Submission #522118

#	Time	Username	Problem	Language	Result	Execution time	Memory
522118		SharpEdged	Rabbit Carrot (LMIO19_triusis)	C++17	100 / 100	31 ms	6980 KiB

triusis

#include <bits/stdc++.h>
 
using namespace std;
 
#define f first
#define s second
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define LSB(x) ((x) & -(x))
#define sz(x) (int)(x.size())
#define uid(a, b) uniform_int_distribution<int>(a, b)(rng)
 
typedef long long ll;
typedef long double ld;
 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
 
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
 
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ", "; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? ", " : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef DEBUG
#define dbg(x...) cerr << "\e[DEBUG] "<<__func__<<": "<<__LINE__<<", [" << #x << "] = ["; _print(x);
#else
#define dbg(x...)
#endif

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        // http://xorshift.di.unimi.it/splitmix64.c
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
    
    size_t operator()(string x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        uint64_t res = 0;
        for (int i = 0; i < sz(x); i++){
			res ^= x[i] + FIXED_RANDOM;
			res = splitmix64(res);
		}
        return res;
    }
};

const char nl = '\n';
 
const int INF = 1e9 + 5;
const int mxN = 1e3 + 5;

const ll MOD = 1e9+7;

void TestCase(){
	int n, m;
	cin >> n >> m;
	vector<ll> v(n);
	for (int i = 0; i < n; i++) cin >> v[i];
	
	vector<ll> vals;
	for (int i = 0; i < n; i++){
		if ((i+1) * m >= v[i]) vals.pb(v[i] - m * (i + 1));
	}
	
	reverse(all(vals));
	
	int mx = 0;
	vector<ll> d(n+1, INF);
	d[0] = -INF;
	for (int i = 0; i < sz(vals); i++){
		int pos = upper_bound(all(d), vals[i]) - d.begin();
		if (d[pos-1] <= vals[i] && vals[i] < d[pos]){
			d[pos] = vals[i];
			mx = max(mx, pos);
		}
	}
	
	cout << n - mx << nl;
}
 
int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;
	//cin >> t;
	while (t--){
		TestCase();
	}
	return 0;
}

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