oj.uz

Submission #226371

# Submission time Handle Problem Language Result Execution time Memory
226371 2020-04-23T14:44:51 Z MKopchev Hacker (BOI15_hac) C++14
100 / 100
 260 ms 8800 KB 
#include<bits/stdc++.h>
using namespace std;
const int nmax=5e5+42;
int n,inp[nmax];

long long pref[nmax];

int take;

long long ask(int l,int r)
{
    while(l>n)l=l-n;
    while(r>n)r=r-n;

    if(l<=r)return pref[r]-pref[l-1];
    return pref[r]+pref[n]-pref[l-1];
}
bool can(long long want)
{
    int now=0;
    for(int i=1;i<=2*n;i++)
    {

        if(ask(i,i+take-1)>=want)now++;
        else now=0;


        if(now>=take)
        {

            return 1;
        }
    }
    return 0;
}
int main()
{
    scanf("%i",&n);
    for(int i=1;i<=n;i++)scanf("%i",&inp[i]);

    take=(n+1)/2;

    for(int i=1;i<=n;i++)pref[i]=pref[i-1]+inp[i];

    long long ok=0,not_ok=1e18;

    while(not_ok-ok>1)
    {
        long long av=(ok+not_ok)/2;
        if(can(av))ok=av;
        else not_ok=av;
    }

    printf("%lld\n",ok);
    return 0;
}

Compilation message

hac.cpp: In function 'int main()':
hac.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i",&n);
     ~~~~~^~~~~~~~~
hac.cpp:39:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1;i<=n;i++)scanf("%i",&inp[i]);
                          ~~~~~^~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 308 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 6 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 308 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 6 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 7 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 6 ms 384 KB Output is correct
23 Correct 8 ms 384 KB Output is correct
24 Correct 8 ms 384 KB Output is correct
25 Correct 7 ms 384 KB Output is correct
26 Correct 7 ms 384 KB Output is correct
27 Correct 5 ms 436 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 7 ms 384 KB Output is correct
31 Correct 7 ms 384 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 7 ms 384 KB Output is correct
4 Correct 47 ms 1784 KB Output is correct
5 Correct 107 ms 3500 KB Output is correct
6 Correct 124 ms 4344 KB Output is correct
7 Correct 141 ms 5240 KB Output is correct
8 Correct 260 ms 8312 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 308 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 6 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 7 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 6 ms 384 KB Output is correct
23 Correct 8 ms 384 KB Output is correct
24 Correct 8 ms 384 KB Output is correct
25 Correct 7 ms 384 KB Output is correct
26 Correct 7 ms 384 KB Output is correct
27 Correct 5 ms 436 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 7 ms 384 KB Output is correct
31 Correct 7 ms 384 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 5 ms 384 KB Output is correct
34 Correct 7 ms 384 KB Output is correct
35 Correct 47 ms 1784 KB Output is correct
36 Correct 107 ms 3500 KB Output is correct
37 Correct 124 ms 4344 KB Output is correct
38 Correct 141 ms 5240 KB Output is correct
39 Correct 260 ms 8312 KB Output is correct
40 Correct 10 ms 512 KB Output is correct
41 Correct 13 ms 640 KB Output is correct
42 Correct 20 ms 896 KB Output is correct
43 Correct 96 ms 3584 KB Output is correct
44 Correct 248 ms 8440 KB Output is correct
45 Correct 49 ms 1912 KB Output is correct
46 Correct 154 ms 5212 KB Output is correct
47 Correct 249 ms 8312 KB Output is correct
48 Correct 234 ms 8800 KB Output is correct
49 Correct 222 ms 7800 KB Output is correct
50 Correct 229 ms 7800 KB Output is correct