Submission #632580

#	Time	Username	Problem	Language	Result	Execution time	Memory
632580		ghostwriter	Art Exhibition (JOI18_art)	C++14	100 / 100	276 ms	26096 KiB

art

#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include <debug.h>
#endif
#define st first
#define nd second
#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 all(x) (x).begin(), (x).end()
#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 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); }
/*
    Tran The Bao
    CTL - Da Lat
    Practising for VOI23 gold medal
*/
const ll oo = 1e18;
const int N = 5e5 + 1;
int n;
pll a[N];
ll v[N], d[N], f[N], rs = -oo;
void upd(int ps, ll v) { for (int i = ps; i <= n; i += (i & -i)) f[i] = max(f[i], v); }
ll get(int ps) { ll rs = -oo; for (int i = ps; i >= 1; i -= (i & -i)) rs = max(rs, f[i]); return rs; }
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);
    cin >> n;
    FOR(i, 1, n) {
    	cin >> a[i].st >> a[i].nd;
    	v[i] = a[i].st;
    }
    sort(a + 1, a + 1 + n);
    sort(v + 1, v + 1 + n);
    FOR(i, 1, n) d[i] = d[i - 1] + a[i].nd;
    FOR(i, 1, n) f[i] = -oo;
    FOR(i, 1, n) {
    	rs = max(rs, a[i].nd);
    	int pos = lb(v + 1, v + 1 + n, a[i].st) - v;
    	ll tmp = get(pos);
    	rs = max(rs, d[i] - a[i].st + tmp);
    	upd(pos, -d[i - 1] + a[i].st);
    }
    cout << rs;
    return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
art.cpp:48:5: note: in expansion of macro 'FOR'
   48 |     FOR(i, 1, n) {
      |     ^~~
art.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
art.cpp:54:5: note: in expansion of macro 'FOR'
   54 |     FOR(i, 1, n) d[i] = d[i - 1] + a[i].nd;
      |     ^~~
art.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
art.cpp:55:5: note: in expansion of macro 'FOR'
   55 |     FOR(i, 1, n) f[i] = -oo;
      |     ^~~
art.cpp:24:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   24 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
art.cpp:56:5: note: in expansion of macro 'FOR'
   56 |     FOR(i, 1, n) {
      |     ^~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50