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Submission #501397

# Submission time Handle Problem Language Result Execution time Memory
501397 2022-01-03T05:12:31 Z sidon Highway Tolls (IOI18_highway) C++17
100 / 100
 356 ms 11232 KB 
#include <bits/stdc++.h>
#include "highway.h"
using namespace std;
using 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(begin(a), end(a));

		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:45:44: 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]
   45 |   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 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct
3 Correct 1 ms 200 KB Output is correct
4 Correct 1 ms 200 KB Output is correct
5 Correct 0 ms 200 KB Output is correct
6 Correct 1 ms 200 KB Output is correct
7 Correct 0 ms 292 KB Output is correct
8 Correct 1 ms 200 KB Output is correct
9 Correct 0 ms 200 KB Output is correct
10 Correct 0 ms 200 KB Output is correct
11 Correct 1 ms 200 KB Output is correct
12 Correct 0 ms 200 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 328 KB Output is correct
2 Correct 14 ms 1260 KB Output is correct
3 Correct 152 ms 9332 KB Output is correct
4 Correct 168 ms 9352 KB Output is correct
5 Correct 193 ms 9424 KB Output is correct
6 Correct 101 ms 8624 KB Output is correct
7 Correct 118 ms 8500 KB Output is correct
8 Correct 189 ms 9440 KB Output is correct
9 Correct 167 ms 8560 KB Output is correct
10 Correct 125 ms 8816 KB Output is correct
11 Correct 111 ms 7948 KB Output is correct
12 Correct 241 ms 8348 KB Output is correct
13 Correct 197 ms 8780 KB Output is correct
14 Correct 204 ms 8772 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 1224 KB Output is correct
2 Correct 28 ms 1956 KB Output is correct
3 Correct 40 ms 1972 KB Output is correct
4 Correct 130 ms 7200 KB Output is correct
5 Correct 82 ms 7256 KB Output is correct
6 Correct 88 ms 8260 KB Output is correct
7 Correct 71 ms 5152 KB Output is correct
8 Correct 89 ms 7520 KB Output is correct
9 Correct 88 ms 6052 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 328 KB Output is correct
2 Correct 18 ms 1132 KB Output is correct
3 Correct 129 ms 7456 KB Output is correct
4 Correct 197 ms 9368 KB Output is correct
5 Correct 98 ms 7744 KB Output is correct
6 Correct 131 ms 8196 KB Output is correct
7 Correct 148 ms 8608 KB Output is correct
8 Correct 131 ms 8032 KB Output is correct
9 Correct 173 ms 9312 KB Output is correct
10 Correct 157 ms 8724 KB Output is correct
11 Correct 228 ms 8856 KB Output is correct
12 Correct 157 ms 8196 KB Output is correct
13 Correct 153 ms 8384 KB Output is correct
14 Correct 96 ms 7944 KB Output is correct
15 Correct 84 ms 7872 KB Output is correct
16 Correct 114 ms 7076 KB Output is correct
17 Correct 186 ms 8764 KB Output is correct
18 Correct 222 ms 8768 KB Output is correct
19 Correct 88 ms 7648 KB Output is correct
20 Correct 90 ms 7804 KB Output is correct
21 Correct 136 ms 7580 KB Output is correct
22 Correct 85 ms 6244 KB Output is correct
23 Correct 133 ms 9072 KB Output is correct
24 Correct 192 ms 8892 KB Output is correct
25 Correct 130 ms 9028 KB Output is correct

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 1264 KB Output is correct
2 Correct 15 ms 1272 KB Output is correct
3 Correct 192 ms 9704 KB Output is correct
4 Correct 256 ms 9044 KB Output is correct
5 Correct 247 ms 9700 KB Output is correct
6 Correct 235 ms 10652 KB Output is correct
7 Correct 299 ms 10376 KB Output is correct
8 Correct 261 ms 10068 KB Output is correct
9 Correct 167 ms 3876 KB Output is correct
10 Correct 183 ms 5428 KB Output is correct
11 Correct 179 ms 6616 KB Output is correct
12 Correct 184 ms 9664 KB Output is correct
13 Correct 231 ms 10080 KB Output is correct
14 Correct 272 ms 10308 KB Output is correct
15 Correct 256 ms 10920 KB Output is correct
16 Correct 164 ms 7812 KB Output is correct
17 Correct 111 ms 9116 KB Output is correct
18 Correct 137 ms 7724 KB Output is correct
19 Correct 150 ms 9272 KB Output is correct
20 Correct 141 ms 8616 KB Output is correct
21 Correct 269 ms 11232 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 1272 KB Output is correct
2 Correct 22 ms 1352 KB Output is correct
3 Correct 223 ms 9224 KB Output is correct
4 Correct 198 ms 9156 KB Output is correct
5 Correct 234 ms 9280 KB Output is correct
6 Correct 198 ms 10496 KB Output is correct
7 Correct 230 ms 9752 KB Output is correct
8 Correct 247 ms 9876 KB Output is correct
9 Correct 223 ms 9476 KB Output is correct
10 Correct 246 ms 10532 KB Output is correct
11 Correct 261 ms 10252 KB Output is correct
12 Correct 257 ms 10644 KB Output is correct
13 Correct 122 ms 4204 KB Output is correct
14 Correct 124 ms 3692 KB Output is correct
15 Correct 187 ms 7868 KB Output is correct
16 Correct 122 ms 5424 KB Output is correct
17 Correct 207 ms 6564 KB Output is correct
18 Correct 124 ms 5384 KB Output is correct
19 Correct 181 ms 9292 KB Output is correct
20 Correct 214 ms 10188 KB Output is correct
21 Correct 289 ms 10804 KB Output is correct
22 Correct 225 ms 10736 KB Output is correct
23 Correct 323 ms 10352 KB Output is correct
24 Correct 202 ms 10308 KB Output is correct
25 Correct 279 ms 9984 KB Output is correct
26 Correct 234 ms 10492 KB Output is correct
27 Correct 117 ms 8248 KB Output is correct
28 Correct 147 ms 9208 KB Output is correct
29 Correct 138 ms 9836 KB Output is correct
30 Correct 159 ms 9572 KB Output is correct
31 Correct 148 ms 9572 KB Output is correct
32 Correct 155 ms 9440 KB Output is correct
33 Correct 127 ms 9800 KB Output is correct
34 Correct 126 ms 8508 KB Output is correct
35 Correct 141 ms 8692 KB Output is correct
36 Correct 179 ms 9392 KB Output is correct
37 Correct 112 ms 9172 KB Output is correct
38 Correct 188 ms 9464 KB Output is correct
39 Correct 253 ms 11008 KB Output is correct
40 Correct 285 ms 11000 KB Output is correct
41 Correct 185 ms 11016 KB Output is correct
42 Correct 356 ms 10496 KB Output is correct