Submission #534634

#	Time	Username	Problem	Language	Result	Execution time	Memory
534634		shrimb	Carnival (CEOI14_carnival)	C++17	0 / 100	34 ms	464 KiB

carnival

#include"bits/stdc++.h"
#define int long long
// #define endl '\n'
using namespace std;

int dsu[20001];
int ans[20001];

int Find (int x) {
	return dsu[x] == x ? x : dsu[x] = Find(dsu[x]);
}

void Union (int a, int b) {
	dsu[Find(a)] = Find(b);
}

int asked[151][151];
bool Query (int a, int b) {
	if (asked[a][b] != -1) return asked[a][b];
	cout << "2 " << a << " " << b << endl;
	int x;
	cin >> x;
	return asked[a][b] = asked[b][a] = x == 1;
}
bitset<151> vis;


signed main () {
	srand(time(0));
	memset(asked, -1, sizeof asked);
	int n;
	cin >> n;
	for (int i = 1 ; i <= n ; i++) dsu[i] = i;
	for (int i = 1 ; i <= n ; i++) {
		vis = 0;
		vis[i] = 1;
		for (int j = 0 ; j < 23 ; j++) {
			int x = rand() % n + 1;
			if (vis[x]) {j-=(vis.count() < n); continue;}
			else {
				vis[x] = 1;
				if (Query(i, x)) Union(i, x);
			}
		}
	}

	int c = 1;
	for (int i = 1 ; i <= n ; i++) if (dsu[i] == i) ans[i] = c++;
	cout << 0 << " ";
	for (int i = 1 ; i <= n ; i++) cout << ans[Find(i)] << " ";
	cout << endl;
}

Compilation message (stderr)

carnival.cpp: In function 'bool Query(long long int, long long int)':
carnival.cpp:23:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   23 |  return asked[a][b] = asked[b][a] = x == 1;
      |         ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
carnival.cpp: In function 'int main()':
carnival.cpp:39:33: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   39 |    if (vis[x]) {j-=(vis.count() < n); continue;}
      |                     ~~~~~~~~~~~~^~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20