oj.uz

Submission #230629

# Submission time Handle Problem Language Result Execution time Memory
230629 2020-05-10T16:21:34 Z wilwxk Chameleon's Love (JOI20_chameleon) C++14
64 / 100
 72 ms 512 KB 
#include <bits/stdc++.h>
#include "chameleon.h"
using namespace std;

const int MAXN = 1005;
const int LOGN = 9;
int color[MAXN];
vector<int> bad[MAXN], ans[MAXN];
vector<int> comp[2];
int n;

void dfs(int u) {
	for(auto v : ans[u]) {
		if(color[v] != -1) continue;
		color[v] = color[u]^1;
		dfs(v);
	}
}

void separate(int k) {
	for(int i = 1; i <= k; i++) color[i] = -1;
	for(int i = 1; i <= k; i++) {
		if(color[i] != -1) continue;
		color[i] = 0;
		dfs(i);
	}

	comp[0].clear();
	comp[1].clear();
	for(int i = 1; i <= k; i++) comp[color[i]].push_back(i);
}

int bsearch(int u, int k, int l, int r) {
	if(l >= r) return l;
	int x = l;
	vector<int> qv;
	for(int j = LOGN; j >= 0; j--) {
		int ind = x + (1<<j);
		if(ind > r) continue;
		qv.clear();
		for(int i = l+1; i <= ind; i++) qv.push_back(comp[k][i]);
		qv.push_back(u);
		// for(auto a : qv) printf("%d ", a); cout << endl;
		// printf("q %d / %d %d %d %d\n", ind, u, k, l, r);
		if(Query(qv) == qv.size()) x = ind;
	}
	return x;
}

void Solve(int N) {
	n = 2*N;

	comp[0].push_back(1);

	for(int u = 2; u <= n; u++) {

		separate(u-1);

		int cnt = 0;
		for(int k = 0; k < 2; k++) {

			int l = -1; int r = comp[k].size()-1;

			for(int kk = 0; kk < 3; kk++) {
				if(cnt == 3) break;
				int ind = bsearch(u, k, l, r);
				if(ind == r) break;

				ans[u].push_back(comp[k][ind+1]);
				ans[comp[k][ind+1]].push_back(u);
				// printf("connect %d %d\n", u, comp[k][ind+1]);

				cnt++;
				l = ind+1;
			}
			
		}
	}


	for(int u = 1; u <= n; u++) {
		if(ans[u].size() == 1) continue;
		else {
			if(Query({u, ans[u][0], ans[u][1]}) == 1) {
				bad[ans[u][2]].push_back(u);
				bad[u].push_back(ans[u][2]);
			}
			else if(Query({u, ans[u][1], ans[u][2]}) == 1) {
				bad[ans[u][0]].push_back(u);
				bad[u].push_back(ans[u][0]);
			}
			else {
				bad[ans[u][1]].push_back(u);
				bad[u].push_back(ans[u][1]);
			}
		}
	}

	for(int u = 1; u <= n; u++) {
		if(color[u] == 2) continue;

		int x;
		if(ans[u].size() == 1) {
			x = ans[u][0];
		}
		else {
			for(int k = 0; k < 3; k++) {
				if(ans[u][k] != bad[u][0] && ans[u][k] != bad[u][1]) {
					x = ans[u][k];
				}
			}
		}
		
		Answer(u, x);
		color[u] = color[x] = 2;
	}
}

Compilation message

chameleon.cpp: In function 'int bsearch(int, int, int, int)':
chameleon.cpp:45:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(Query(qv) == qv.size()) x = ind;
      ~~~~~~~~~~^~~~~~~~~~~~
chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:115:23: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   color[u] = color[x] = 2;
              ~~~~~~~~~^~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 56 ms 504 KB Output is correct
4 Correct 55 ms 384 KB Output is correct
5 Correct 56 ms 384 KB Output is correct
6 Correct 57 ms 384 KB Output is correct
7 Correct 56 ms 504 KB Output is correct
8 Correct 57 ms 512 KB Output is correct
9 Correct 56 ms 384 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 6 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 59 ms 504 KB Output is correct
4 Correct 57 ms 504 KB Output is correct
5 Correct 58 ms 504 KB Output is correct
6 Correct 59 ms 504 KB Output is correct
7 Correct 58 ms 504 KB Output is correct
8 Correct 58 ms 504 KB Output is correct
9 Correct 58 ms 504 KB Output is correct

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 56 ms 504 KB Output is correct
4 Correct 55 ms 384 KB Output is correct
5 Correct 56 ms 384 KB Output is correct
6 Correct 57 ms 384 KB Output is correct
7 Correct 56 ms 504 KB Output is correct
8 Correct 57 ms 512 KB Output is correct
9 Correct 56 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 4 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 4 ms 384 KB Output is correct
16 Correct 4 ms 384 KB Output is correct
17 Correct 4 ms 384 KB Output is correct
18 Correct 4 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 6 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 4 ms 384 KB Output is correct
29 Correct 4 ms 384 KB Output is correct
30 Correct 59 ms 504 KB Output is correct
31 Correct 57 ms 504 KB Output is correct
32 Correct 58 ms 504 KB Output is correct
33 Correct 59 ms 504 KB Output is correct
34 Correct 58 ms 504 KB Output is correct
35 Correct 58 ms 504 KB Output is correct
36 Correct 58 ms 504 KB Output is correct
37 Incorrect 72 ms 452 KB Wrong Answer [3]
38 Halted 0 ms 0 KB -