Output is correct
45 Correct 5 ms 5248 KB Output is correct
46 Correct 5 ms 5248 KB Output is correct
47 Correct 6 ms 5248 KB Output is correct
48 Correct 5 ms 5248 KB Output is correct
49 Correct 5 ms 5248 KB Output is correct
50 Correct 5 ms 5248 KB Output is correct
51 Correct 5 ms 5248 KB Output is correct
52 Correct 5 ms 5120 KB Output is correct
53 Correct 5 ms 5248 KB Output is correct
54 Correct 5 ms 5248 KB Output is correct
55 Correct 5 ms 5248 KB Output is correct
56 Correct 5 ms 5120 KB Output is correct
57 Correct 5 ms 5376 KB Output is correct
58 Correct 4 ms 5248 KB Output is correct
59 Correct 4 ms 5248 KB Output is correct
60 Correct 5 ms 5248 KB Output is correct
61 Correct 4 ms 5120 KB Output is correct
62 Correct 5 ms 5376 KB Output is correct
63 Correct 5 ms 5120 KB Output is correct
64 Correct 273 ms 19076 KB Output is correct
65 Correct 277 ms 19344 KB Output is correct
66 Correct 259 ms 19200 KB Output is correct
67 Correct 249 ms 19080 KB Output is correct
68 Correct 248 ms 19204 KB Output is correct
69 Correct 244 ms 19208 KB Output is correct
70 Correct 244 ms 19080 KB Output is correct
71 Correct 246 ms 19324 KB Output is correct
72 Correct 247 ms 19080 KB Output is correct
73 Correct 291 ms 39560 KB Output is correct
74 Correct 279 ms 39304 KB Output is correct
75 Correct 248 ms 18952 KB Output is correct
76 Correct 241 ms 19080 KB Output is correct
77 Correct 279 ms 18952 KB Output is correct
78 Correct 254 ms 19208 KB Output is correct
79 Correct 251 ms 19080 KB Output is correct
80 Correct 253 ms 18952 KB Output is correct
81 Correct 212 ms 19440 KB Output is correct
82 Correct 242 ms 19316 KB Output is correct
83 Correct 271 ms 27400 KB Output is correct
84 Correct 267 ms 30856 KB Output is correct
85 Correct 261 ms 30216 KB Output is correct
86 Correct 254 ms 21396 KB Output is correct
87 Correct 247 ms 20360 KB Output is correct
88 Correct 257 ms 20744 KB Output is correct
89 Correct 273 ms 20744 KB Output is correct
90 Correct 249 ms 20420 KB Output is correct
91 Correct 243 ms 20728 KB Output is correct
92 Correct 247 ms 21256 KB Output is correct
93 Correct 239 ms 25348 KB Output is correct
94 Correct 244 ms 28092 KB Output is correct
95 Correct 242 ms 26052 KB Output is correct
96 Correct 247 ms 23048 KB Output is correct
97 Correct 247 ms 20616 KB Output is correct
98 Correct 258 ms 19840 KB Output is correct
99 Correct 254 ms 19500 KB Output is correct
100 Correct 250 ms 24588 KB Output is correct
101 Correct 264 ms 21344 KB Output is correct
102 Correct 258 ms 20144 KB Output is correct
103 Correct 247 ms 19976 KB Output is correct
104 Correct 147 ms 20076 KB Output is correct
105 Correct 283 ms 34312 KB Output is correct
106 Correct 157 ms 19820 KB Output is correct
107 Correct 155 ms 19948 KB Output is correct
108 Correct 294 ms 40668 KB Output is correct
109 Correct 143 ms 20032 KB Output is correct
110 Correct 286 ms 41140 KB Output is correct
111 Correct 234 ms 18952 KB Output is correct