Submission #96034

#	Time	Username	Problem	Language	Result	Execution time	Memory
96034		lyc	Gap (APIO16_gap)	C++14	100 / 100	63 ms	4452 KiB

gap

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

typedef long long ll;

long long findGap(int T, int N)
{
    ll ans = 0;
    ll s, t, mn, mx;
    if (T == 1) {
        s = 0, t = (ll)1e18;
        ll arr[N];
        for (int i = 0; i < (N+1)/2; ++i) {
            MinMax(s, t, &mn, &mx);
            arr[i] = mn;
            arr[N-1-i] = mx;
            s = mn+1;
            t = mx-1;
            //cout << "FOUND " << mn << " " << mx << '\n';
        }
        //for (int i = 0; i < N; ++i) cout << arr[i] << ' ' ;cout << endl;

        for (int i = 1; i < N; ++i) {
            ans = max(ans, arr[i]-arr[i-1]);
        }
    }
    else {
        s = 0, t = (ll)1e18;
        vector<ll> v;
        MinMax(s, t, &mn, &mx);
        s = mn, t = mx;
        v.push_back(s);

        ll mingap = (mx-mn+N-2)/(N-1);
        for (ll x = s+1; x < t; x = x+mingap+1) {
            MinMax(x, x+mingap, &mn, &mx);
            //cout << "CALL " << x << " " << x+mingap << ":: " << mn << " " << mx << endl;
            if (mn != -1) {
                v.push_back(mn);
                v.push_back(mx);
            }
        }
        v.push_back(t);

        //for (auto x : v) cout << x << ' ' ; cout << endl;
        for (int i = 1; i < v.size(); ++i) {
            ans = max(ans, v[i]-v[i-1]);
        }
    }
	return ans;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:47:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 1; i < v.size(); ++i) {
                         ~~^~~~~~~~~~

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