Submission #109436

#	Time	Username	Problem	Language	Result	Execution time	Memory
109436		Plurm	Gap (APIO16_gap)	C++11	42.81 / 100	95 ms	7044 KiB

gap

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

set<long long> s;
void recur(const int& N, long long lo, long long hi){
    if(lo > hi) return;
    if(s.size() == N) return;
    long long mn, mx;
    MinMax(lo, hi, &mn, &mx);
    if(mn == -1ll) return;
    s.insert(mn);
    s.insert(mx);
    long long mid = (mn + mx)/2ll;
    recur(N, mn+1, mid);
    recur(N, mid, mx-1);
}
long long findGap(int T, int N)
{
    long long mn, mx;
    if(T == 1){
        long long lo = 0ll;
        long long hi = 1e18;
        do{
            MinMax(lo, hi, &mn, &mx);
            if(mn == -1) break;
            s.insert(mn);
            s.insert(mx);
            lo = mn + 1;
            hi = mx - 1;
        }while(lo <= hi && s.size() < N);
    }else{
        recur(N, 0ll, (long long)1e18);
    }
    vector<long long> v;
    for(long long x : s) v.push_back(x);
    mx = 0ll;
    for(int i = 1; i < N; i++){
        mx = max(mx, v[i] - v[i-1]);
    }
    return mx;
	return 0;
}

Compilation message (stderr)

gap.cpp: In function 'void recur(const int&, long long int, long long int)':
gap.cpp:8:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(s.size() == N) return;
        ~~~~~~~~~^~~~
gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:31:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         }while(lo <= hi && s.size() < N);
                            ~~~~~~~~~^~~

• Subtask 1: 30 / 30
• Subtask 2: 12.8143110074 / 70