Submission #928271

#	Time	Username	Problem	Language	Result	Execution time	Memory
928271		Amr	Rabbit Carrot (LMIO19_triusis)	C++14	63 / 100	169 ms	16724 KiB

triusis

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define S second
#define F first
#define all(x) (x).begin(),(x).end()
#define sz size()
#define Yes cout << "YES" << endl
#define No cout << "NO" << endl
#define pb(x) push_back(x);
#define endl '\n'
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const int N=3e5+7;
ll INF=INT_MAX,mod=1e9+7;
int TT=1;
ll power(ll x, unsigned int y)
{
    ll res = 1;
    x = x; // % mod;
    if (x == 0) return 0;
    while (y > 0)
    {
        if (y & 1) res = (res*x)  ; // % mod;
        y = y>>1;
        x = (x*x) ; // % mod;
    }
    return res;
}
ll n , m;
ll a[N];
map<ll,int>  mp;
ll bit[N];
void upd(ll x,ll val)
{
    while(x<=n)
    {
        bit[x] = max(bit[x],val);
        x +=(x&(-x));
    }
    return;
}
ll get(ll x)
{
    ll res = 0;
    while(x> 0)
    {
        res = max(res,bit[x]);
        x-= (x&(-x));
    }
    return res;
}
void solve()
{
    ll ans = 0;
     cin >> n >> m;
    for(int i = 1; i <= n; i++) cin >> a[i];
    if(a[1]>m) {ans++,a[1] = m;}
    for(int i = 1; i <= n ;i++){
        a[i] -= (i)*m;
        mp[a[i]] = 1;
    }
    ll cnt = 1;
    for(auto it: mp)
        mp[it.first] = cnt++;
    for(int i = n; i>=2; i--)
    {
        ll x = mp[a[i]];
        //cout << x << endl;
        ll y = get(x);
        upd(x,y+1);
    }
    cout << (n-1)-get(mp[a[1]])+ans << endl;
}
int main(){
    //freopen("friday.in","r",stdin);
    //freopen("friday.out","w",stdout);
    fast;
    while(TT--)
        solve();

    return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 28 / 28
• Subtask 4: 0 / 37