oj.uz

Submission #702133

# Submission time Handle Problem Language Result Execution time Memory
702133 2023-02-23T04:47:31 Z Etherite Speedrun (RMI21_speedrun) C++17
100 / 100
 208 ms 932 KB 
#include <bits/stdc++.h>
#include "speedrun.h"

using namespace std;

void dfsHint(int curr, int par, vector<vector<int>> &adjHint, vector<int> &path)
{
	path.push_back(curr);
	for(int i = 0; i < 10; i++) // set in big-endian
	{
		if(par & (1 << i)) setHint(curr, i + 1, 1);
		else setHint(curr, i + 1, 0);
	}
	for(int next : adjHint[curr])
	{
		if(next == par) continue;
		dfsHint(next, curr, adjHint, path);
	}
}

void assignHints(int subtask, int N, int A[], int B[]) 
{
	setHintLen(20);
	vector<vector<int>> adjHint(N + 1);
	for(int i = 1; i < N; i++)
	{
		adjHint[A[i]].push_back(B[i]);
		adjHint[B[i]].push_back(A[i]);
	}
	for(int i = 1; i <= N; i++) sort(adjHint[i].begin(), adjHint[i].end());
	vector<int> path;
	dfsHint(1, 0, adjHint, path);
	// for(auto i : path) cout << i << " ";
	// cout << "\n";
	for(int i = 0; i < path.size() - 1; i++)
	{
		int child = path[i + 1];
		for(int j = 10; j < 20; j++) // set in big-endian
		{
			if(child & (1 << (j - 10))) setHint(path[i], j + 1, 1);
			else setHint(path[i], j + 1, 0);
		}
	}
}

int dfs(int curr, int toTry) // returns next value to try
{
	int par = 0, child = 0;
	for(int i = 0; i < 10; i++) par += getHint(i + 1) * (1 << i);
	for(int i = 10; i < 20; i++) child += getHint(i + 1) * (1 << (i - 10));

	if(toTry == 0) toTry = child;
	if(toTry == 0) return 0;
	
	while(toTry != 0 && goTo(toTry)) 
	{
		toTry = dfs(toTry, 0);
	}
	if(par == 0) return 0;
	goTo(par);
	return toTry;
}

void speedrun(int subtask, int N, int start) 
{
	if(N == 1) return;
	int l = getLength();
	while(start != 1)
	{
		int par = 0;
		for(int i = 0; i < 10; i++) par += getHint(i + 1) * (1 << i);
		goTo(par);
		start = par;
	}
	dfs(start, 0);
}

Compilation message

speedrun.cpp: In function 'void assignHints(int, int, int*, int*)':
speedrun.cpp:35:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |  for(int i = 0; i < path.size() - 1; i++)
      |                 ~~^~~~~~~~~~~~~~~~~
speedrun.cpp: In function 'void speedrun(int, int, int)':
speedrun.cpp:67:6: warning: unused variable 'l' [-Wunused-variable]
   67 |  int l = getLength();
      |      ^

Subtask #1
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 792 KB Output is correct
2 Correct 170 ms 756 KB Output is correct
3 Correct 114 ms 736 KB Output is correct
4 Correct 191 ms 904 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 133 ms 848 KB Output is correct
2 Correct 148 ms 676 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 868 KB Output is correct
2 Correct 191 ms 740 KB Output is correct
3 Correct 165 ms 740 KB Output is correct

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 189 ms 756 KB Output is correct
2 Correct 141 ms 724 KB Output is correct
3 Correct 173 ms 692 KB Output is correct
4 Correct 183 ms 740 KB Output is correct
5 Correct 166 ms 724 KB Output is correct
6 Correct 201 ms 748 KB Output is correct

Subtask #5
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 138 ms 856 KB Output is correct
2 Correct 201 ms 812 KB Output is correct
3 Correct 191 ms 804 KB Output is correct
4 Correct 180 ms 932 KB Output is correct
5 Correct 139 ms 732 KB Output is correct
6 Correct 208 ms 672 KB Output is correct
7 Correct 183 ms 688 KB Output is correct