Submission #538633

#	Time	Username	Problem	Language	Result	Execution time	Memory
538633		ddy888	Cloud Computing (CEOI18_clo)	C++17	0 / 100	34 ms	508 KiB

clo

#undef _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define int long long 
#define pb push_back
#define fi first
#define si second
#define ar array
typedef pair<int,int> pi;
typedef tuple<int,int,int> ti;  
void debug_out() {cerr<<endl;}
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {cerr<<" "<<to_string(H);debug_out(T...);}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:",debug_out(__VA_ARGS__)

struct event {
    int c, f, v, flag;
} items[5010];

const int INF = 1e18;
int N, M, st, ans;
int dp[10010];

signed main() {
    cin >> N;
    for (int i = 1; i <= N; ++i) {
        cin >> items[i].c >> items[i].f >> items[i].v;
        items[i].flag = 1;
    }
    cin >> M;
    for (int i = N + 1; i <= N + M; ++i) {
        cin >> items[i].c >> items[i].f >> items[i].v;
        items[i].flag = 0;
    }
    sort(items + 1, items + 1 + N + M, [](event a, event b) {
        if (a.f == b.f) return a.flag > b.flag;
        return a.f > b.f;
    });
    for (int j = 0; j <= 10010; ++j) dp[j] = -INF;
    for (int i = 1; i <= N + M; ++i) {
        if (items[i].flag) {
            st = i;
            break;
        }   
    }
    for (int i = st; i <= N + M; ++i) {
        vector<int> new_dp(10010, -INF);
        if (items[i].flag) new_dp[items[i].c] = max(dp[0], -items[i].v); 
        for (int j = 0; j <= 10000; ++j) {
            new_dp[j] = max(dp[j], new_dp[j]);
            if (items[i].flag) {
                if (j >= items[i].c) new_dp[j] = max(new_dp[j], dp[j - items[i].c] - items[i].v);
            } else {
                new_dp[j] = max(new_dp[j], dp[j + items[i].c] + items[i].v);
                ans = max(ans, new_dp[j]);
            }
        }
        for (int j = 0; j <= 10000; ++j) dp[j] = new_dp[j];
    }
    cout << ans;
    return 0;
}

Compilation message (stderr)

clo.cpp: In function 'int main()':
clo.cpp:40:44: warning: iteration 10010 invokes undefined behavior [-Waggressive-loop-optimizations]
   40 |     for (int j = 0; j <= 10010; ++j) dp[j] = -INF;
      |                                      ~~~~~~^~~~~~
clo.cpp:40:23: note: within this loop
   40 |     for (int j = 0; j <= 10010; ++j) dp[j] = -INF;
      |                     ~~^~~~~~~~

• Subtask 1: 0 / 18
• Subtask 2: 0 / 18
• Subtask 3: 0 / 18
• Subtask 4: 0 / 18
• Subtask 5: 0 / 18
• Subtask 6: 0 / 10