Submission #101703

#	Time	Username	Problem	Language	Result	Execution time	Memory
101703		ae04071	Gap (APIO16_gap)	C++11	100 / 100	90 ms	1276 KiB

gap

#include "gap.h"
#include <bits/stdc++.h>
#define fi first
#define se second
#define sz(x) ((int)(x).size())
using namespace std;
using lli=long long;
using pll=pair<lli,lli>;

const lli INF=1000000000000000000ll;

lli sub1(int n) {
    lli mx=0, lv=-1, rv=INF+1;
    for(int i=0;i<(n+1)/2;i++) {
        lli s=lv, t=rv, l, r;
        MinMax(s+1, t-1, &l, &r);
        if(i!=0) {
            mx = max(mx, l-lv);
            mx = max(mx, rv-r);
        }
        lv = l; rv = r;
    }
    if(!(n&1)) mx = max(mx, rv-lv);
    return mx;
}
lli sub2(int n) {
    lli s=0,f=INF,l,r;
    MinMax(s, f, &l, &r);
    
    lli seg = (r-l)/n,mx=0;
    s=l+1;
    while(s<r) {
        f = s+seg;
        if(f >= r) f=r-1;
        
        lli lv,rv;
        MinMax(s, f, &lv, &rv);
        if(lv!=-1) {
            mx = max(mx, lv-l);
            l = rv;
        }
        s=f+1;
    }
    mx = max(mx, r-l);
    return mx;
}

long long findGap(int T, int N)
{
    if(T==1) return sub1(N);
    else return sub2(N);
    
	return 0;
}

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