Submission #1093677

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093677		luvna	Cloud Computing (CEOI18_clo)	C++14	100 / 100	380 ms	2140 KiB

clo

#include<bits/stdc++.h>

#define endl "\n"
#define int long long

using namespace std;

typedef long long ll;

template<class T> bool maximize(T& a, T b) {if(a < b) return a = b, true; return false;}

const int N = 2005;
const ll INF = 1e18;

struct computer{
    int cores, rate, price;

    bool operator < (const computer& a) const{
        return (rate != a.rate) ? (rate > a.rate) : (cores > a.cores);
    }
};

int n, m;
computer a[N<<1];
vector<ll> dp;

void solve(){
    cin >> n;

    int max_cores = 0;

    for(int i = 1; i <= n; i++){
        int cores, rate, price; cin >> cores >> rate >> price;
        a[i] = {cores, rate, -price};
        max_cores += cores;
    }

    cin >> m;

    for(int i = 1; i <= m; i++){
        int cores, rate, price; cin >> cores >> rate >> price;
        a[i+n] = {-cores, rate, price};
    }

    n += m;

    sort(a + 1, a + 1 + n);

    dp.resize(max_cores + 5, -INF);

    dp[0] = 0;

    for(int i = 1; i <= n; i++){
        int cores = a[i].cores, p = a[i].price;
        vector<ll> f = dp;
        if(cores > 0){
            //computer
            //knapsack : f[i] = dp[i-cores] + p
            for(int j = cores; j <= max_cores; j++){
                f[j] = max(f[j], dp[j-cores] + 1LL*p);
            }
        }
        else{
            //task
            //knapsack : f[i] = dp[i + cores] + p
            cores = -cores;
            for(int j = max_cores - cores; j >= 0; j--){
                f[j] = max(f[j], dp[j + cores] + 1LL*p);
            }
        }
        swap(dp, f);
    }

    ll ans = 0;

    for(int i = 0; i <= max_cores; i++) maximize(ans, dp[i]);

    cout << ans;
}

signed main(){
    ios_base::sync_with_stdio(NULL);
    cin.tie(0); cout.tie(0);

    #define task "task"

    if(fopen(task".INP", "r")){
        freopen(task".INP", "r", stdin);
        freopen(task".OUT", "w", stdout);
    }

    int t; t = 1; //cin >> t;
    while(t--) solve();
}

Compilation message (stderr)

clo.cpp: In function 'int main()':
clo.cpp:88:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   88 |         freopen(task".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
clo.cpp:89:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |         freopen(task".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