Submission #993851

#	Time	Username	Problem	Language	Result	Execution time	Memory
993851		midi	Dancing Elephants (IOI11_elephants)	C++17	50 / 100	9066 ms	12240 KiB

elephants

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

typedef long long ll;
typedef long double ld;
#define vc vector
typedef vc<ll> vcll;
typedef vc<bool> vcb;
#define pr pair
typedef pr<ll, ll> prll;
typedef set<ll> setll;
typedef map<ll,ll> mapll;
#define uset unordered_set
typedef uset<ll> usetll;
#define umap unordered_map
typedef umap<ll,ll> umapll;

#define f0r(i,a,n) for ((i)=(a); (i)<=(n); (i)++)
#define r0f(i,n,a) for ((i)=(n); (i)>=(a); (i)--)

#define pb push_back
#define ppb pop_back
#define pf push_front
#define ppf pop_front
#define mp make_pair
#define fi first
#define se second
#define sz size
#define all(x) (x).begin(), (x).end()
#define all0(x, n) (x).begin(), (x).begin()+n
#define all1(x, n) (x).begin()+1, (x).begin()+n+1
#define allrev(x) (x).rbegin(), (x).rend()
#define in(v, s) ((s).find((v)) != (s).end())
#define GCD(x, y) __gcd(abs((x)), abs((y)))

#define INF (LLONG_MAX>>3ll)
#define MOD (1'000'000'007ll)

#define mxN (150'010ll)

inline void maxa(ll &a, ll b) { if (a<b) a=b; }
inline void mina(ll &a, ll b) { if (a>b) a=b; }

inline void print (vcll &a, ll n=-1, string name="")
{
	cout << name << ": ";
	if (n==-1) for (ll x:a) printf("%lli ", x);
	else
	{
		ll i;
		f0r(i,1,n) printf("%lli ", a[i]);
	}
	printf("\n");
}

ll n, L;
vcll ar(mxN);
vcll nums;

inline void ins (ll x)
{
	if (nums.empty()) return void (nums.pb(x));
	nums.pb(0);
	ll i;
	for (i=nums.sz()-1; i>=1 and nums[i-1] > x; i--)
		nums[i]=nums[i-1];
	nums[i]=x;
	// print (nums, n, "nums");
}

inline void del (ll x)
{
	ll i;
	for (i=0; nums[i]!=x; i++) ;
	f0r(i,i+1,nums.sz()-1) nums[i-1]=nums[i];
	nums.ppb();
}

inline ll calc()
{
	ll c=0, last=-INF;
	for (ll x:nums)
	{
		if (x-last > L)
		{
			last=x;
			c++;
		}
	}
	return c;
}

void init (int N, int l, int *X)
{
	n=N; L=l;
	ll i;
	f0r(i,0,n-1) ins(ar[i+1] = X[i]);
}

int update (int i, int x)
{
	i++;
	del(ar[i]);
	ins(ar[i]=x);
	return calc();
}

Compilation message (stderr)

elephants.cpp: In function 'void del(ll)':
elephants.cpp:19:37: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 | #define f0r(i,a,n) for ((i)=(a); (i)<=(n); (i)++)
      |                                  ~~~^~~~~
elephants.cpp:76:2: note: in expansion of macro 'f0r'
   76 |  f0r(i,i+1,nums.sz()-1) nums[i-1]=nums[i];
      |  ^~~

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 24 / 24
• Subtask 4: 0 / 47
• Subtask 5: 0 / 3