Submission #81224

#	Time	Username	Problem	Language	Result	Execution time	Memory
81224		AngelKnows	Gap (APIO16_gap)	C++14	30 / 100	67 ms	2144 KiB

gap

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

#define ll long long
ll mn,mx;
ll l,r,mid;
ll a[100005];
int h,t;
ll ans;
unsigned long long now,pre;
unsigned long long len;
long long findGap(int T, int N)
{
	if (T==1) {
		h=0,t=N+1;
		l=0,r=1e18+1;
		for (;;) {
			MinMax(l,r,&mn,&mx);
			a[++h]=mn,a[--t]=mx;
			l=mn+1,r=mx-1;
			if (h>=t-1) break;
		}
		for (int i=1;i<=N-1;i++) {
			ll t=a[i+1]-a[i];
			if (t>ans) ans=t;
		}
	} else {
		MinMax(0,1e18+1,&mn,&mx);
		now=mn;
		len=1;
		pre=mn;
		ll top=mx;
		ll d=1;
		while (now+1<=top) {
			MinMax(now+d,now+len,&mn,&mx);
			if (mn==-1) {
				now+=len;
				d=1;
				len*=2;
			} else {
				ans=max(ans,mn-(ll)pre);
				d=now+len-mx+1;
				now=mx;
				pre=mx;
				d=1;
			}
		}
	}
	return ans;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:35:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while (now+1<=top) {
          ~~~~~^~~~~

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