oj.uz

Submission #230630

# Submission time Handle Problem Language Result Execution time Memory
230630 2020-05-10T16:28:18 Z wilwxk Chameleon's Love (JOI20_chameleon) C++14
44 / 100
 77 ms 536 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] = rand()%2;
		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 4 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 76 ms 384 KB Output is correct
4 Correct 77 ms 384 KB Output is correct
5 Correct 77 ms 384 KB Output is correct
6 Correct 76 ms 384 KB Output is correct
7 Correct 75 ms 384 KB Output is correct
8 Correct 76 ms 384 KB Output is correct
9 Correct 74 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 4 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 4 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 5 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
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 72 ms 504 KB Output is correct
4 Correct 71 ms 536 KB Output is correct
5 Correct 71 ms 504 KB Output is correct
6 Incorrect 70 ms 504 KB Wrong Answer [3]
7 Halted 0 ms 0 KB -

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 76 ms 384 KB Output is correct
4 Correct 77 ms 384 KB Output is correct
5 Correct 77 ms 384 KB Output is correct
6 Correct 76 ms 384 KB Output is correct
7 Correct 75 ms 384 KB Output is correct
8 Correct 76 ms 384 KB Output is correct
9 Correct 74 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 4 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 5 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 5 ms 384 KB Output is correct
30 Correct 72 ms 504 KB Output is correct
31 Correct 71 ms 536 KB Output is correct
32 Correct 71 ms 504 KB Output is correct
33 Incorrect 70 ms 504 KB Wrong Answer [3]
34 Halted 0 ms 0 KB -