Submission #48953

#	Time	Username	Problem	Language	Result	Execution time	Memory
48953		faishol27	Art Exhibition (JOI18_art)	C++14	100 / 100	888 ms	9148 KiB

art

#include  <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
#define PUB push_back
 
struct art{
    ll sz, val;
};
 
int N;
ll ans = 0, cnt = 0, pref[500005];
vector<art> data;

bool comp(art a, art b){
    if(a.sz == b.sz) return a.val < b.val;
    return a.sz < b.sz;
}

ll optimized(){
    cnt += data[1].val;
    ans = max(cnt, ans);

    for(int i=2;i<=N;i++){
        cnt += data[i].val-(data[i].sz-data[i-1].sz);
        if(cnt <= 0 || cnt < data[i].val){
            cnt = data[i].val;
        }
        ans = max(ans, cnt);
    }
} 

ll bf(){
    cout << "== BF ==" << endl;
    for(int i=1;i<=N;i++) pref[i] = pref[i-1]+data[i].val;
    
    for(int i=1;i<=N;i++) for(int j=i;j<=N;j++){
        ll tmp = (pref[j]-pref[i-1])-(data[j].sz-data[i].sz);
        
        if(ans < tmp){
            cout << i << " " << j << " " << tmp << endl;
            ans = tmp;
        }
    }
}

int main(){
    cin >> N;
    data.PUB({0,0});
    for(int i=1;i<=N;i++){
        ll a, b;
        cin >> a >> b;
        data.PUB({a, b});
    }
 
    sort(data.begin(), data.end(), comp);
    
    optimized();
    cout << ans << endl;
    
    //bf();
    //cout << ans << endl;

}

Compilation message (stderr)

art.cpp: In function 'll optimized()':
art.cpp:32:1: warning: no return statement in function returning non-void [-Wreturn-type]
 } 
 ^
art.cpp: In function 'll bf()':
art.cpp:46:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50