Submission #205755

#	Time	Username	Problem	Language	Result	Execution time	Memory
205755		mraron	Rabbit Carrot (LMIO19_triusis)	C++14	100 / 100	49 ms	7140 KiB

triusis

#include<iostream>
#include<vector>
#include<map>
#include<set>
#include<cassert>
#include<cassert>
#include<unordered_map>
#include<unordered_set>
#include<functional>
#include<queue>
#include<stack>
#include<cstring>
#include<algorithm>
#include<cmath>
#include<sstream>
#include<iomanip>
#include<cstdio>
#include<cstdlib>
#include<numeric>
#include<random>
#include<chrono>
#include<bitset>
using namespace std;

#define all(x) (x).begin(), (x).end()
#define pb push_back
#define xx first
#define yy second
#define sz(x) (int)(x).size()
#define gc getchar
#define IO ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define mp make_pair

#ifndef ONLINE_JUDGE
#  define LOG(x) (cerr << #x << " = " << (x) << endl)
#else
#  define LOG(x) ((void)0)
#endif

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

const double PI=3.1415926535897932384626433832795;
const ll INF = 1LL<<62;
const ll MINF = -1LL<<62;

template<typename T> T getint() {
	T val=0;
	char c;
	
	bool neg=false;
	while((c=gc()) && !(c>='0' && c<='9')) {
		neg|=c=='-';
	}

	do {
		val=(val*10)+c-'0';
	} while((c=gc()) && (c>='0' && c<='9'));

	return val*(neg?-1:1);
}

//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); uniform_int_distribution<int>(0, n-1)(rng)

#define int ll

main() {
	IO;
	int n,m;
	cin>>n>>m;
	vector<int> a(n);
	for(int i=0;i<n;++i) cin>>a[i];
	for(int i=0;i<n;++i) a[i]-=(i+1)*m;
	int ans=0;
	if(a[0]>0) {
		a[0]=0;
		ans++;
	}
	
	vector<int> lis, lis2;
	for(int i=n-1;i>=1;i--) {
		if(a[i]<=0) {
			auto it2=lower_bound(all(lis2), a[i]+1);
			if(it2==lis2.end()) lis2.pb(a[i]);
			else *it2=a[i];
		}
		
		if(a[i]>a[0]) continue ;
		auto it=lower_bound(all(lis), a[i]+1);
		if(it==lis.end()) lis.pb(a[i]);
		else *it=a[i];
	}
	
	cout<<min(ans+(n-1-sz(lis)), n-sz(lis2))<<"\n";
	
	return 0;
}

Compilation message (stderr)

triusis.cpp:68:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^

• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 28 / 28
• Subtask 4: 37 / 37