Submission #1093338

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093338		InvMOD	Cloud Computing (CEOI18_clo)	C++14	100 / 100	593 ms	2392 KiB

clo

#include<bits/stdc++.h>

using namespace std;

using ll = long long;

template<typename T> bool ckmx(T& a, const T b){if(a < b) return a = b, true; return false;}
template<typename T> bool ckmn(T& a, const T b){if(a > b) return a = b, true; return false;}

const int N = 2e3+5;
const ll INF = 1e18;

struct Computer{
    int core, rate;
    ll value;

    // computer will < 0 and task will > 0
    // computer has no harm with our dynamic programing :D
    bool operator < (const Computer& q) const{
        if(rate != q.rate){
            return rate > q.rate;
        }
        else return value < q.value;
    }
};

int n, m;
ll dp[2][50 * N];
Computer value[2 * N];


void solve()
{
    cin >> n;
    int total_core = 0;
    for(int i = 1; i <= n; i++){
        cin >> value[i].core >> value[i].rate >> value[i].value;
        value[i].value = -value[i].value;
        total_core = total_core + value[i].core;
    }

    cin >> m;
    for(int i = n+1; i <= n+m; i++){
        cin >> value[i].core >> value[i].rate >> value[i].value;
        value[i].core = -value[i].core;
    }

    sort(value+1, value+1+n+m);
    for(int i = 0; i < 2; i++){
        fill(dp[i]+1, dp[i]+1+total_core, -INF);
    }

    for(int i = 1; i <= n+m; i++){
        int pos = (i&1), pre = ((i&1)^1);
        if(value[i].core > 0){
            // is computer
            //cout << value[i].core <<" " << value[i].value <<"\n";
            for(int j = value[i].core; j <= total_core; j++){
                ckmx(dp[pos][j], dp[pre][j - value[i].core] + value[i].value);
            }
        }
        else{
            // is task
            int cur_core = -value[i].core;
            //cout << cur_core << " " << value[i].value <<"\n";
            for(int j = total_core - cur_core; j >= 0; j--){
                ckmx(dp[pos][j], dp[pre][j + cur_core] + value[i].value);
            }
        }

        for(int j = 0; j <= total_core; j++){
            ckmx(dp[pos][j], dp[pre][j]);
        }
    }

    ll answer = 0;
    for(int i = 0; i < 2; i++){
        for(int j = 0; j <= total_core; j++){
            answer = max(answer, dp[i][j]);
        }
    }

    cout << answer <<"\n";
}

int32_t main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    #define name "InvMOD"
    if(fopen(name".INP", "r")){
        freopen(name".INP", "r", stdin);
        freopen(name".OUT", "w", stdout);
    }

    solve();
    return 0;
}

Compilation message (stderr)

clo.cpp: In function 'int32_t main()':
clo.cpp:92:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         freopen(name".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
clo.cpp:93:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |         freopen(name".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