Submission #1046315

#	Time	Username	Problem	Language	Result	Execution time	Memory
1046315		GrindMachine	Worst Reporter 3 (JOI18_worst_reporter3)	C++17	100 / 100	820 ms	117384 KiB

worst_reporter3

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

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

/*

refs:
read some solutions a long time ago, dont really remember the key ideas from there

*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

template<typename T>
struct sparse_table {
    /*============================*/

    T merge(T a, T b) {
        return max(a,b);
    }

    /*============================*/

    vector<vector<T>> table;
    vector<int> bin_log;
    int LOG = 0;

    sparse_table() {

    }

    sparse_table(vector<T> &a, int n) {
        while ((1 << LOG) <= n) LOG++;

        table = vector<vector<T>>(n, vector<T>(LOG));
        bin_log = vector<int>(n + 1);

        rep(i, n) table[i][0] = a[i];

        rep1(j, LOG - 1) {
            rep(i, n) {
                int jump = 1 << (j - 1);
                if (i + jump >= n) {
                    break;
                }

                table[i][j] = merge(table[i][j - 1], table[i + jump][j - 1]);
            }
        }

        bin_log[1] = 0;
        for (int i = 2; i <= n; ++i) {
            bin_log[i] = bin_log[i / 2] + 1;
        }
    }

    T query(int l, int r) {
        int len = r - l + 1;
        int k = bin_log[len];

        T val1 = table[l][k];
        T val2 = table[r - (1 << k) + 1][k];

        return merge(val1, val2);
    }
};

void solve(int test_case)
{
    ll n,q; cin >> n >> q;
    vector<ll> a(n+5);
    rep1(i,n) cin >> a[i];

    sparse_table<ll> st(a,n+1);

    while(q--){
        ll t,l,r; cin >> t >> l >> r;
        ll ans = (l <= t and t <= r);
        ll mul = 1;
        ll pos = 0;

        while(pos <= n){
            ll lo = pos+1, hi = n;
            ll first = n+1;

            while(lo <= hi){
                ll mid = (lo+hi) >> 1;
                if(st.query(pos+1,mid) > mul){
                    first = mid;
                    hi = mid-1;
                }
                else{
                    lo = mid+1;
                }
            }

            ll val = (t/mul)*mul;
            ll rx = val-(pos+1);
            ll lx = val-(first-1);
            amax(lx,l);
            amin(rx,r);
            ans += max(rx-lx+1,0ll);

            if(first == n+1) break;
            
            ll k = ceil2(a[first],mul);
            mul *= k;
            ll p = (t/mul)*mul-first;
            ans += (l <= p and p <= r);
            
            pos = first;
        }

        cout << ans << endl;
    }
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 81 / 81