Submission #221353

#	Time	Username	Problem	Language	Result	Execution time	Memory
221353		zoooma13	Gap (APIO16_gap)	C++14	72.60 / 100	61 ms	1956 KiB

gap

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

long long MAX_A = 1e18;

long long findGap(int T, int N){
    if(N <= 20 || T == 1){
        vector <long long> A(N);
        MinMax(0 ,1e18 ,&A[0] ,&A[N-1]);
        for(int i=1; i<(N+1)/2; i++)
            MinMax(A[i-1]+1 ,A[N-i]-1 ,&A[i] ,&A[N-i-1]);
        long long ret = 1;
        for(int i=1; i<N; i++)
            ret = max(ret ,A[i]-A[i-1]);
        return ret;
    }

    long long lst = 0, mx_dist = 1;
    if(N <= 60)
        MinMax(0 ,1e18 ,&lst ,&MAX_A);
    else
    for(long long mn ,mx ,d=1; ; d<<=1){
        MinMax(0 ,d ,&mn ,&mx);
        if(mn != -1){
            lst = mn;
            break;
        }
    }

    for(int ok=1; ok; )
    {
        for(long long mn,mx ,nxt=mx_dist+1; ok; nxt<<=1){
            MinMax(lst+1 ,min(MAX_A ,lst+nxt) ,&mn ,&mx);
            if(lst+nxt >= MAX_A)
                ok = 0;
            if(mn != -1){
                mx_dist = max(mx_dist ,mn-lst);
                lst = mx;
                break;
            }
        }
    }

	return mx_dist;
}

• Subtask 1: 30 / 30
• Subtask 2: 42.603986447 / 70