Submission #1262820

#	Time	Username	Problem	Language	Result	Execution time	Memory
1262820		yf_yusuf	Gap (APIO16_gap)	C++20	30 / 100	41 ms	1864 KiB

gap

#include "gap.h"
//```//    YF YUSUF
#define YF ios_base::sync_with_stdio(0);cout.setf(ios::fixed);
#define YUSUF cout.precision(0);cout.tie(0);cin.tie(0);
// #include <bits/stdc++.h>
#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <cmath>
#include <numeric>
#include <queue>
#include <stack>
#include <cassert>
#include <climits>
#include <string>
#include <cstdlib>
#include <random>
#include <ctime>
using namespace std;
#ifdef YF_CHECK
	bool Output=1;
#else
	#pragma GCC optimize ("unroll-loops")
	#pragma GCC optimize ("inline")
	#pragma GCC optimize ("Ofast")
	#pragma GCC optimize ("O3")
	bool Output=0;
#endif
using ll   = long long;
using ld   = long double;
using sll  = set <ll>;
using vll  = vector <ll>;
using mll  = map <ll,ll>;
using pll  = pair <ll,ll>;
using vvl  = vector <vll>;
using vpll = vector <pll>;
template<class T>T MIN(T&a,T b){a=min(a,b);return a;}
template<class T>T MAX(T&a,T b){a=max(a,b);return a;}
#define all(a) a.begin(),a.end()
#define sgr v+v+1,(tl+tr)/2+1,tr
#define sgl v+v,tl,(tl+tr)/2
#define pb push_back
#define ins insert
#define S second
#define F first
mt19937_64 MT(time(0));
ll BP(ll a,ll b,ll mod=1e9+7){
	if(b==0)return 1;
	ll q=BP(a,b/2,mod);
	return ((q*q)%mod*(b%2?a:1ll))%mod;
}
ll f(ll x){return x*(x+1)/2;}
ll dup(ll a,ll b){return (a+b-1)/b;}
ll lcm(ll a,ll b){return a/__gcd(a,b)*b;}
ll invf(ll x){return (-1+sqrt(1+8*x))/2;}
const ll  mod=998244353;
const ll  INF=1e18;
const ll  inf=1e9+7;
const ll  N  =1e6+7;
ll YF_SOLVE(ll n){
	ll mn,mx;
	MinMax(0, (ll)(1e18), &mn, &mx);
	ll range = mx - mn;
	ll seg = (range + n - 1) / (n - 1);
	ll ans = seg, i = mn, last = mn, x, y;
	for(;i + seg < mx; i += seg - 1){
		MinMax(i, i + seg, &x, &y);
		if(x != -1){
			MAX(ans, x - last);
			last = y;
		}
	}
	MinMax(i, mx, &x, &y);
	if(x != -1)MAX(ans, x - last);
	cout<<ans;
}
ll YF_MAIN(ll n){
	vll a(n+1);
	{
		ll l = 0ll, r = (1000000000000000000LL);
		MinMax(l, r, &a[1], &a[n]);
	}
	ll l=2,r=n-1;
	while(l<=r){
		MinMax(a[l-1]+1, a[r+1]-1, &a[l], &a[r]);
		l++;
		r--;
	}
	ll mx = 0ll;
	for(int i=2;i<min(n+1, (ll)a.size());i++){
		MAX(mx, a[i] - a[i-1]);
	}
	return mx;
}
ll lg(ll x){return (x ? 63 - __builtin_clzll(x) : -1);}
const ll SN=2e0 + 7; ll SM[SN];
const ll FN=2e0 + 7; ll FACT[FN], inv[FN], FMOD=inf;
ll PER(ll n,ll k){return FACT[n] *inv[n-k]%FMOD;}
ll CNK(ll n,ll k){return PER(n,k)*inv[k  ]%FMOD;}
void BEFORE(){
	for(ll i=2;i<SN;i++){
		if(SM[i])continue;
		for(ll j=i;j<SN;j+=i)
			MAX(SM[j],i);
	}
	FACT[0]=inv[0]=1;
	for(int i=1;i<FN;i++){
		FACT[i]=FACT[i-1]*i%FMOD;
		if(i<5e5+7)inv[i]=BP(FACT[i],FMOD-2,FMOD);
	}
}
ll findGap(int T, int N)
{
	YF YUSUF
	return (T==1 ? YF_MAIN(N) : YF_SOLVE(N));
}

Compilation message (stderr)

gap.cpp: In function 'll YF_SOLVE(ll)':
gap.cpp:78:1: warning: no return statement in function returning non-void [-Wreturn-type]
   78 | }
      | ^

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