Submission #1319769

#	Time	Username	Problem	Language	Result	Execution time	Memory
1319769		vaishakhv	Feast (NOI19_feast)	C++20	12 / 100	25 ms	2616 KiB

feast

// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define eb emplace_back // faster than push_back xD

// pbds UwU
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define oset tree<ll, null_type,less<ll>, rb_tree_tag,tree_order_statistics_node_update> // use pair for ms

// my io library :D
#define m1(x) template<class T, class... U> void x(T&& a, U&&... b)
#define m2(x) (ll[]){(x forward<U>(b),0)...}

m1(pr){cout << forward<T>(a);  m2(cout << " " <<); cout << "\n";}
m1(re){cin >> forward<T>(a); m2(cin >>);}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    ll n, k; re(n, k);
    vector<ll> a(n);
    for (ll i{}; i < n; i++) re(a[i]);

    ll neg = -1;
    for (ll i{}; i < (ll)n; i++) {
        if (a[i] < 0) { neg = i; break; }
    }

    ll tot = accumulate(a.begin(), a.end(), 0LL);

    if (neg == -1) {
        pr(tot);
    } else {
        ll l = accumulate(a.begin(), a.begin() + neg, 0LL);
        ll r = accumulate(a.begin() + neg + 1, a.end(), 0LL);
        if (k != 1) pr(l + r);
        else pr(max(max(l, r), tot));
    }
}

• Subtask 1: 4 / 4
• Subtask 2: 8 / 8
• Subtask 3: 0 / 18
• Subtask 4: 0 / 10
• Subtask 5: 0 / 11
• Subtask 6: 0 / 20
• Subtask 7: 0 / 29