oj.uz

Submission #393649

# Submission time Handle Problem Language Result Execution time Memory
393649 2021-04-24T07:46:44 Z JimmyZJX Ancient Books (IOI17_books) C++14
22 / 100
 2000 ms 981628 KB 
#include <iostream>
#include <fstream>
#include <algorithm>
#include <cstring>
#include <climits>
#include <cassert>
#include <tuple>
#include <queue>
#include <stack>
#include <vector>
#include <map>
#include <set>
#include <string>
#include <unordered_set>
#include <unordered_map>
#include <numeric>

using namespace std;

typedef long long LL;
typedef vector<int> Vi;
typedef vector<LL> VL;
typedef vector<bool> Vb;
typedef vector<vector<int>> Vii;
typedef vector<vector<vector<int>>> Viii;
typedef vector<vector<pair<int, int>>> Vip;

#define forR(i, n) for (int i = 0; i < (n); i++)

const int INF = 1 << 25;

int dist(int x1, int x2, int y1, int y2) {
	int d1 = x1 - y2, d2 = x2 - y1;
	if (d1 > 0 == d2 > 0)
		return min(abs(d1), abs(d2));
	return 0;
}

LL minimum_walk(Vi p, int s) {

	int n = p.size();

	LL ans = 0;
	Vi g(n);
	Vii gps(1); // dummy
	int gn = 0; // [1, gn]
	Vi gpMin(1, s), gpMax(1, s);

	forR(i, n) {
		if (p[i] == i) continue;

		gn++;
		Vi gp;
		int mi = INF, ma = -1;

		int h = p[i];
		int pos = i;
		g[i] = gn; gp.push_back(i); mi = min(mi, i); ma = max(ma, i);
		while (h != i) {
			ans += abs(h - pos);
			pos = h;
			g[h] = gn; gp.push_back(h); mi = min(mi, h); ma = max(ma, h);
			swap(h, p[h]);
		}
		ans += abs(pos - i);
		p[i] = i;
		gps.push_back(gp);
		gpMin.push_back(mi); gpMax.push_back(ma);
	}


	Vii nbs(gn + 1);
	Vii nbDs(gn + 1);

	for (int j = 1; j <= gn; j++) {
		int d = INF;
		for (int k : gps[j]) {
			d = min(d, abs(k - s));
		}
		nbs[0].push_back(j);
		nbDs[0].push_back(d);
	}

	for (int i = 1; i <= gn; i++) {
		for (int j = 1; j <= gn; j++) {
			if (i == j) continue;
			nbs[i].push_back(j);
			nbDs[i].push_back(dist(gpMin[i], gpMax[i], gpMin[j], gpMax[j]));
		}
	}

	//for (int i = 1; i <= gn; i++) {
	//	auto& gp = gps[i];
	//	map<int, int> distToGp;
	//	distToGp[0] = INF;
	//	for (int j : gp) {
	//		distToGp[0] = min(distToGp[0], abs(j - s));
	//		// left
	//		for (int k = j - 1; k >= 0; k--) {
	//			if (g[k] > 0) {
	//				if (g[k] != g[i]) {
	//					// other group
	//					int d = abs(j - k);
	//					if (distToGp.count(g[k]) > 0) {
	//						distToGp[g[k]] = min(distToGp[g[k]], d);
	//					} else {
	//						distToGp[g[k]] = d;
	//					}
	//				}
	//				break;
	//			}
	//		}
	//		// right
	//		for (int k = j + 1; k < n; k++) {
	//			if (g[k] > 0) {
	//				if (g[k] != g[i]) {
	//					// other group
	//					int d = abs(j - k);
	//					if (distToGp.count(g[k]) > 0) {
	//						distToGp[g[k]] = min(distToGp[g[k]], d);
	//					} else {
	//						distToGp[g[k]] = d;
	//					}
	//				}
	//				break;
	//			}
	//		}
	//	}

	//	for (auto p : distToGp) {
	//		nbs[i].push_back(p.first);
	//		nbDs[i].push_back(p.second);
	//	}
	//	nbs[0].push_back(i);
	//	nbDs[0].push_back(distToGp[0]);
	//}

	// MST
	LL mst = 0;
	Vb vis(gn + 1);
	set<pair<int, int>> minQ; // {dist, gp}
	minQ.insert({ 0, 0 });
	while (!minQ.empty()) {
		auto t = *minQ.begin(); minQ.erase(t);
		int gp = t.second;
		if (vis[gp]) continue;
		mst += t.first;
		vis[gp] = true;
		forR(i, nbs[gp].size()) {
			minQ.insert({ nbDs[gp][i], nbs[gp][i] });
		}
	}

	return ans + mst * 2;

}

#ifdef TEST_LOCAL

int main() {
	auto r = minimum_walk(Vi{ 3, 2, 1, 0 }, 0);

	return 0;
}
#endif

Compilation message

books.cpp: In function 'int dist(int, int, int, int)':
books.cpp:34:9: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses]
   34 |  if (d1 > 0 == d2 > 0)
      |      ~~~^~~
books.cpp: In function 'LL minimum_walk(Vi, int)':
books.cpp:28:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 | #define forR(i, n) for (int i = 0; i < (n); i++)
      |                                      ^
books.cpp:149:3: note: in expansion of macro 'forR'
  149 |   forR(i, nbs[gp].size()) {
      |   ^~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 288 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 288 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 292 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 13 ms 2280 KB Output is correct
23 Correct 15 ms 2424 KB Output is correct
24 Correct 15 ms 2456 KB Output is correct
25 Correct 17 ms 2652 KB Output is correct
26 Correct 5 ms 972 KB Output is correct
27 Correct 2 ms 588 KB Output is correct
28 Correct 2 ms 424 KB Output is correct
29 Correct 16 ms 2612 KB Output is correct

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 288 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 292 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 13 ms 2280 KB Output is correct
23 Correct 15 ms 2424 KB Output is correct
24 Correct 15 ms 2456 KB Output is correct
25 Correct 17 ms 2652 KB Output is correct
26 Correct 5 ms 972 KB Output is correct
27 Correct 2 ms 588 KB Output is correct
28 Correct 2 ms 424 KB Output is correct
29 Correct 16 ms 2612 KB Output is correct
30 Correct 216 ms 20032 KB Output is correct
31 Correct 220 ms 18556 KB Output is correct
32 Correct 134 ms 13784 KB Output is correct
33 Execution timed out 2133 ms 981628 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 2124 KB 3rd lines differ - on the 1st token, expected: '3304', found: '2744'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 288 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 292 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 13 ms 2280 KB Output is correct
23 Correct 15 ms 2424 KB Output is correct
24 Correct 15 ms 2456 KB Output is correct
25 Correct 17 ms 2652 KB Output is correct
26 Correct 5 ms 972 KB Output is correct
27 Correct 2 ms 588 KB Output is correct
28 Correct 2 ms 424 KB Output is correct
29 Correct 16 ms 2612 KB Output is correct
30 Correct 216 ms 20032 KB Output is correct
31 Correct 220 ms 18556 KB Output is correct
32 Correct 134 ms 13784 KB Output is correct
33 Execution timed out 2133 ms 981628 KB Time limit exceeded
34 Halted 0 ms 0 KB -