Submission #82257

#	Time	Username	Problem	Language	Result	Execution time	Memory
82257		Bodo171	Gap (APIO16_gap)	C++14	30 / 100	67 ms	2472 KiB

gap

#include "gap.h"
#include <iostream>
#include <climits>
using namespace std;
const int nmax=100005;
long long v[nmax];
long long mx,st,dr,act,len,oldlen,inf,sup;
int n,i;
long long findGap(int T, int N)
{
    n=N;
    if(T==1)
    {
        mx=0;
        v[0]=-1;v[n+1]=1LL*1e18;
        v[n+1]++;//don't mess with 1e18
        for(i=1;i<=n/2;i++)
        {
            MinMax(v[i-1]+1,v[n-i+2]-1,&v[i],&v[n-i+1]);
        }
        if((n&1))
        {
            MinMax(v[n/2]+1,v[n/2+2]-1,&v[(n+1)/2],&sup);
        }
        for(i=1;i<n;i++)
            mx=1LL*max(mx,1LL*v[i+1]-v[i]);
        return mx;
    }
    act=-1;len=1;oldlen=1;
    bool bun=1;
    long long mare=1LL*1e18;
    MinMax(0,mare,&inf,&sup);
    long long nn=n,ans=0;
    long long def=(sup-inf)/(nn-1);
    if((sup-inf)%(nn-1))
        def++;
    act=inf;
    for(long long i=1;i<=n-1;i++)
    {
        bool ok=1;
        while(ok&&i*def<=LLONG_MAX-act&&act+1LL*(i-1)*def<sup)
        {
            ok=0;
            if(act!=-1)oldlen=len;
            MinMax(act+1,min(act+1LL*i*def,mare),&st,&dr);
            if(dr!=-1)
            {
                ans=max(st-act,ans);
                act=dr;
                ok=1;
            }
        }
    }
	return ans;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:30:10: warning: unused variable 'bun' [-Wunused-variable]
     bool bun=1;
          ^~~

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