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Submission #308251

# Submission time Handle Problem Language Result Execution time Memory
308251 2020-09-30T14:05:24 Z sofapuden Traffic (IOI10_traffic) C++14
50 / 100
 664 ms 139616 KB 
#include "traffic.h"
#include <bits/stdc++.h>

#define f first
#define s second

using namespace std;

vector<vector<int>> gra;
vector<int> we, rou;
priority_queue<pair<pair<int,int>,int>, vector<pair<pair<int,int>,int>>, greater<pair<pair<int,int>,int>>> Q;

int dfs(int x, int p, int t){
	if(t == x){
		rou.push_back(x);
		return 1;
	}
	for(auto y : gra[x]){
		if(y == p)continue;
		if(dfs(y,x,t)){
			rou.push_back(x);
			return 1;
		}
	}
	return 0;
}
		
int dfs2(int x, int p1, int p2){
	int sum = we[x];
	for(auto y : gra[x]){
		if(y == p1 || y == p2)continue;
		sum+=dfs2(y,x,x);
	}
	return sum;
}

void bfs(pair<pair<int,int>,int> node){
	for(auto x : gra[node.f.s]){
		if(node.s == x)continue;
		Q.push({{node.f.f+we[x],x},node.f.s});
	}
}

int LocateCentre(int n, int pp[], int s[], int d[]) {
	if(n == 1)return 0;
	gra.resize(n);
	for(int i = 0; i < n; ++i){
		we.push_back(pp[i]);
	}
	for(int i = 0; i < n-1; i++){
		gra[s[i]].push_back(d[i]);
		gra[d[i]].push_back(s[i]);
	}
	Q.push({{we[0],0},0});
	pair<pair<int,int>,int> firs,last;
	while(!Q.empty()){
		auto x = Q.top();
		Q.pop();
		firs = x;
		bfs(x);
	}
	Q.push({{we[firs.f.s],firs.f.s},firs.f.s});
	while(!Q.empty()){
		auto x = Q.top();
		Q.pop();
		last = x;
		bfs(x);
	}
	dfs(firs.f.s, firs.f.s, last.f.s);
	int maxi = we[rou[0]]+we[rou[(int)rou.size()-1]];
	for(int i = 1; i < (int)rou.size()-1; ++i){
		we[rou[i]] = dfs2(rou[i],rou[i-1],rou[i+1]);
		maxi+=we[rou[i]];
	} 
	pair<int,int> best = {maxi,-1};
	int c1 = 0, c2 = best.f;
	for(int i = 0; i < (int)rou.size(); ++i){
		if(i)c1+=we[rou[i-1]];
		c2-=we[rou[i]];
		if(best.f > max(c1,c2)){
			best = make_pair(min(best.f,max(c1,c2)),rou[i]);
		}
	}
	return best.s;
}

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 0 ms 384 KB Output is correct
23 Correct 1 ms 288 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 416 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 2 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 ms 384 KB Output is correct
36 Correct 2 ms 544 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 1 ms 512 KB Output is correct
40 Correct 1 ms 512 KB Output is correct
41 Correct 1 ms 512 KB Output is correct
42 Correct 1 ms 512 KB Output is correct
43 Correct 1 ms 384 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 0 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 0 ms 384 KB Output is correct
23 Correct 1 ms 288 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 416 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 2 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 ms 384 KB Output is correct
36 Correct 2 ms 544 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 1 ms 512 KB Output is correct
40 Correct 1 ms 512 KB Output is correct
41 Correct 1 ms 512 KB Output is correct
42 Correct 1 ms 512 KB Output is correct
43 Correct 1 ms 384 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 0 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 0 ms 384 KB Output is correct
49 Correct 1 ms 384 KB Output is correct
50 Correct 0 ms 384 KB Output is correct
51 Correct 0 ms 384 KB Output is correct
52 Correct 0 ms 384 KB Output is correct
53 Correct 0 ms 384 KB Output is correct
54 Correct 1 ms 384 KB Output is correct
55 Correct 0 ms 384 KB Output is correct
56 Correct 1 ms 384 KB Output is correct
57 Correct 1 ms 384 KB Output is correct
58 Correct 1 ms 384 KB Output is correct
59 Correct 0 ms 384 KB Output is correct
60 Correct 1 ms 384 KB Output is correct
61 Correct 1 ms 384 KB Output is correct
62 Correct 1 ms 384 KB Output is correct
63 Correct 1 ms 384 KB Output is correct
64 Correct 0 ms 384 KB Output is correct
65 Correct 1 ms 384 KB Output is correct
66 Correct 1 ms 384 KB Output is correct
67 Correct 1 ms 384 KB Output is correct
68 Correct 35 ms 7404 KB Output is correct
69 Correct 66 ms 14452 KB Output is correct
70 Correct 1 ms 512 KB Output is correct
71 Correct 101 ms 21920 KB Output is correct
72 Correct 131 ms 28524 KB Output is correct
73 Correct 163 ms 35180 KB Output is correct
74 Correct 201 ms 43368 KB Output is correct
75 Correct 230 ms 50024 KB Output is correct
76 Correct 262 ms 56680 KB Output is correct
77 Correct 296 ms 63396 KB Output is correct
78 Correct 328 ms 69992 KB Output is correct
79 Correct 367 ms 79712 KB Output is correct
80 Correct 391 ms 86368 KB Output is correct
81 Correct 1 ms 512 KB Output is correct
82 Correct 429 ms 93068 KB Output is correct
83 Correct 459 ms 99808 KB Output is correct
84 Correct 486 ms 106340 KB Output is correct
85 Correct 523 ms 112992 KB Output is correct
86 Correct 557 ms 119648 KB Output is correct
87 Correct 591 ms 126304 KB Output is correct
88 Correct 621 ms 133040 KB Output is correct
89 Correct 664 ms 139616 KB Output is correct
90 Correct 1 ms 256 KB Output is correct
91 Correct 0 ms 384 KB Output is correct
92 Correct 1 ms 384 KB Output is correct
93 Correct 0 ms 384 KB Output is correct
94 Correct 1 ms 384 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 0 ms 384 KB Output is correct
23 Correct 1 ms 288 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 416 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 2 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 ms 384 KB Output is correct
36 Correct 2 ms 544 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 1 ms 512 KB Output is correct
40 Correct 1 ms 512 KB Output is correct
41 Correct 1 ms 512 KB Output is correct
42 Correct 1 ms 512 KB Output is correct
43 Correct 1 ms 384 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 0 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 0 ms 384 KB Output is correct
49 Correct 0 ms 384 KB Output is correct
50 Correct 1 ms 384 KB Output is correct
51 Correct 0 ms 384 KB Output is correct
52 Correct 1 ms 384 KB Output is correct
53 Correct 1 ms 384 KB Output is correct
54 Correct 1 ms 384 KB Output is correct
55 Correct 1 ms 384 KB Output is correct
56 Correct 1 ms 384 KB Output is correct
57 Correct 1 ms 384 KB Output is correct
58 Correct 1 ms 384 KB Output is correct
59 Correct 1 ms 384 KB Output is correct
60 Correct 1 ms 384 KB Output is correct
61 Correct 1 ms 384 KB Output is correct
62 Correct 1 ms 384 KB Output is correct
63 Correct 1 ms 384 KB Output is correct
64 Correct 1 ms 384 KB Output is correct
65 Correct 1 ms 384 KB Output is correct
66 Correct 1 ms 384 KB Output is correct
67 Correct 1 ms 384 KB Output is correct
68 Correct 1 ms 384 KB Output is correct
69 Correct 1 ms 384 KB Output is correct
70 Correct 1 ms 384 KB Output is correct
71 Correct 1 ms 384 KB Output is correct
72 Incorrect 1 ms 384 KB Output isn't correct
73 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 0 ms 384 KB Output is correct
23 Correct 1 ms 288 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 416 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 2 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 ms 384 KB Output is correct
36 Correct 2 ms 544 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 1 ms 512 KB Output is correct
40 Correct 1 ms 512 KB Output is correct
41 Correct 1 ms 512 KB Output is correct
42 Correct 1 ms 512 KB Output is correct
43 Correct 1 ms 384 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 0 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 0 ms 384 KB Output is correct
49 Correct 1 ms 384 KB Output is correct
50 Correct 0 ms 384 KB Output is correct
51 Correct 0 ms 384 KB Output is correct
52 Correct 0 ms 384 KB Output is correct
53 Correct 0 ms 384 KB Output is correct
54 Correct 1 ms 384 KB Output is correct
55 Correct 0 ms 384 KB Output is correct
56 Correct 1 ms 384 KB Output is correct
57 Correct 1 ms 384 KB Output is correct
58 Correct 1 ms 384 KB Output is correct
59 Correct 0 ms 384 KB Output is correct
60 Correct 1 ms 384 KB Output is correct
61 Correct 1 ms 384 KB Output is correct
62 Correct 1 ms 384 KB Output is correct
63 Correct 1 ms 384 KB Output is correct
64 Correct 0 ms 384 KB Output is correct
65 Correct 1 ms 384 KB Output is correct
66 Correct 1 ms 384 KB Output is correct
67 Correct 1 ms 384 KB Output is correct
68 Correct 35 ms 7404 KB Output is correct
69 Correct 66 ms 14452 KB Output is correct
70 Correct 1 ms 512 KB Output is correct
71 Correct 101 ms 21920 KB Output is correct
72 Correct 131 ms 28524 KB Output is correct
73 Correct 163 ms 35180 KB Output is correct
74 Correct 201 ms 43368 KB Output is correct
75 Correct 230 ms 50024 KB Output is correct
76 Correct 262 ms 56680 KB Output is correct
77 Correct 296 ms 63396 KB Output is correct
78 Correct 328 ms 69992 KB Output is correct
79 Correct 367 ms 79712 KB Output is correct
80 Correct 391 ms 86368 KB Output is correct
81 Correct 1 ms 512 KB Output is correct
82 Correct 429 ms 93068 KB Output is correct
83 Correct 459 ms 99808 KB Output is correct
84 Correct 486 ms 106340 KB Output is correct
85 Correct 523 ms 112992 KB Output is correct
86 Correct 557 ms 119648 KB Output is correct
87 Correct 591 ms 126304 KB Output is correct
88 Correct 621 ms 133040 KB Output is correct
89 Correct 664 ms 139616 KB Output is correct
90 Correct 1 ms 256 KB Output is correct
91 Correct 0 ms 384 KB Output is correct
92 Correct 1 ms 384 KB Output is correct
93 Correct 0 ms 384 KB Output is correct
94 Correct 1 ms 384 KB Output is correct
95 Correct 0 ms 384 KB Output is correct
96 Correct 0 ms 384 KB Output is correct
97 Correct 1 ms 384 KB Output is correct
98 Correct 0 ms 384 KB Output is correct
99 Correct 1 ms 384 KB Output is correct
100 Correct 1 ms 384 KB Output is correct
101 Correct 1 ms 384 KB Output is correct
102 Correct 1 ms 384 KB Output is correct
103 Correct 1 ms 384 KB Output is correct
104 Correct 1 ms 384 KB Output is correct
105 Correct 1 ms 384 KB Output is correct
106 Correct 1 ms 384 KB Output is correct
107 Correct 1 ms 384 KB Output is correct
108 Correct 1 ms 384 KB Output is correct
109 Correct 1 ms 384 KB Output is correct
110 Correct 1 ms 384 KB Output is correct
111 Correct 1 ms 384 KB Output is correct
112 Correct 1 ms 384 KB Output is correct
113 Correct 1 ms 384 KB Output is correct
114 Correct 1 ms 384 KB Output is correct
115 Correct 1 ms 384 KB Output is correct
116 Correct 1 ms 384 KB Output is correct
117 Correct 1 ms 384 KB Output is correct
118 Correct 1 ms 384 KB Output is correct
119 Incorrect 1 ms 384 KB Output isn't correct
120 Halted 0 ms 0 KB -