Submission #339441

#	Time	Username	Problem	Language	Result	Execution time	Memory
339441		Dilshod_Imomov	Money (IZhO17_money)	C++17	100 / 100	1012 ms	48108 KiB

money

# include <bits/stdc++.h>
# define speed ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
# define int long long
# define fi first
# define se second
 
using namespace std;
 
const int N = 2e6 + 7;
const int mod = 1e9 + 7;

int a[N], t[4 * N], lz[4 * N];

void push( int v ) {
    lz[v * 2] += lz[v];
    lz[v * 2 + 1] += lz[v];
    t[v * 2] += lz[v];
    t[v * 2 + 1] += lz[v];
    lz[v] = 0;
}

void upd( int v, int l, int r, int pos ) {
    if ( l == r ) {
        t[v] ++;
        lz[v] ++;
        return;
    }
    int m = (l + r) / 2;
    push(v);
    if ( pos <= m ) {
        upd( v * 2, l, m, pos );
    }
    else {
        upd( v * 2 + 1, m + 1, r, pos );
    }
    t[v] = t[v * 2] + t[v * 2 + 1];
}

int get( int v, int l, int r, int tl, int tr ) {
    if ( tl > tr ) {
        return 0;
    }
    if ( l == tl && tr == r ) {
        return t[v];
    }
    push(v);
    int m = (l + r) / 2;
    int sum = get( v * 2, l, m, tl, min( m, tr ) );
    sum += get( v * 2 + 1, m + 1, r, max( tl, m + 1 ), tr );
    return sum;
}

int32_t main() {
    speed;
    int n;
    cin >> n;
    for ( int i = 1; i <= n; i++ ) {
        cin >> a[i];
    }
    int ans = 0;
    for ( int i = 1; i <= n; i++ ) {
        int l = i, r = i;
        while ( a[r + 1] >= a[r] && get( 1, 1, N - 1, a[l] + 1, a[r + 1] - 1 ) == 0 ) {
            r++;
        }
        while ( l <= r ) {
            upd( 1, 1, N - 1, a[l++] );
        }
        i = r;
        ans++;
    }
    cout << ans;
}

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