oj.uz

Submission #1021687

# Submission time Handle Problem Language Result Execution time Memory
1021687 2024-07-13T02:34:41 Z guagua0407 Hacker (BOI15_hac) C++17
100 / 100
 282 ms 22356 KB 
//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};

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

const int inf=2e9+5;

int main() {_
    int n;
    cin>>n;
    vector<int> pre(2*n+1);
    vector<int> a(n+1);
    for(int i=1;i<=n;i++){
        cin>>a[i];
        pre[i]=a[i]+pre[i-1];
    }
    for(int i=n+1;i<=2*n;i++){
        pre[i]=pre[i-1]+a[i-n];
    }
    multiset<int> S;
    vector<int> mn(n+1,inf);
    int k=(n+1)/2;
    for(int i=1;i<=2*n;i++){
        if(i+k-1<=2*n){
            //cout<<"i "<<pre[i+k-1]-pre[i-1]<<'\n';
            S.insert(pre[i+k-1]-pre[i-1]);
        }
        if(i-1>=k){
            //cout<<"e "<<pre[i-1]-pre[i-1-k]<<'\n';
            S.erase(S.find(pre[i-1]-pre[i-1-k]));
        }
        int node=(i>n?i-n:i);
        if(!S.empty()) mn[node]=min(mn[node],*S.begin());
    }
    cout<<*max_element(mn.begin()+1,mn.end())<<'\n';
    return 0;
}
//maybe its multiset not set
//yeeorz
//laborz

Compilation message

hac.cpp: In function 'void setIO(std::string)':
hac.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
hac.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 2 ms 344 KB Output is correct
23 Correct 2 ms 604 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 464 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 2 ms 600 KB Output is correct
4 Correct 27 ms 3824 KB Output is correct
5 Correct 84 ms 9052 KB Output is correct
6 Correct 116 ms 11092 KB Output is correct
7 Correct 126 ms 13392 KB Output is correct
8 Correct 263 ms 22096 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 2 ms 344 KB Output is correct
23 Correct 2 ms 604 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 464 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 2 ms 600 KB Output is correct
35 Correct 27 ms 3824 KB Output is correct
36 Correct 84 ms 9052 KB Output is correct
37 Correct 116 ms 11092 KB Output is correct
38 Correct 126 ms 13392 KB Output is correct
39 Correct 263 ms 22096 KB Output is correct
40 Correct 3 ms 856 KB Output is correct
41 Correct 6 ms 1228 KB Output is correct
42 Correct 10 ms 1688 KB Output is correct
43 Correct 86 ms 9044 KB Output is correct
44 Correct 234 ms 22192 KB Output is correct
45 Correct 34 ms 4700 KB Output is correct
46 Correct 125 ms 13396 KB Output is correct
47 Correct 282 ms 22100 KB Output is correct
48 Correct 182 ms 22356 KB Output is correct
49 Correct 170 ms 21588 KB Output is correct
50 Correct 164 ms 21424 KB Output is correct