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Submission #674099

# Submission time Handle Problem Language Result Execution time Memory
674099 2022-12-23T05:08:47 Z QwertyPi Easter Eggs (info1cup17_eastereggs) C++14
0 / 100
 5 ms 592 KB 
#include <bits/stdc++.h>

using namespace std;

int query(vector<int> islands);

vector<int> G[513];

int c = 0, tot = 512;
int u[513], elim[513];
void dfs(int t, int v, int par = -1){
	if(c == tot) return;
	if(u[v] == 0) c++, u[v] = t;
	for(auto i : G[v]){
		if(i == par || elim[i])
			continue;
		dfs(t, i, v);
	}
}

int findEgg(int N, vector<pair<int, int>> bridges){
	for(int i = 1; i <= N; i++){
		G[i].clear();
	}
	for(int i = 0; i < N - 1; i++){
		G[bridges[i].first].push_back(bridges[i].second);
		G[bridges[i].second].push_back(bridges[i].first);
	}
	for(int i = N / 2, t = 1; i != 1; i /= 2, t++){
		tot = i; dfs(t, 1);
		vector<int> islands;
		for(int j = 1; j <= N; j++){
			if(u[j]) islands.push_back(j);
		}
		int r = query(islands);
		if(i == 1){
			if(!r){
				for(int i = 1; i <= N; i++){
					if(u[i] == t) return i;
				}
			}else{
				for(int i = 1; i <= N; i++){
					if(u[i] == 0) return i;
				} 
			}
		}
		if(!r){
			continue;
		}else{
			for(int i = 1; i <= N; i++){
				if(u[i] == 0) elim[i] = true;
				if(u[i] == t) u[i] = 0;
			}
		}
	}
}

Compilation message

eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:56:1: warning: control reaches end of non-void function [-Wreturn-type]
   56 | }
      | ^

Subtask #1
0 / 40.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 464 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 456 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 5 ms 592 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -