Submission #1308835

#	Time	Username	Problem	Language	Result	Execution time	Memory
1308835		Tymond	Worst Reporter 3 (JOI18_worst_reporter3)	C++20	100 / 100	356 ms	11240 KiB

worst_reporter3

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define fi first
#define se second
#define vi vector<int>
#define vll vector<long long>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
mt19937_64 rng64(chrono::high_resolution_clock::now().time_since_epoch().count());
inline int rand(int l,int r){return uniform_int_distribution<int>(l, r)(rng);}
inline ll rand(ll l,ll r){return uniform_int_distribution<ll>(l, r)(rng64);}
#ifdef DEBUG
auto&operator<<(auto&o,pair<auto,auto>p){return o<<"("<<p.first<<", "<<p.second<<")";}
auto operator<<(auto&o,auto x)->decltype(x.end(),o){o<<"{";int i=0;for(auto e:x)o<<","+!i++<<e;return o<<"}";}
#define debug(X...)cerr<<"["#X"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(X)
#else
#define debug(...){}
#endif

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        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);
    }
};

struct pair_hash{
  size_t operator()(const pair<int,int>&x)const{
    return hash<long long>()(((long long)x.first)^(((long long)x.second)<<32));
  }
};

const ll INF = 1e9 + 7;
const int MAXN = 5e5 + 7;
ll D[MAXN];
ll X[MAXN];
int n, q;

ll getPos(ll x, ll t){
    if(X[x] == INF){
        return -x;
    }

    return (ll)-x + (ll)X[x] * (t / X[x]);
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);

    cin >> n >> q;
    for(int i = 1; i <= n; i++){
        cin >> D[i];
    }

    X[0] = 1;
    for(int i = 1; i <= n; i++){
        X[i] = min(INF, (ll)X[i - 1] * ((D[i] + X[i - 1] - 1) / X[i - 1]));
    }

    while(q--){
        ll t, L, R;
        cin >> t >> L >> R;
        // for(int i = 0; i <= n; i++){
        //     cout << i << ' ' << getPos(i, t) << '\n';
        // }

        int l = 0;
        int p = n;
        int mid;
        while(l < p){
            mid = (l + p) / 2;
           // cerr << l << ' ' << p << ' ' << mid << ' ' << getPos(mid, t) << ' ' << R << '\n';
            if(getPos(mid, t) <= R){
                p = mid;
            }else{
                l = mid + 1;
            }
        }
       // cerr << l << '\n';

        if(getPos(l, t) < L || getPos(l, t) > R){
            cout << "0\n";
            continue;
        }

        int x = l;
        l = 0;
        p = n;
        while(l < p){
            mid = (l + p + 1) / 2;
            if(getPos(mid, t) >= L){
                l = mid;
            }else{
                p = mid - 1;
            }
        }
       // cerr << l << '\n';

        cout << l - x + 1 << '\n';
    }

    return 0;
}

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