Submission #272915

#	Time	Username	Problem	Language	Result	Execution time	Memory
272915		cheissmart	Gap (APIO16_gap)	C++14	38.45 / 100	128 ms	2420 KiB

gap

#include "gap.h"
#include <bits/stdc++.h>
#define F first
#define S second
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define V vector
#define ALL(v) (v).begin(), (v).end()

using namespace std;

typedef long long ll;
typedef pair<int, int> pi;
typedef V<int> vi;

long long findGap(int T, int N)
{	
	if(T == 1) {
		int l = 1, r = N;
		ll lb = 0, rb = 1e18;
		V<ll> v(N + 1);
		while(l <= r) {
			ll mn, mx;
			MinMax(lb, rb, &mn, &mx);
			v[l] = mn, v[r] = mx;
			l++, r--;
			lb = mn+1, rb = mx-1;
		}
		ll ans = 0;
		for(int i = 1; i < N; i++) ans = max(ans, v[i+1]-v[i]);
		return ans;
	} else {
		V<ll> v;
		function<void(ll, ll)> go = [&](ll lb, ll rb) {
			ll mn, mx;
			MinMax(lb, rb, &mn, &mx);
			ll mb = (lb + rb) / 2;
			if(mn == mx) {
				if(mn != -1) v.PB(mn);
			} else {
				go(lb, mb);
				go(mb+1, rb);
			}
		};
		go(0, 1e18);
		sort(ALL(v));
		assert(v.size() == N);
		ll ans = 0;
		for(int i = 0; i < N - 1; i++) ans = max(ans, v[i+1]-v[i]);
		return ans;
	}
}

Compilation message (stderr)

In file included from /usr/include/c++/9/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:33,
                 from gap.cpp:2:
gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:48:19: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   48 |   assert(v.size() == N);
      |          ~~~~~~~~~^~~~

• Subtask 1: 30 / 30
• Subtask 2: 8.4499696011 / 70