Submission #957976

#	Time	Username	Problem	Language	Result	Execution time	Memory
957976		Nika533	Rice Hub (IOI11_ricehub)	C++17	0 / 100	52 ms	1372 KiB

ricehub

#pragma GCC diagnostic warning "-std=c++11"
#include <bits/stdc++.h>
#include "ricehub.h"
#define pb push_back
#define f first
#define s second
#define MOD 1000000007
#define flush fflush(stdout)
#define all(x) (x).begin(),(x).end()
#define allr(x) (x).rbegin(), (x).rend()
#define pii pair<int,int>
using namespace std;
int m,T,k;

int besthub(int n, int L, int X[], long long B){
	set<pair<int,int>> s;
	long long pref[n+1]; pref[0]=0;
	for (int i=0; i<n; i++) {
		s.insert({X[i],i});
		pref[i+1]=pref[i]+X[i];
	}
	int ans=0;
	for (int i=0; i<n; i++) {
		int l=0,r=L+5,val;
		while (l<=r) {
			int mid=(l+r)/2;
			set<pii> :: iterator it2=s.upper_bound({X[i]+mid,n}),it1=s.lower_bound({X[i]-mid,0});
			it2--;
			long long a=(*it1).s,b=(*it2).s;
			long long num=X[i]; num*=(b+a-2*i);
			long long sum=(pref[b+1]-pref[i+1])-(pref[i]-pref[a])-num;
			if (sum<=B) {
				l=mid+1; val=num;
			}
			else {
				r=mid-1;
			}
			//cout<<"MID "<<mid<<" "<<num<<" "<<sum<<" "<<a<<" "<<b<<" "<<c<<" "<<d<<endl;
		} 
		//cout<<"I "<<val<<endl;
		ans=max(ans,val);
	}
	return ans;
}

Compilation message (stderr)

ricehub.cpp:1:32: warning: '-std=c++11' is not an option that controls warnings [-Wpragmas]
    1 | #pragma GCC diagnostic warning "-std=c++11"
      |                                ^~~~~~~~~~~~
ricehub.cpp: In function 'int besthub(int, int, int*, long long int)':
ricehub.cpp:24:17: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized]
   24 |   int l=0,r=L+5,val;
      |                 ^~~

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