Submission #466473

#	Time	Username	Problem	Language	Result	Execution time	Memory
466473		spike1236	Art Exhibition (JOI18_art)	C++14	0 / 100	1 ms	320 KiB

art

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define ll long long
#define ld long double
#define all(_v) _v.begin(), _v.end()
#define sz(_v) (int)_v.size()
#define pii pair <int, int>
#define pll pair <ll, ll>
#define veci vector <int>
#define vecll vector <ll>

const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, -1, 1};
const double PI = 3.1415926535897932384626433832795;
const double eps = 1e-9;
const int MOD1 = 1e9 + 7;
const int MOD2 = 998244353;

const int MAXN = 2e5 + 10;
int n;
ll a[MAXN], b[MAXN];
int ord[MAXN];
ll pref[MAXN];

bool cmp(int i, int j) {
    if(a[i] != a[j]) return (a[i] < a[j]);
    return (b[i] < b[j]);
}

void solve() {
    cin >> n;
    for(int i = 1; i <= n; ++i)
        cin >> a[i] >> b[i], ord[i] = i;
    sort(ord + 1, ord + n + 1, &cmp);
    for(int i = 1; i <= n; ++i)
        pref[i] = pref[i - 1] + b[ord[i]];
    ll ans = -1e18, res = -a[ord[1]];
    /**
    MAX(p[r] - p[l - 1] - a[r] + a[l])
    MAX(p[r] - a[r] - (p[l - 1] - a[l]))
    */
    for(int i = 1; i <= n; ++i) {
        ans = max(ans, pref[i] - a[ord[i]] - res);
        res = min(res, pref[i - 1] - a[ord[i]]);
    }
    cout << ans;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int CNT_TESTS = 1;
    ///cin >> CNT_TESTS;
    for(int NUMCASE = 1; NUMCASE <= CNT_TESTS; ++NUMCASE) {
        solve();
        if(NUMCASE != CNT_TESTS) cout << '\n';
    }
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50