Submission #158005

#	Time	Username	Problem	Language	Result	Execution time	Memory
158005		hentai_lover	Money (IZhO17_money)	C++14	45 / 100	605 ms	22928 KiB

money

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

#define lft(x) x * 2
#define rgt(x) x * 2 + 1

#define tm hui_pizda
#define ft first
#define sd second
#define pb push_back
#define pf push_front
#define sz size()
#define cnt continue
#define m_p make_pair
#define fr(i, l, r) for(int i = l; i <= r; ++ i)
#define rf(i, r, l) for(int i = r; i >= l; -- i)
#define all(x) x.begin(), x.end()
#pragma GCC optimize(-O3)
#pragma GCC optimize(Ofast)
#pragma GCC optimize("unroll-loops")

using namespace __gnu_pbds;
using namespace std;

template <typename T>
using _set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

typedef long long ll;
typedef long double ld;

typedef pair <ll, ll> pll;
typedef pair <int, int> pii;
typedef vector <int> vi;
typedef vector <ll> vl;
typedef vector <pii> vpi;
typedef vector <pll> vpl;

mt19937_64 rnd(time(NULL));

const ll N = 1e6;
const ll mtrxN = 10;
const ll oo = 1e18 + 10;
const ll B = 500;
const ll mod = 1e9 + 7;

struct mtrx{
    ll m[mtrxN][mtrxN] = {};
};
mtrx mtrx_mult(mtrx a, mtrx b){
    mtrx c;
    fr(i, 0, mtrxN - 1){
        fr(j, 0, mtrxN - 1){
            ll sum = 0;
            fr(x, 0, mtrxN - 1){
                sum += a.m[i][x] * b.m[x][j];
                sum %= mod;
            }
            c.m[i][j] = sum;
        }
    }
    return c;
}
mtrx mtrx_pow(mtrx a, ll n){
    mtrx res;
    fr(i, 0, mtrxN - 1)fr(j, 0, mtrxN - 1)res.m[i][j] = a.m[i][j];
    n --;
    while(n){
        if(n&1)res = mtrx_mult(res, a);
        a = mtrx_mult(a, a);
        n >>= 1;
    }
    return res;
}
ll _pow(ll a, ll n){
    ll r = 1;
    while(n){
        if(n&1)r = r * a % mod;
        a = a * a % mod;
        n >>= 1;
    }
    return r;
}
ll div(ll x, ll y, ll md){
    return x * _pow(y, md - 2) % md;
}

ll dp[N], a[N];
ll n;
set <ll> s;

int main(){
    //NN = 10000;
    cin >> n;
    fr(i, 1, n)cin >> a[i];
    fr(i, 1, n)dp[i] = oo;
    dp[0] = 0;
    fr(i, 0, n - 1){
        ll lt = -1;
        //cout << i << endl;
        fr(j, i + 1, n){
            if(lt > a[j])break;
            lt = a[j];
            auto t = s.upper_bound(a[i + 1]);
            if(t != s.end() && *t < lt)break;

            //cout << "              " << j << endl;

            dp[j] = min(dp[j], dp[i] + 1);
        }
        s.insert(a[i + 1]);
    }
//    fr(i, 1, n)cout << dp[i] << ' ';
//    cout << endl;
    cout << dp[n] << endl;

    return 0;
}
/*
6
1 2 5 3 4 6
*/

Compilation message (stderr)

money.cpp:18:22: warning: '#pragma GCC optimize' is not a string or number [-Wpragmas]
 #pragma GCC optimize(-O3)
                      ^
money.cpp:19:22: warning: '#pragma GCC optimize' is not a string or number [-Wpragmas]
 #pragma GCC optimize(Ofast)
                      ^~~~~

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 0 / 55