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Submission #319077

# Submission time Handle Problem Language Result Execution time Memory
319077 2020-11-03T20:57:01 Z NachoLibre Easter Eggs (info1cup17_eastereggs) C++14
100 / 100
 22 ms 448 KB 
#include <bits/stdc++.h>
using namespace std;

int query(vector<int> islads);

vector<int> v[513], ve;
int bo[513], c, a;

void sgd(int dg, int op) {
	ve.push_back(dg);
	if(bo[dg]) ++a;
	if(a == c / 2) return;
	for(int i = 0; i < v[dg].size(); ++i) {
		if(v[dg][i] != op) {
			sgd(v[dg][i], dg);
			if(a == c / 2) return;
		}
	}
}

int findEgg(int n, vector<pair<int, int> > brd) {
	for(int i = 1; i <= n; ++i) {
		v[i].clear();
		bo[i] = 1;
	}
	for(int i = 0; i < n - 1; ++i) {
		v[brd[i].first].push_back(brd[i].second);
		v[brd[i].second].push_back(brd[i].first);
	}
	c = n;
	while(c > 1) {
		ve.clear(); a = 0;
		sgd(1, 0);
		if(query(ve)) {
			for(int i = 0; i < ve.size(); ++i) {
				if(bo[ve[i]]) bo[ve[i]] = 2;
			}
			for(int i = 1; i <= n; ++i) {
				if(bo[i] == 1) bo[i] = 0, --c;
			}
			for(int i = 1; i <= n; ++i) {
				if(bo[i] == 2) bo[i] = 1;
			}
		} else {
			for(int i = 0; i < ve.size(); ++i) {
				if(bo[ve[i]]) bo[ve[i]] = 0, --c;
			}
		}
	}
	for(int i = 1; i <= n; ++i) {
		if(bo[i]) return i;
	}
}
/*
int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	return 0;
}
*/

Compilation message

eastereggs.cpp: In function 'void sgd(int, int)':
eastereggs.cpp:13:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for(int i = 0; i < v[dg].size(); ++i) {
      |                 ~~^~~~~~~~~~~~~~
eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:35:21: 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 < ve.size(); ++i) {
      |                   ~~^~~~~~~~~~~
eastereggs.cpp:45:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |    for(int i = 0; i < ve.size(); ++i) {
      |                   ~~^~~~~~~~~~~
eastereggs.cpp:53:1: warning: control reaches end of non-void function [-Wreturn-type]
   53 | }
      | ^

Subtask #1
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Number of queries: 4
2 Correct 1 ms 364 KB Number of queries: 4
3 Correct 1 ms 364 KB Number of queries: 4
4 Correct 1 ms 364 KB Number of queries: 4

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 364 KB Number of queries: 8
2 Correct 14 ms 448 KB Number of queries: 9
3 Correct 22 ms 432 KB Number of queries: 9
4 Correct 20 ms 364 KB Number of queries: 9

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 364 KB Number of queries: 9
2 Correct 19 ms 364 KB Number of queries: 9
3 Correct 21 ms 384 KB Number of queries: 9
4 Correct 19 ms 432 KB Number of queries: 9