Submission #910441

#	Time	Username	Problem	Language	Result	Execution time	Memory
910441		ibm2006	Gap (APIO16_gap)	C++17	30 / 100	48 ms	3444 KiB

gap

#include "gap.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
ll n,s,l,r,x,y,z,w,a[1100000],i,j,k,m,mx,gap;
long long findGap(int T, int N)
{
    n=N;
    if(T==1)
    {
        l=0;
        r=1e18-1;
        x=1;
        y=n;
        while(l<r)
        {
            MinMax(l,r,&l,&r);
            a[x]=l;
            a[y]=r;
            x++;
            y--;
            if(l==r||x>y)
                break;
            l++;
            r--;
        }
        for(i=1;i<n;i++)
        {
            s=max(s,a[i+1]-a[i]);
        }
        return s;
    }
    l=0;
    r=1e18-1;
    MinMax(l,r,&x,&y);
	gap=(y-x)/(n-1);
	l=x+1;
	mx=l;
	while(1)
    {
        r=min(l+gap-1,y-1);
        //printf("(%lld,%lld)\n",l,r);
        MinMax(l,r,&z,&w);
        if(z==-1)
        {
            l+=gap;
            if(l>=y)
                break;
            continue;
        }
        s=max(s,z-mx);
        mx=w;
        l+=gap;
        if(l>=y)
            break;
    }
    s=max(s,r-mx);
    return s;
}

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