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Submission #384659

# Submission time Handle Problem Language Result Execution time Memory
384659 2021-04-02T03:16:04 Z zoooma13 Hacker (BOI15_hac) C++14
20 / 100
 435 ms 22344 KB 
#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n ,sum = 0;
    scanf("%d",&n);
    vector <int> a(n);
    for(int&i : a)
        scanf("%d",&i) ,sum += i;
    a.insert(a.end() ,a.begin() ,a.end());
    vector <int> b(n);
    for(int i=0; i<n/2; i++)
        b[0] += a[i];
    for(int i=1; i<n; i++)
        b[i] = b[i-1] - a[i-1] + a[i+n/2-1];
    b.insert(b.end() ,b.begin() ,b.end());
    multiset <int> ms;
    for(int i=0; i<n/2; i++)
        ms.insert(b[i]);
    int ans = sum - *ms.rbegin();
    for(int i=0; i<n; i++){
        ms.erase(ms.find(b[i]));
        ms.insert(b[i+n/2]);
        ans = max(ans ,sum - *ms.rbegin());
    }
    printf("%d\n",ans);
}

Compilation message

hac.cpp: In function 'int main()':
hac.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    7 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
hac.cpp:10:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   10 |         scanf("%d",&i) ,sum += i;
      |         ~~~~~^~~~~~~~~

Subtask #1
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Incorrect 2 ms 364 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Incorrect 2 ms 364 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 376 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 3 ms 492 KB Output is correct
4 Correct 41 ms 3504 KB Output is correct
5 Correct 121 ms 8924 KB Output is correct
6 Correct 169 ms 11160 KB Output is correct
7 Correct 212 ms 13528 KB Output is correct
8 Correct 435 ms 22344 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Incorrect 2 ms 364 KB Output isn't correct
4 Halted 0 ms 0 KB -