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Submission #806642

# Submission time Handle Problem Language Result Execution time Memory
806642 2023-08-04T08:28:14 Z Trisanu_Das Highway Tolls (IOI18_highway) C++17
100 / 100
 209 ms 11228 KB 
#include <bits/stdc++.h>
#include "highway.h"
using namespace std;
#define ll long long
 
void find_pair(int N, vector<int> U, vector<int> V, int A, int B) {
	int M = size(U), x = 0, u, d[2][N];
	ll least = ask(vector<int> (M));
	for(int b = 1<<17; b/=2; ) if(x + b < M) {
		vector<int> w(M);
		fill(begin(w), begin(w) + x + b, 1);
		if(ask(w) == least) x |= b;
	}
 
	array<int, 2> S = {U[x], V[x]}, ans {};
	vector<array<int, 2>> g[N], a;
	for(int i = x; i < M; i++) {
		g[U[i]].push_back({V[i], i});
		g[V[i]].push_back({U[i], i});
	}
	for(int k : {0, 1}) {
		fill(d[k], d[k] + N, N);
		queue<int> q;
		d[k][S[k]] = 0;
		q.push(S[k]);
		while(!empty(q)) {
			u = q.front(); q.pop();
			for(auto &[v, e] : g[u]) if(d[k][v] > d[k][u] + 1) d[k][v] = d[k][u] + 1, q.push(v);
		}
	}
	for(int k : {0, 1}) {
		a.clear();
		for(int i = 0; i < N; i++) if(d[k][i] < d[!k][i]) a.push_back({-d[k][i], i});
		sort(a.begin(), a.end());
		for(int b = 1<<17; b/=2; ) if(ans[k] + b < size(a)) {
			vector<int> w(M);
			fill(begin(w), begin(w) + x, 1);
			for(int i = ans[k] + b; --i >= 0; ) for(auto &[v, e] : g[a[i][1]]) w[e] = 1;
			if(ask(w) == least) ans[k] |= b;
		}
		ans[k] = a[ans[k]][1];
	}
	answer(ans[0], ans[1]);
}

Compilation message

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:35:44: warning: comparison of integer expressions of different signedness: 'std::array<int, 2>::value_type' {aka 'int'} and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |   for(int b = 1<<17; b/=2; ) if(ans[k] + b < size(a)) {

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 208 KB Output is correct
5 Correct 0 ms 208 KB Output is correct
6 Correct 1 ms 208 KB Output is correct
7 Correct 0 ms 208 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 0 ms 208 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 1 ms 208 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 13 ms 1232 KB Output is correct
3 Correct 151 ms 9280 KB Output is correct
4 Correct 116 ms 9340 KB Output is correct
5 Correct 88 ms 9420 KB Output is correct
6 Correct 93 ms 8632 KB Output is correct
7 Correct 98 ms 8496 KB Output is correct
8 Correct 110 ms 9412 KB Output is correct
9 Correct 101 ms 8568 KB Output is correct
10 Correct 87 ms 8812 KB Output is correct
11 Correct 72 ms 7944 KB Output is correct
12 Correct 136 ms 8348 KB Output is correct
13 Correct 97 ms 8800 KB Output is correct
14 Correct 86 ms 8772 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 1232 KB Output is correct
2 Correct 18 ms 2000 KB Output is correct
3 Correct 54 ms 1980 KB Output is correct
4 Correct 89 ms 7220 KB Output is correct
5 Correct 82 ms 7256 KB Output is correct
6 Correct 61 ms 8248 KB Output is correct
7 Correct 71 ms 5140 KB Output is correct
8 Correct 58 ms 7524 KB Output is correct
9 Correct 75 ms 6048 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 12 ms 1220 KB Output is correct
3 Correct 77 ms 7344 KB Output is correct
4 Correct 93 ms 9384 KB Output is correct
5 Correct 74 ms 7728 KB Output is correct
6 Correct 72 ms 8040 KB Output is correct
7 Correct 98 ms 8500 KB Output is correct
8 Correct 95 ms 8036 KB Output is correct
9 Correct 119 ms 9316 KB Output is correct
10 Correct 109 ms 8692 KB Output is correct
11 Correct 103 ms 8776 KB Output is correct
12 Correct 85 ms 8204 KB Output is correct
13 Correct 112 ms 8284 KB Output is correct
14 Correct 85 ms 7948 KB Output is correct
15 Correct 125 ms 7888 KB Output is correct
16 Correct 55 ms 7092 KB Output is correct
17 Correct 111 ms 8804 KB Output is correct
18 Correct 137 ms 8772 KB Output is correct
19 Correct 78 ms 7720 KB Output is correct
20 Correct 67 ms 7724 KB Output is correct
21 Correct 66 ms 7580 KB Output is correct
22 Correct 70 ms 6252 KB Output is correct
23 Correct 94 ms 8976 KB Output is correct
24 Correct 89 ms 8908 KB Output is correct
25 Correct 90 ms 8932 KB Output is correct

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 1232 KB Output is correct
2 Correct 13 ms 1256 KB Output is correct
3 Correct 140 ms 9628 KB Output is correct
4 Correct 146 ms 8944 KB Output is correct
5 Correct 165 ms 9768 KB Output is correct
6 Correct 192 ms 10588 KB Output is correct
7 Correct 127 ms 10392 KB Output is correct
8 Correct 121 ms 10080 KB Output is correct
9 Correct 127 ms 3892 KB Output is correct
10 Correct 87 ms 5452 KB Output is correct
11 Correct 134 ms 6412 KB Output is correct
12 Correct 155 ms 9652 KB Output is correct
13 Correct 135 ms 10080 KB Output is correct
14 Correct 134 ms 10216 KB Output is correct
15 Correct 145 ms 10832 KB Output is correct
16 Correct 109 ms 7828 KB Output is correct
17 Correct 103 ms 9072 KB Output is correct
18 Correct 100 ms 7712 KB Output is correct
19 Correct 105 ms 9332 KB Output is correct
20 Correct 83 ms 8612 KB Output is correct
21 Correct 185 ms 11228 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 1232 KB Output is correct
2 Correct 13 ms 1380 KB Output is correct
3 Correct 122 ms 9184 KB Output is correct
4 Correct 146 ms 9148 KB Output is correct
5 Correct 137 ms 9284 KB Output is correct
6 Correct 145 ms 10444 KB Output is correct
7 Correct 167 ms 9664 KB Output is correct
8 Correct 131 ms 9900 KB Output is correct
9 Correct 136 ms 9500 KB Output is correct
10 Correct 119 ms 10524 KB Output is correct
11 Correct 209 ms 10240 KB Output is correct
12 Correct 182 ms 10596 KB Output is correct
13 Correct 106 ms 4232 KB Output is correct
14 Correct 71 ms 3680 KB Output is correct
15 Correct 107 ms 8012 KB Output is correct
16 Correct 78 ms 5404 KB Output is correct
17 Correct 87 ms 6532 KB Output is correct
18 Correct 91 ms 5440 KB Output is correct
19 Correct 132 ms 9296 KB Output is correct
20 Correct 149 ms 10064 KB Output is correct
21 Correct 174 ms 10812 KB Output is correct
22 Correct 128 ms 10656 KB Output is correct
23 Correct 187 ms 10328 KB Output is correct
24 Correct 129 ms 10304 KB Output is correct
25 Correct 142 ms 9932 KB Output is correct
26 Correct 150 ms 10396 KB Output is correct
27 Correct 111 ms 8360 KB Output is correct
28 Correct 75 ms 9208 KB Output is correct
29 Correct 87 ms 9792 KB Output is correct
30 Correct 94 ms 9584 KB Output is correct
31 Correct 96 ms 9544 KB Output is correct
32 Correct 96 ms 9376 KB Output is correct
33 Correct 104 ms 9860 KB Output is correct
34 Correct 88 ms 8512 KB Output is correct
35 Correct 72 ms 8744 KB Output is correct
36 Correct 102 ms 9364 KB Output is correct
37 Correct 118 ms 9172 KB Output is correct
38 Correct 85 ms 9404 KB Output is correct
39 Correct 208 ms 11004 KB Output is correct
40 Correct 176 ms 10952 KB Output is correct
41 Correct 172 ms 11088 KB Output is correct
42 Correct 195 ms 10500 KB Output is correct