Submission #698264

#	Time	Username	Problem	Language	Result	Execution time	Memory
698264		vjudge1	Cloud Computing (CEOI18_clo)	C++14	100 / 100	575 ms	2224 KiB

clo

#include <bits/stdc++.h>

using namespace std;

#define F first
#define S second
#define all(a) a.begin(), a.end()
#define pb push_back
#define int long long
typedef long long ll;
typedef pair<int, int> ii;

void print() {cerr << '\n';} template<typename T1, typename... T2>
void print(T1 a, T2... b) {cerr << a << ' ', print(b...);}

const int N = 2000 + 5;
vector<ll> last, curr;
int n, m;

struct events
{
    ll c, f, v, type;
};
vector<events> e;

bool cmp(const events &a, const events &b)
{
    return (a.f != b.f ? a.f > b.f : a.type < b.type);
}

void solve()
{
    int cores = 0;
    cin >> n;
    for(int i = 1; i <= n; i++)
    {
        int c, f, v;
        cin >> c >> f >> v;
        e.pb({c, f, v, -1});
        cores += c;
    }
    cin >> m;
    for(int i = 1; i <= m; i++)
    {
        int c, f, v;
        cin >> c >> f >> v;
        e.pb({c, f, v, 1});
    }
    sort(all(e), cmp);

    last.assign(cores + 5, -1e17);
    curr.assign(cores + 5, -1e17);
    last[0] = curr[0] = 0;

    for(const events &x : e)
    {
        curr = last;
        if(x.type == -1)
        {
            for(int i = x.c; i <= cores; i++)
                curr[i] = max(curr[i], last[i - x.c] - x.v);
        }
        else
        {
            for(int i = 0; i <= cores - x.c; i++)
                curr[i] = max(curr[i], last[i + x.c] + x.v);
        }
        last.swap(curr);
    }
    cout << *max_element(all(last));
}

signed main()
{
    if(fopen("test.inp", "r"))
    {
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    cin.tie(0) -> sync_with_stdio(0);
    int t = 1;
//    cin >> t;
    while(t--) solve();
    return 0;
}

Compilation message (stderr)

clo.cpp: In function 'int main()':
clo.cpp:77:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |         freopen("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
clo.cpp:78:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |         freopen("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 18 / 18
• Subtask 2: 18 / 18
• Subtask 3: 18 / 18
• Subtask 4: 18 / 18
• Subtask 5: 18 / 18
• Subtask 6: 10 / 10