Submission #238091

#	Time	Username	Problem	Language	Result	Execution time	Memory
238091		DS007	Gap (APIO16_gap)	C++14	30 / 100	91 ms	6008 KiB

gap

#include <bits/stdc++.h>
using namespace std;
#include "gap.h"
 
long long solve1(int n) {
    set<long long> s;
    long long l = 0, h = 1e18;
    while (s.size() != n) {
        long long mn = -1, mx = -1;
        MinMax(l, h, &mn, &mx);
        l = mn + 1, h = mx - 1;
        s.insert(mn);
        s.insert(mx);
    }
 
    long long last = 1e18, ans = 0;
    for (auto i : s) {
        ans = max(ans, i - last);
        last = i;
    }
 
    return ans;
}
 
long long solve2(int n) {
    long long mn = -1, mx = -1, l = 0, h = 1e18, tm1 = -1, tm2 = -1;
    MinMax(l, h, &mn, &mx);
 
    if (n == 2)
        return mx - mn;
 
    long long m = (mx - mn) / (n - 1), last = 1e18, ans = m;
    for (long long i = mn; i < mx; i += m + 1) {
        MinMax(i, i + m, &tm1, &tm2);
        ans = max(ans, tm1 - last);
        last = max(last, tm2);
    }
 
    return ans;
}
 
long long findGap(int t, int n) {
    if (t == 1)
        return solve1(n);
    else
        return solve2(n);
}

Compilation message (stderr)

gap.cpp: In function 'long long int solve1(int)':
gap.cpp:8:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while (s.size() != n) {
            ~~~~~~~~~^~~~

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