Submission #155835

#	Time	Username	Problem	Language	Result	Execution time	Memory
155835		m1sch3f	Rice Hub (IOI11_ricehub)	C++17	17 / 100	257 ms	2936 KiB

ricehub

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

// types - only for stuff used a lot 
using ll = long long;
#define vv vector
#define Pp pair

// IO
#define get(x) scanf("%d",&x)
#define getl(x) scanf("%lld",&x);

// Operations
#define pb push_back
#define pob pop_back
#define sz(a) int(a.size()) 
#define re(a,b) a=max(a,b) // relax
#define ri(a,b) a=min(a,b) // relaxi

// Debugging

#ifndef LOCAL
#define cerr if (0) cerr
#else
#define cerr cout
#endif

#define print(arr,n) {for (int _ = 0; _ < n; _++) cerr<<arr[_]<<" "; cerr << endl; }
#define printv(vec)  {for (int _ : vec) cerr<<_<<" "; cerr<<endl;}

const int mod = 1e9+7, oo = 1e9;
const ll loo = 1e18;

// Functions 
ll modpow(ll a, ll b) {
	ll ans = 1; // faster modpow than recursive
	for (; b; b/=2,a=a*a%mod)
		if (b&1) ans = (ans*a)%mod;
	return ans;
}
ll gcd(ll a, ll b) {
	while (a) b%=a,swap(a,b);
	return b;
}
#define bitcount __builtin_popcountll
#define f(i,a,b) for (int i = a; i < b; i++)
#define fr(i,a,b) for (int i = b-1; i >= a; i--)


/* 

   ALRIGHT HACKERS, THIS IS WHERE THE ACTUAL CODE BEGINS

 */

const bool DEBUG = 1;

using pll = pair<ll,ll>;

int besthub(int N, int L, int rem[], ll B) {
	ll C[N];
	f(i,0,N) C[i] = i?rem[i]+C[i-1]:rem[i];
	vector<int> X(N);
	f(i,0,N) X[i] = rem[i];
	auto sum = [&](int i, int j) {
		if (i>j) return 0LL;
		return C[j]-(i?C[i-1]:0);
	};
	auto fu = [&](int i, int l) {
		// to the left
		int x = lower_bound(begin(X),end(X),X[i]-l)-begin(X);
		int y = upper_bound(begin(X),end(X),X[i]+l)-begin(X)-1;
		return pll(1LL*(i-x)*X[i]-sum(x,i-1)+
				sum(i+1,y)-1LL*(y-i)*X[i],y-x+1);
	};
	ll ans = 0;
	f(i,0,N) {
		int lo = 0, hi = L;		
		while (lo <= hi) {
			int mid = lo+hi>>1;
			if (fu(i,mid).first <= B)
				lo = mid+1;
			else hi = mid-1;
		}
		re(ans,fu(i,hi).second);
	}	
	return ans;
}

Compilation message (stderr)

ricehub.cpp: In function 'int besthub(int, int, int*, ll)':
ricehub.cpp:82:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    int mid = lo+hi>>1;
              ~~^~~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 25
• Subtask 3: 0 / 26
• Subtask 4: 0 / 32