Submission #433222

#	Time	Username	Problem	Language	Result	Execution time	Memory
433222		hhhhaura	Easter Eggs (info1cup17_eastereggs)	C++14	100 / 100	21 ms	356 KiB

eastereggs

#include "grader.h"
#define wiwihorz
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma loop-opt(on)

#define rep(i, a, b) for(int i = a; i <= b; i ++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define all(x) x.begin(), x.end()
#define ceil(a, b) ((a + b - 1) / (b))

#define INF 1000000000000000000
#define MOD 1000000007
#define eps (1e-9)

using namespace std;

#define lld long double
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())

#ifdef wiwihorz
#define print(a...) kout("[" + string(#a) + "] = ", a) 
void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
void kout() { cerr << endl; }
template<class T1, class ... T2> void kout(T1 a, T2 ... e) { cerr << a << " ", kout(e...); }
#else
#define print(...) 0
#define vprint(...) 0
#endif
int n, timestamp = 0;
vector<vector<int>> mp;
vector<int> qq, pre;
void dfs(int x, int par) {
	pre[++timestamp] = x;
	for(auto i : mp[x]) if(i != par) {
		dfs(i, x);
	}
}
int findEgg (int N, vector<pii> bridges) {
	n = N, timestamp = 0;
	mp.assign(n + 1, vector<int>());
	qq.clear(), pre.assign(n + 1, 0);
	for(auto i : bridges) {
		mp[i.first].push_back(i.second);
		mp[i.second].push_back(i.first);
	}
	dfs(1, 1);
	int l = 0, r = timestamp;
	while(r - l > 1) {
		int mid = (l + r) / 2;
		qq.clear();
		rep(i, 1, mid) qq.push_back(pre[i]);
		if(query(qq)) r = mid;
		else l = mid;
	}
	return pre[r];
}

Compilation message (stderr)

eastereggs.cpp:5: warning: ignoring '#pragma loop ' [-Wunknown-pragmas]
    5 | #pragma loop-opt(on)
      | 
eastereggs.cpp:24:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   24 | void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
      |             ^~~~
eastereggs.cpp:24:21: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   24 | void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
      |                     ^~~~

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