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Submission #285087

# Submission time Handle Problem Language Result Execution time Memory
285087 2020-08-28T10:03:12 Z Berted Unscrambling a Messy Bug (IOI16_messy) C++14
100 / 100
 3 ms 512 KB 
#include <vector>
#include <iostream>
#include <assert.h>

#include "messy.h"

using namespace std;

string start;
vector<int> ans, ans2;

void flip(string& s, int i) {s[i] = ((s[i] - '0') ^ 1) + '0';}

void ask(int L, int R, string s)
{
	if (L < R)
	{
		int M = L + R >> 1;
		for (int i = M + 1; i <= R; i++)
		{
			flip(s, i);
			add_element(s);
			flip(s, i);
		}
		for (int i = M + 1; i <= R; i++) {flip(s, i);}
		ask(L, M, s); 
		for (int i = L; i <= R; i++) {flip(s, i);}
		ask(M + 1, R, s);
	}
}

void solve(int L, int R, string s)
{
	if (L < R)
	{
		int M = L + R >> 1, idx = L;
		for (int i = L; i <= R; i++)
		{
			flip(s, ans[i]);
			if (!check_element(s)) {flip(s, ans[i]); swap(ans[i], ans[idx++]);}
			else {flip(s, ans[i]);}
		}
		assert(idx == M + 1);
		for (int i = M + 1; i <= R; i++) {flip(s, ans[i]);}
		solve(L, M, s); 
		for (int i = L; i <= R; i++) {flip(s, ans[i]);}
		solve(M + 1, R, s);
	}
}

vector<int> restore_permutation(int n, int w, int r) 
{
    for (int i = 0; i < n; i++) {start.push_back('0'); ans.push_back(i); ans2.push_back(0);}
    ask(0, n - 1, start);
	compile_set();
	solve(0, n - 1, start);
	for (int i = 0; i < ans.size(); i++) {ans2[ans[i]] = i;}
	return ans2;
}

Compilation message

messy.cpp: In function 'void ask(int, int, std::string)':
messy.cpp:18:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   18 |   int M = L + R >> 1;
      |           ~~^~~
messy.cpp: In function 'void solve(int, int, std::string)':
messy.cpp:36:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   36 |   int M = L + R >> 1, idx = L;
      |           ~~^~~
messy.cpp: In function 'std::vector<int> restore_permutation(int, int, int)':
messy.cpp:57:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |  for (int i = 0; i < ans.size(); i++) {ans2[ans[i]] = i;}
      |                  ~~^~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB n = 8
2 Correct 0 ms 256 KB n = 8
3 Correct 1 ms 384 KB n = 8
4 Correct 1 ms 256 KB n = 8
5 Correct 0 ms 256 KB n = 8
6 Correct 1 ms 256 KB n = 8
7 Correct 0 ms 256 KB n = 8
8 Correct 0 ms 256 KB n = 8
9 Correct 0 ms 256 KB n = 8
10 Correct 0 ms 256 KB n = 8
11 Correct 0 ms 256 KB n = 8
12 Correct 1 ms 256 KB n = 8
13 Correct 0 ms 256 KB n = 8
14 Correct 0 ms 256 KB n = 8
15 Correct 0 ms 256 KB n = 8

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB n = 32
2 Correct 1 ms 384 KB n = 32
3 Correct 1 ms 384 KB n = 32
4 Correct 1 ms 384 KB n = 32
5 Correct 1 ms 384 KB n = 32
6 Correct 1 ms 384 KB n = 32
7 Correct 1 ms 384 KB n = 32
8 Correct 1 ms 384 KB n = 32
9 Correct 1 ms 384 KB n = 32
10 Correct 1 ms 512 KB n = 32
11 Correct 1 ms 384 KB n = 32
12 Correct 1 ms 384 KB n = 32
13 Correct 1 ms 384 KB n = 32
14 Correct 1 ms 384 KB n = 32
15 Correct 1 ms 384 KB n = 32

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB n = 32
2 Correct 1 ms 384 KB n = 32
3 Correct 1 ms 384 KB n = 32
4 Correct 1 ms 384 KB n = 32
5 Correct 1 ms 384 KB n = 32
6 Correct 1 ms 384 KB n = 32
7 Correct 1 ms 384 KB n = 32
8 Correct 1 ms 384 KB n = 32
9 Correct 1 ms 384 KB n = 32
10 Correct 1 ms 384 KB n = 32
11 Correct 1 ms 384 KB n = 32
12 Correct 1 ms 384 KB n = 32
13 Correct 1 ms 384 KB n = 32
14 Correct 1 ms 384 KB n = 32
15 Correct 1 ms 384 KB n = 32

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 512 KB n = 128
2 Correct 2 ms 512 KB n = 128
3 Correct 2 ms 512 KB n = 128
4 Correct 2 ms 512 KB n = 128
5 Correct 2 ms 512 KB n = 128
6 Correct 2 ms 512 KB n = 128
7 Correct 2 ms 512 KB n = 128
8 Correct 2 ms 512 KB n = 128
9 Correct 2 ms 512 KB n = 128
10 Correct 2 ms 512 KB n = 128
11 Correct 2 ms 512 KB n = 128
12 Correct 3 ms 512 KB n = 128
13 Correct 2 ms 512 KB n = 128
14 Correct 2 ms 512 KB n = 128
15 Correct 2 ms 512 KB n = 128

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 512 KB n = 128
2 Correct 2 ms 512 KB n = 128
3 Correct 3 ms 512 KB n = 128
4 Correct 3 ms 512 KB n = 128
5 Correct 2 ms 512 KB n = 128
6 Correct 2 ms 512 KB n = 128
7 Correct 2 ms 512 KB n = 128
8 Correct 2 ms 512 KB n = 128
9 Correct 2 ms 512 KB n = 128
10 Correct 3 ms 512 KB n = 128
11 Correct 2 ms 512 KB n = 128
12 Correct 2 ms 512 KB n = 128
13 Correct 2 ms 512 KB n = 128
14 Correct 3 ms 512 KB n = 128
15 Correct 2 ms 512 KB n = 128