oj.uz

Submission #97377

# Submission time Handle Problem Language Result Execution time Memory
97377 2019-02-15T15:24:05 Z E869120 Highway Tolls (IOI18_highway) C++14
90 / 100
 352 ms 16708 KB 
#include "highway.h"
#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
using namespace std;

int N, M, U[1 << 18], V[1 << 18], dist[1 << 18], par[1 << 18], paredge[1 << 18];
vector<pair<int, int>> G[1 << 18]; bool anti[1 << 18];

void find_pair(int NN, vector<int> UU, vector<int> VV, int A, int B) {
	// ----------------------------- Step 0: Input ---------------------------
	N = NN; M = UU.size();
	for (int i = 0; i < M; i++) { U[i] = UU[i]; V[i] = VV[i]; }

	// -------------------------- Step 1: Get All-A --------------------------
	vector<int> W(M, 0);
	long long BASE = ask(W), DIST = BASE / A;

	// ---------------------- Step 2: The Minimum Vertex ---------------------
	int c1 = 0;
	for (int i = 16; i >= 0; i--) {
		for (int j = 0; j < M; j++) {
			if (min(U[j], V[j]) >= c1 + (1 << i)) W[j] = 0;
			else W[j] = 1;
		}
		long long p1 = ask(W);
		if (p1 == BASE) { c1 += (1 << i); }
	}

	// -------------------------- Step 3: Make Tree --------------------------
	for (int i = 0; i < M; i++) {
		if (min(U[i], V[i]) < c1) continue;
		G[U[i]].push_back(make_pair(V[i], i));
		G[V[i]].push_back(make_pair(U[i], i));
	}

	for (int i = 0; i < N; i++) dist[i] = (1 << 30);

	queue<int> que; que.push(c1); dist[c1] = 0;
	while (!que.empty()) {
		int pos1 = que.front(); que.pop();

		for (int i = 0; i < G[pos1].size(); i++) {
			int to = G[pos1][i].first;
			if (dist[to] > dist[pos1] + 1) {
				dist[to] = dist[pos1] + 1;
				que.push(to);
			}
		}
	}

	for (int i = c1 + 1; i < N; i++) {
		for (int j = 0; j < G[i].size(); j++) {
			int to = G[i][j].first;
			if (dist[i] > dist[to]) { par[i] = to; paredge[i] = G[i][j].second; break; }
		}
	}

	// ---------------------------- 4. Find T --------------------------------
	vector<pair<int, int>> V;
	for (int i = c1 + 1; i < N; i++) {
		if (dist[i] == (1 << 30)) continue;
		V.push_back(make_pair(dist[i], i));
	}
	sort(V.begin(), V.end());

	//for (int i = 0; i < V.size(); i++) cout << "V[" << i << "] = " << V[i].second << endl;

	int c2 = 0;
	for (int i = 16; i >= 0; i--) {
		for (int j = 0; j < W.size(); j++) W[j] = 1;
		for (int j = 0; j < c2 + (1 << i); j++) {
			if (j >= V.size()) break;
			W[paredge[V[j].second]] = 0;
		}
		long long p2 = ask(W);
		if (p2 != BASE) c2 += (1 << i);
	}

	// --------------------- 5. Find the candidate of S ----------------------
	long long T = V[c2].second, cand_dst = DIST - dist[T];
	if (cand_dst == 0) {
		answer(T, c1);
		return;
	}

	int cx = T; anti[cx] = true;
	while (true) {
		cx = par[cx];
		anti[cx] = true;
		if (cx == c1) break;
	}

	vector<int> V2;
	for (int i = c1 + 1; i < N; i++) {
		if (dist[i] == cand_dst && anti[i] == false) V2.push_back(i);
	}

	// ----------------------------- 6. Find S --------------------------------
	int c3 = 0;
	for (int i = 16; i >= 0; i--) {
		for (int j = 0; j < W.size(); j++) W[j] = 1;
		for (int j = c1 + 1; j < N; j++) W[paredge[j]] = 0;

		for (int j = 0; j < c3 + (1 << i); j++) {
			if (j >= V2.size()) break;
			W[paredge[V2[j]]] = 1;
		}
		long long p3 = ask(W);
		if (p3 == BASE) c3 += (1 << i);
	}

	long long S = V2[c3];
	answer(S, T);
	return;
}

Compilation message

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:44:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < G[pos1].size(); i++) {
                   ~~^~~~~~~~~~~~~~~~
highway.cpp:54:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < G[i].size(); j++) {
                   ~~^~~~~~~~~~~~~
highway.cpp:72:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < W.size(); j++) W[j] = 1;
                   ~~^~~~~~~~~~
highway.cpp:74:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (j >= V.size()) break;
        ~~^~~~~~~~~~~
highway.cpp:103:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < W.size(); j++) W[j] = 1;
                   ~~^~~~~~~~~~
highway.cpp:107:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (j >= V2.size()) break;
        ~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 6500 KB Output is correct
2 Correct 7 ms 6392 KB Output is correct
3 Correct 8 ms 6580 KB Output is correct
4 Correct 8 ms 6584 KB Output is correct
5 Correct 8 ms 6392 KB Output is correct
6 Correct 8 ms 6392 KB Output is correct
7 Correct 8 ms 6392 KB Output is correct
8 Correct 8 ms 6444 KB Output is correct
9 Correct 8 ms 6392 KB Output is correct
10 Correct 7 ms 6500 KB Output is correct
11 Correct 8 ms 6500 KB Output is correct
12 Correct 8 ms 6500 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 6520 KB Output is correct
2 Correct 45 ms 7452 KB Output is correct
3 Correct 224 ms 14504 KB Output is correct
4 Correct 222 ms 14508 KB Output is correct
5 Correct 218 ms 14540 KB Output is correct
6 Correct 226 ms 14496 KB Output is correct
7 Correct 216 ms 14508 KB Output is correct
8 Correct 207 ms 14520 KB Output is correct
9 Correct 214 ms 14524 KB Output is correct
10 Correct 222 ms 14508 KB Output is correct
11 Correct 218 ms 14036 KB Output is correct
12 Correct 226 ms 13972 KB Output is correct
13 Correct 231 ms 13976 KB Output is correct
14 Correct 256 ms 13936 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 7336 KB Output is correct
2 Correct 45 ms 8056 KB Output is correct
3 Correct 48 ms 7688 KB Output is correct
4 Correct 175 ms 12092 KB Output is correct
5 Correct 167 ms 12160 KB Output is correct
6 Correct 177 ms 13324 KB Output is correct
7 Correct 143 ms 9648 KB Output is correct
8 Correct 162 ms 12460 KB Output is correct
9 Correct 149 ms 10628 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 6568 KB Output is correct
2 Correct 29 ms 7452 KB Output is correct
3 Correct 162 ms 12140 KB Output is correct
4 Correct 238 ms 12992 KB Output is correct
5 Correct 231 ms 13880 KB Output is correct
6 Correct 190 ms 12524 KB Output is correct
7 Correct 202 ms 13512 KB Output is correct
8 Correct 224 ms 13136 KB Output is correct
9 Correct 278 ms 14332 KB Output is correct
10 Correct 212 ms 14464 KB Output is correct
11 Correct 235 ms 13296 KB Output is correct
12 Correct 253 ms 13964 KB Output is correct
13 Correct 235 ms 13964 KB Output is correct
14 Correct 253 ms 13580 KB Output is correct
15 Correct 220 ms 13896 KB Output is correct
16 Correct 211 ms 12956 KB Output is correct
17 Correct 247 ms 13604 KB Output is correct
18 Correct 219 ms 13324 KB Output is correct
19 Correct 165 ms 12332 KB Output is correct
20 Correct 201 ms 13096 KB Output is correct
21 Correct 230 ms 13436 KB Output is correct
22 Correct 183 ms 12336 KB Output is correct
23 Correct 218 ms 15100 KB Output is correct
24 Correct 266 ms 15004 KB Output is correct
25 Correct 266 ms 14088 KB Output is correct

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 7528 KB Output is correct
2 Correct 29 ms 7576 KB Output is correct
3 Correct 231 ms 14752 KB Output is correct
4 Correct 240 ms 14652 KB Output is correct
5 Correct 324 ms 16040 KB Output is correct
6 Correct 288 ms 15564 KB Output is correct
7 Correct 332 ms 15948 KB Output is correct
8 Correct 289 ms 16200 KB Output is correct
9 Correct 202 ms 11404 KB Output is correct
10 Correct 195 ms 11376 KB Output is correct
11 Correct 229 ms 10804 KB Output is correct
12 Correct 296 ms 14556 KB Output is correct
13 Correct 307 ms 16208 KB Output is correct
14 Correct 323 ms 16036 KB Output is correct
15 Correct 328 ms 16032 KB Output is correct
16 Correct 293 ms 14876 KB Output is correct
17 Correct 220 ms 14860 KB Output is correct
18 Correct 225 ms 14400 KB Output is correct
19 Correct 235 ms 15012 KB Output is correct
20 Correct 216 ms 13888 KB Output is correct
21 Correct 319 ms 16636 KB Output is correct

Subtask #6
21.0 / 31.0

# Verdict Execution time Memory Grader output
1 Partially correct 32 ms 7436 KB Output is partially correct
2 Partially correct 30 ms 7516 KB Output is partially correct
3 Partially correct 250 ms 14364 KB Output is partially correct
4 Partially correct 253 ms 14788 KB Output is partially correct
5 Partially correct 263 ms 14484 KB Output is partially correct
6 Partially correct 327 ms 16336 KB Output is partially correct
7 Partially correct 244 ms 14544 KB Output is partially correct
8 Correct 228 ms 15152 KB Output is correct
9 Correct 238 ms 15512 KB Output is correct
10 Partially correct 337 ms 16576 KB Output is partially correct
11 Partially correct 288 ms 15796 KB Output is partially correct
12 Partially correct 336 ms 16656 KB Output is partially correct
13 Correct 225 ms 11392 KB Output is correct
14 Correct 270 ms 14264 KB Output is correct
15 Correct 259 ms 12908 KB Output is correct
16 Correct 241 ms 12444 KB Output is correct
17 Correct 208 ms 10652 KB Output is correct
18 Correct 247 ms 12964 KB Output is correct
19 Partially correct 305 ms 15136 KB Output is partially correct
20 Partially correct 308 ms 15788 KB Output is partially correct
21 Partially correct 285 ms 15540 KB Output is partially correct
22 Partially correct 304 ms 15344 KB Output is partially correct
23 Partially correct 330 ms 16412 KB Output is partially correct
24 Partially correct 305 ms 16124 KB Output is partially correct
25 Partially correct 277 ms 13632 KB Output is partially correct
26 Partially correct 324 ms 16592 KB Output is partially correct
27 Partially correct 207 ms 13772 KB Output is partially correct
28 Correct 184 ms 13792 KB Output is correct
29 Partially correct 243 ms 13584 KB Output is partially correct
30 Partially correct 207 ms 12712 KB Output is partially correct
31 Partially correct 215 ms 14380 KB Output is partially correct
32 Partially correct 225 ms 13348 KB Output is partially correct
33 Partially correct 206 ms 14344 KB Output is partially correct
34 Correct 246 ms 14912 KB Output is correct
35 Partially correct 213 ms 15012 KB Output is partially correct
36 Partially correct 274 ms 13716 KB Output is partially correct
37 Partially correct 230 ms 13964 KB Output is partially correct
38 Partially correct 223 ms 13000 KB Output is partially correct
39 Partially correct 335 ms 16708 KB Output is partially correct
40 Partially correct 333 ms 16644 KB Output is partially correct
41 Partially correct 352 ms 16584 KB Output is partially correct
42 Partially correct 302 ms 16608 KB Output is partially correct