Submission #200825

#	Time	Username	Problem	Language	Result	Execution time	Memory
200825		Rakhmand	Gap (APIO16_gap)	C++14	100 / 100	79 ms	3308 KiB

gap

#include "gap.h"

#include <cstring>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <queue>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cassert>
#include <iterator>

using namespace std;
typedef long long llong;

long long a[100010];
long long ans;
set<llong> st;
llong n;

void get(llong l, llong r){
    if(ans >= r - l){
        return ;
    }
    llong sz = (r - l + n - 1) / n;
    llong last = l;
    vector<pair<llong, llong> > vec;
    for(llong tl = l; tl < r; tl += sz + 1){
        llong tr = min(tl + sz, r - 1);
        llong mn = NULL, mx = NULL;
        MinMax(tl, tr, &mn, &mx);
        if(mn == -1){
            continue;
        }
        ans = max(ans, mn - last);
        vec.push_back({mn, mx});
        last = mx;
    }
    ans = max(r - last, ans);
    for(int i = 0; i < vec.size(); i++){
        get(vec[i].first, vec[i].second);
    }
}

long long findGap(int T, int N) {
    n = N;
    if(T == 1){
        int L = 1, R = N;
        long long l = 0, r = 1e18;
        while(R >= L){
            long long mn = NULL, mx = NULL;
            MinMax(l, r, &mn, &mx);
            a[L++] = mn;
            a[R--] = mx;
            l = mn + 1;
            r = mx - 1;
        }
        for(int i = 1; i < N; i++){
            if(a[i + 1] - a[i] > ans){
                ans = a[i + 1] - a[i];
            }
        }
        return ans;
    }else{
        llong mn = NULL, mx = NULL;
        MinMax(1, (llong) 1e18, &mn, &mx);
        get(mn, mx);
        return ans;
    }
    return 0;
}

Compilation message (stderr)

gap.cpp: In function 'void get(llong, llong)':
gap.cpp:43:20: warning: converting to non-pointer type 'llong {aka long long int}' from NULL [-Wconversion-null]
         llong mn = NULL, mx = NULL;
                    ^~~~
gap.cpp:43:31: warning: converting to non-pointer type 'llong {aka long long int}' from NULL [-Wconversion-null]
         llong mn = NULL, mx = NULL;
                               ^~~~
gap.cpp:53:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < vec.size(); i++){
                    ~~^~~~~~~~~~~~
gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:64:28: warning: converting to non-pointer type 'long long int' from NULL [-Wconversion-null]
             long long mn = NULL, mx = NULL;
                            ^~~~
gap.cpp:64:39: warning: converting to non-pointer type 'long long int' from NULL [-Wconversion-null]
             long long mn = NULL, mx = NULL;
                                       ^~~~
gap.cpp:78:20: warning: converting to non-pointer type 'llong {aka long long int}' from NULL [-Wconversion-null]
         llong mn = NULL, mx = NULL;
                    ^~~~
gap.cpp:78:31: warning: converting to non-pointer type 'llong {aka long long int}' from NULL [-Wconversion-null]
         llong mn = NULL, mx = NULL;
                               ^~~~

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