Submission #715450

#	Time	Username	Problem	Language	Result	Execution time	Memory
715450		study	Gap (APIO16_gap)	C++17	30 / 100	63 ms	2284 KiB

gap

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

long long findGap(int T, int N){
	if (T == 1 or N == 2){
		ll pmini = 0, pmaxi = 1e18+2;
		vector<ll> ans;
		for (int i=0; i<(N+1)/2; ++i){
			long long a,b;
			MinMax(pmini,pmaxi,&a,&b);
			ans.emplace_back(a);
			ans.emplace_back(b);
			pmini = a+1;
			pmaxi = b-1;
		}
		sort(ans.begin(),ans.end());
		ll res = 0;
		for (int i=1; i<ans.size(); ++i){
			res = max(res,ans[i]-ans[i-1]);
		}
		return res;
	}
	else{
		ll mini,maxi, MAX_VAL = 1e18;
		MinMax(0ll,MAX_VAL,&mini,&maxi);
		ll block_siz = (maxi-mini-1)/(N-1), prev = mini, ans = 0;
		for (ll i=mini+1; i<=maxi-1; i += block_siz+1){
			ll a,b;
			MinMax(i,i+block_siz-1,&a,&b);
			if (a != -1) ans = max(ans,a-prev);
			if (b != -1) prev = b;
		}
		return ans;
	}
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:20:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |   for (int i=1; i<ans.size(); ++i){
      |                 ~^~~~~~~~~~~

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