Submission #525955

#	Time	Username	Problem	Language	Result	Execution time	Memory
525955		vonatlus	Gap (APIO16_gap)	C++17	30 / 100	56 ms	1868 KiB

gap

#include "gap.h"

#pragma GCC optimize("O3")
//#pragma comment(linker, "/STACK:36777216")

#include<bits/stdc++.h>

#define x first
#define y second
#define pb push_back
#define sz(x) (int) x.size()
#define all(z) (z).begin(), (z).end()
 
using namespace std;

using ll = long long;
using pii = pair<int, int>;                                   

const int MOD = 1e9 + 7; 
const int INF = 1e9 + 1e2;
  
pair<ll, ll> ask(ll l, ll r) {
    ll nl, nr;
    MinMax(l, r, &nl, &nr);
    return {nl, nr};
}

long long findGap(int T, int n) {
    ll ans = 0;
    if (T == 1) {
        vector<ll> a(n);
        ll l = 0, r = 1e18;
        for (int i = 0; i < (n+1)/2; ++i) {
            ll nl, nr;
            MinMax(l, r, &nl, &nr);
            a[i] = nl;
            a[n-i-1] = nr;
            l = a[i]+1, r = a[n-i-1]-1;
        }
        for (int i = 1; i < n; ++i) {
            ans = max(ans, a[i]-a[i-1]);
        }
    } else {
        auto [x, y] = ask(0, 1e18);
        ll B = (y-x)/(n-1), prv = x;
        for (ll i = x; i <= y; i += B+1) {
            auto [a, b] = ask(i, i+B);
            if (a != -1) {
                ans = max(ans, a-prv);
                prv = b;
            }    
        }
    }
    return ans;
}

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