Submission #358557

#	Time	Username	Problem	Language	Result	Execution time	Memory
358557		Sparky_09	Cloud Computing (CEOI18_clo)	C++17	100 / 100	401 ms	1388 KiB

clo

#include <bits/stdc++.h>
using namespace std;
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<ll, ll> pii;
typedef vector<ll> vi;
typedef vector<pii> vpi;

void usaco(string s){
  freopen((s+".in").c_str(), "r", stdin);
  freopen((s+".out").c_str(), "w", stdout);
}

const int maxn = 2e3 + 5;
ll dp[maxn * 50];
 
struct object{
    int c , f , v;
    bool operator < (const object & other){
        if(f == other.f)return v < other.v;
        return f > other.f;
    }
}a[maxn * 2];
 
int n , m;
int main() {
	cin.tie(0)->sync_with_stdio(0);
	cin.exceptions(cin.failbit);
#ifdef LOCAL_DEFINE
	freopen("input.txt", "r", stdin);
#endif
    cin >> n;
    for(int i = 1 ; i <= n ; ++i){
        cin >> a[i].c >> a[i].f >> a[i].v;
        a[i].v = -a[i].v;
    }
    cin >> m;
    for(int i = 1 ; i <= m ; ++i){
        cin >> a[i + n].c >> a[i + n].f >> a[i + n].v;
    }
    sort(a + 1 , a + n + m + 1);
    fill_n(&dp[0],maxn*50,-1e18);
    dp[0] = 0;
    for(int i = 1 ; i <= n + m ; ++i){
        if(a[i].v < 0){
            for(int j = 100000 - a[i].c ; j >= 0 ; --j){
                dp[j + a[i].c] = max(dp[j + a[i].c] , dp[j] + a[i].v);
            }
        }else{
            for(int j = a[i].c ; j <= 100000 ; ++j){
                dp[j - a[i].c] = max(dp[j - a[i].c] , dp[j] + a[i].v);
            }
        }
    }
    cout << *max_element(dp,dp+maxn*50);
}

Compilation message (stderr)

clo.cpp: In function 'void usaco(std::string)':
clo.cpp:12:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   12 |   freopen((s+".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
clo.cpp:13:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   13 |   freopen((s+".out").c_str(), "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