Submission #1085042

#	Time	Username	Problem	Language	Result	Execution time	Memory
1085042		Timosh	Gap (APIO16_gap)	C++17	30 / 100	63 ms	5848 KiB

gap

#include <bits/stdc++.h>
#include "gap.h"
using namespace std;

long long mn = 0, mx = 0;
set<long long> st;
void gen(long long l, long long r)
{
	MinMax(l, r, &mn, &mx);
	if (mn == -1)
		return;
	st.insert(mn);
	st.insert(mx);
	if (mn == mx)
		return;
	l = mn + 1, r = mx - 1;
	gen(l, (l + r) / 2);
	gen((l + r) / 2 + 1, r);
}

long long findGap(int T, int N)
{
	long long ans = 1;
	if (T == 2)
	{
		gen(0, 1e18);
	}
	else
	{
		long long l = 0, r = 1e18;
		while (1)
		{
			MinMax(l, r, &mn, &mx);
			if (mn == -1)
				break;
			st.insert(mn);
			st.insert(mx);
			l = mn + 1, r = mx - 1;
			if (mn == mx || st.size() >= N)
				break;
		}
	}
	long long last = *st.begin();
	for (auto &i : st)
		ans = max(ans, i - last), last = i;
	return ans;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:39:30: warning: comparison of integer expressions of different signedness: 'std::set<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   39 |    if (mn == mx || st.size() >= N)
      |                    ~~~~~~~~~~^~~~

• Subtask 1: 30 / 30
• Subtask 2: 0 / 70