Submission #892747

#	Time	Username	Problem	Language	Result	Execution time	Memory
892747		Isam	Easter Eggs (info1cup17_eastereggs)	C++17	0 / 100	6 ms	1996 KiB

eastereggs

#include<bits/stdc++.h>

#include "grader.h"

#ifdef DEBUG
  #include "debug.h"
#else
  #define debug(...) void(37)
#endif

using namespace std;

constexpr int sz = 2e5 + 5;

#define pii pair<int, int>
#define F first
#define S second

int timel;
int tin[sz];

vector<vector<int>> g;

inline void Dfs(int node, int fa = 1){
	tin[++timel] = node;
	for(auto &to : g[node]){
		if(to == fa) continue;
		Dfs(to, node);
	}
	return;
}

bool Query(int r){
	vector<int> v;
	for(register int i(1); i <= r; ++i) v.emplace_back(tin[i]);
	return query(v);
}

int findEgg(int N, vector < pair < int, int > > bridges){
	g.resize(N+1);
	for(register int i(0), a, b; i < N; ++i){
		a = bridges[i].F, b = bridges[i].S;
		g[a].emplace_back(b), g[b].emplace_back(a);
	}
	Dfs(1);
	int l = 1, r = N, mid, best(0);
	while(l <= r){
		mid = l + ((r - l) >> 1);
		if(Query(mid)){
			best = mid;
			r = mid - 1;
		}else{
			l = mid + 1;
		}
	}
	return tin[best];
}

Compilation message (stderr)

eastereggs.cpp: In function 'bool Query(int)':
eastereggs.cpp:35:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   35 |  for(register int i(1); i <= r; ++i) v.emplace_back(tin[i]);
      |                   ^
eastereggs.cpp: In function 'int findEgg(int, std::vector<std::pair<int, int> >)':
eastereggs.cpp:41:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   41 |  for(register int i(0), a, b; i < N; ++i){
      |                   ^
eastereggs.cpp:41:25: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   41 |  for(register int i(0), a, b; i < N; ++i){
      |                         ^
eastereggs.cpp:41:28: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   41 |  for(register int i(0), a, b; i < N; ++i){
      |                            ^

• Subtask 1: 0 / 40
• Subtask 2: 0 / 40
• Subtask 3: 0 / 20