Submission #959320

#	Time	Username	Problem	Language	Result	Execution time	Memory
959320		vjudge1	Art Exhibition (JOI18_art)	C++17	100 / 100	155 ms	21192 KiB

art

#include <bits/stdc++.h>
#define endl '\n'
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define fo(i,n) for(auto i =0 ; i < n;i++)
#define fore(i,l,r) for(auto i = l; i < r;i++)
#define forex(i,r,l) for(auto i = r; i >= l; i--)
#define ffo(i,n) forex(i,n-1,0)
#define all(x) x.begin(),x.end()
#define lsb(x) x&(-x)
#define sz(x) (int)x.size()
#define gcd(a,b) __gcd(a,b)
#define vii vector<ii>
using namespace std;
using ii = pair<int,int>; using ll = long long; using ull = unsigned long long;
using vi = vector<ll>;
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
const int N = 5e5 + 7;
struct cosa{
    ll a,b;
    bool operator <(const cosa &e){
        return a < e.a;
    }
};
void test_case(){
    int n; cin >> n;
    vector<cosa> arr;
    fo(i,n){
        ll a,b; cin >> a >> b;
        arr.pb({a,b});
    }sort(all(arr));
    ll ans = -1e18, best = -1e18;
    fo(i,n){
        // fijamos arr[i].a como el max
        // la formula nos queda S_B's - (max - min) = S_B's + min
        // encontrar lo que maximice S_B's + min
        best = max(best, arr[i].a);
        best += arr[i].b;
        ans = max(ans, best - arr[i].a);
    }cout << ans << endl;
}
int main(){cin.tie(0)->sync_with_stdio(0);
    int t=1;
    // cin >> t;
    while(t--)test_case();
}

Compilation message (stderr)

art.cpp:20: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   20 | #pragma GCC optimization ("O3")
      | 
art.cpp:21: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   21 | #pragma GCC optimization ("unroll-loops")
      |

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