Submission #47963

#	Time	Username	Problem	Language	Result	Execution time	Memory
47963		3zp	Gap (APIO16_gap)	C++14	70 / 100	72 ms	2640 KiB

gap

#include "gap.h"
#define ll long long
#include<bits/stdc++.h>
using namespace std;
long long findGap(int T, int N)
{
    if(T == 1){
        ll s=-1, t=1e18+1;
        vector<ll> v;
        for(int i= 0; i < (N+1)/2; i++){
            MinMax(s+1, t-1, &s, &t);
            if(s == -1) break;
            else v.push_back(s),v.push_back(t);
        }
        sort(v.begin(),v.end());
        ll ans = 0;
        for(int i= 1; i < v.size(); i++)
            ans=max(ans, v[i]-v[i-1]);
        return ans;
    }
    ll s, t;
    MinMax(0, 1e18, &s, &t);
    ll L = t - s;
    ll d = (L+N-2) / (N - 1);
    ll ans = d;
    d++;
    ll x = s;
    while(x != t){
        ll p, q;
        if(x + d >= t) break;
         MinMax(x + 1, x + d, &p , &q);
        if(q != -1) {
            ans = max(ans, x - p);
            x = q;
            continue;
        }
        int w = 2;
        while(1){

            MinMax(x + 1,min( x + w * d, (ll)1e18),&p , &q);
            if(q == -1) {w++; continue;}
            ans = max(ans, p - x);
            d = ans;
            x = q;
            break;
        }
    }
    return ans;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:17:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i= 1; i < v.size(); i++)
                       ~~^~~~~~~~~~

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