Submission #648557

#	Time	Username	Problem	Language	Result	Execution time	Memory
648557		ghostwriter	Holiday (IOI14_holiday)	C++14	47 / 100	198 ms	3412 KiB

holiday

#include"holiday.h"
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include <debug.h>
#include "grader.cpp"
#else
#define debug(...)
#endif
#define ft front
#define bk back
#define st first
#define nd second
#define ins insert
#define ers erase
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define bg begin
#define ed end
#define all(x) (x).bg(), (x).ed()
#define sz(x) (int)(x).size()
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
template<typename T> T gcd(T a, T b) { return (b == 0? a : gcd(b, a % b)); }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
#define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
#define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
#define FRN(i, n) for (int (i) = 0; (i) < (n); ++(i))
#define FSN(i, n) for (int (i) = (n) - 1; (i) >= 0; --(i))
#define EACH(i, x) for (auto &(i) : (x))
#define WHILE while
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
----------------------------------------------------------------
    END OF TEMPLATE
----------------------------------------------------------------
    Tran The Bao - ghostwriter
    Training for VOI23 gold medal
----------------------------------------------------------------
    DIT ME CHUYEN BAO LOC
----------------------------------------------------------------
*/
namespace subtask13 {
    const int N = 3005;
    int pos[N];
    pi a[N];
    pll f[N];
    ll rs = 0;
    void upd(int pos, pi v) { ++pos; for (int i = pos; i < N; i += (i & -i)) { f[i].st += v.st; f[i].nd += v.nd; } }
    pll get(int pos) { ++pos; pll rs = {0, 0}; for (int i = pos; i > 0; i -= (i & -i)) { rs.st += f[i].st; rs.nd += f[i].nd; } return rs; }
    int getpos(int x) {
        int cur = 0, cnt = 0, ans = N;
        FOS(i, 11, 0) {
            if (cur + (1 << i) >= N) continue;
            if (cnt + f[cur + (1 << i)].st >= x) ans = min(ans, cur + (1 << i));
            else {
                cur |= 1 << i;
                cnt += f[cur].st;
            }
        }
        return ans - 1;
    }
    ll findMaxAttraction(int n, int start, int d, int attraction[]) {
        FRN(i, n) a[i] = {attraction[i], i};
        sort(a, a + n, greater<pi>());
        FRN(i, n) pos[a[i].nd] = i;
        FRN(i, n) {
            FOR(j, i, n - 1) {
                upd(pos[j], {1, attraction[j]});
                int mv;
                if (j < start || i > start) continue;
                if (i == start) mv = j - start;
                else if (j == start) mv = start - i;
                else mv = min(2 * (start - i) + j - start, 2 * (j - start) + start - i);
                if (mv > d) continue;
                int rm = min(d - mv, j - i + 1), pos = getpos(rm);
                rs = max(rs, get(pos).nd);
            }
            FOR(j, i, n - 1) upd(pos[j], {-1, -attraction[j]});
        }
        return rs;
    }
}
namespace subtask2 {
    const int N = 1e5 + 5;
    int pos[N];
    pi a[N];
    pll f[N];
    ll rs = 0;
    void upd(int pos, pi v) { ++pos; for (int i = pos; i < N; i += (i & -i)) { f[i].st += v.st; f[i].nd += v.nd; } }
    pll get(int pos) { ++pos; pll rs = {0, 0}; for (int i = pos; i > 0; i -= (i & -i)) { rs.st += f[i].st; rs.nd += f[i].nd; } return rs; }
    int getpos(int x) {
        int cur = 0, cnt = 0, ans = N;
        FOS(i, 16, 0) {
            if (cur + (1 << i) >= N) continue;
            if (cnt + f[cur + (1 << i)].st >= x) ans = min(ans, cur + (1 << i));
            else {
                cur |= 1 << i;
                cnt += f[cur].st;
            }
        }
        return ans - 1;
    }
    ll findMaxAttraction(int n, int start, int d, int attraction[]) {
        FRN(i, n) a[i] = {attraction[i], i};
        sort(a, a + n, greater<pi>());
        FRN(i, n) pos[a[i].nd] = i;
        FRN(i, n) {
            upd(pos[i], {1, attraction[i]});
            int mv = i - start;
            if (mv > d) break;
            int rm = d - mv, pos = getpos(rm);
            rs = max(rs, get(pos).nd);
        }
        return rs;
    }   
}
long long int findMaxAttraction(int n, int start, int d, int attraction[]) {
    if (n <= 3000) return subtask13::findMaxAttraction(n, start, d, attraction);
    if (start == 0) return subtask2::findMaxAttraction(n, start, d, attraction);
    return 0;
}
/*
5 2 7
10 2 20 30 1
----------------------------------------------------------------
From Benq:
    stuff you should look for
        * int overflow, array bounds
        * special cases (n=1?)
        * do smth instead of nothing and stay organized
        * WRITE STUFF DOWN
        * DON'T GET STUCK ON ONE APPROACH
----------------------------------------------------------------
*/

Compilation message (stderr)

holiday.cpp: In function 'int subtask13::getpos(int)':
holiday.cpp:35:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   35 | #define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
      |                               ^
holiday.cpp:63:9: note: in expansion of macro 'FOS'
   63 |         FOS(i, 11, 0) {
      |         ^~~
holiday.cpp: In function 'll subtask13::findMaxAttraction(int, int, int, int*)':
holiday.cpp:36:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   36 | #define FRN(i, n) for (int (i) = 0; (i) < (n); ++(i))
      |                            ^
holiday.cpp:74:9: note: in expansion of macro 'FRN'
   74 |         FRN(i, n) a[i] = {attraction[i], i};
      |         ^~~
holiday.cpp:36:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   36 | #define FRN(i, n) for (int (i) = 0; (i) < (n); ++(i))
      |                            ^
holiday.cpp:76:9: note: in expansion of macro 'FRN'
   76 |         FRN(i, n) pos[a[i].nd] = i;
      |         ^~~
holiday.cpp:36:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   36 | #define FRN(i, n) for (int (i) = 0; (i) < (n); ++(i))
      |                            ^
holiday.cpp:77:9: note: in expansion of macro 'FRN'
   77 |         FRN(i, n) {
      |         ^~~
holiday.cpp:34:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   34 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
holiday.cpp:78:13: note: in expansion of macro 'FOR'
   78 |             FOR(j, i, n - 1) {
      |             ^~~
holiday.cpp:34:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   34 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
holiday.cpp:89:13: note: in expansion of macro 'FOR'
   89 |             FOR(j, i, n - 1) upd(pos[j], {-1, -attraction[j]});
      |             ^~~
holiday.cpp: In function 'int subtask2::getpos(int)':
holiday.cpp:35:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   35 | #define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
      |                               ^
holiday.cpp:104:9: note: in expansion of macro 'FOS'
  104 |         FOS(i, 16, 0) {
      |         ^~~
holiday.cpp: In function 'll subtask2::findMaxAttraction(int, int, int, int*)':
holiday.cpp:36:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   36 | #define FRN(i, n) for (int (i) = 0; (i) < (n); ++(i))
      |                            ^
holiday.cpp:115:9: note: in expansion of macro 'FRN'
  115 |         FRN(i, n) a[i] = {attraction[i], i};
      |         ^~~
holiday.cpp:36:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   36 | #define FRN(i, n) for (int (i) = 0; (i) < (n); ++(i))
      |                            ^
holiday.cpp:117:9: note: in expansion of macro 'FRN'
  117 |         FRN(i, n) pos[a[i].nd] = i;
      |         ^~~
holiday.cpp:36:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   36 | #define FRN(i, n) for (int (i) = 0; (i) < (n); ++(i))
      |                            ^
holiday.cpp:118:9: note: in expansion of macro 'FRN'
  118 |         FRN(i, n) {
      |         ^~~

• Subtask 1: 7 / 7
• Subtask 2: 23 / 23
• Subtask 3: 17 / 17
• Subtask 4: 0 / 53