oj.uz

Submission #470009

# Submission time Handle Problem Language Result Execution time Memory
470009 2021-09-02T15:04:10 Z Killer2501 Hacker (BOI15_hac) C++14
40 / 100
 95 ms 87092 KB 
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define task "tests"
#define pll pair<ll, ll>
#define pi pair<ll, pll>
#define fi first
#define se second

using namespace std;
const ll mod = 1e9+7;
const ll N = 2e5+5;
const int base = 313;
ll n, m, t, k, T, ans, q, tong, c[N], a[N], b[N], h[N], P[N][20];
vector<ll> adj[N], kq;
ll pw(ll k, ll n)
{
    ll total = 1;
    for(; n; n >>= 1)
    {
        if(n & 1)total = total * k % mod;
        k = k * k % mod;
    }
    return total;
}
ll sum(ll l, ll r)
{
    if(l <= r)return b[r] - b[l-1];
    return b[r] + b[n] - b[l-1];
}
ll mx(ll l, ll r)
{
    ll log = log2(r-l+1);
    return max(P[l][log], P[r-(1<<log)+1][log]);
}
ll get(ll l, ll r)
{
    if(l <= r)return mx(l, r);
    return max(mx(1, r), mx(l, n));
}
void sol()
{
    cin >> n;
    for(int i = 1; i <= n; i ++)
    {
        cin >> a[i];
        b[i] = b[i-1] + a[i];
    }
    for(int i = 1; i <= n; i ++)
    {
        int j = i + n/2 - 1;
        if(j > n)j -= n;
        P[i][0] = sum(i, j);
    }
    for(int j = 1; j < 19; j ++)
    {
        for(int i = 1; i+(1<<j)-1 <= n; i ++)P[i][j] = max(P[i][j-1], P[i+(1<<(j-1))][j-1]);
    }
    for(int i = 1; i <= n; i ++)
    {
        int l = i + 1, r = i - n / 2;
        if(l > n)l -= n;
        if(r <= 0)r += n;
        ans = max(ans, b[n]- get(l, r));
    }
    cout << ans;
}
int main()
{
    if(fopen(task".in", "r"))
    {
       freopen(task".in", "r", stdin);
       freopen(task".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int ntest = 1;
    //cin >> ntest;
    while(ntest -- > 0)
    sol();
}

Compilation message

hac.cpp: In function 'int main()':
hac.cpp:72:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |        freopen(task".in", "r", stdin);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
hac.cpp:73:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   73 |        freopen(task".out", "w", stdout);
      |        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 5020 KB Output is correct
7 Correct 4 ms 5016 KB Output is correct
8 Correct 3 ms 5068 KB Output is correct
9 Correct 3 ms 5020 KB Output is correct
10 Correct 3 ms 5016 KB Output is correct
11 Correct 4 ms 5068 KB Output is correct
12 Correct 3 ms 5068 KB Output is correct
13 Correct 4 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 5024 KB Output is correct
17 Correct 3 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 5020 KB Output is correct
7 Correct 4 ms 5016 KB Output is correct
8 Correct 3 ms 5068 KB Output is correct
9 Correct 3 ms 5020 KB Output is correct
10 Correct 3 ms 5016 KB Output is correct
11 Correct 4 ms 5068 KB Output is correct
12 Correct 3 ms 5068 KB Output is correct
13 Correct 4 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 5024 KB Output is correct
17 Correct 3 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct
19 Correct 3 ms 5068 KB Output is correct
20 Correct 3 ms 5148 KB Output is correct
21 Correct 3 ms 5148 KB Output is correct
22 Correct 4 ms 5580 KB Output is correct
23 Correct 5 ms 5836 KB Output is correct
24 Correct 5 ms 5452 KB Output is correct
25 Correct 5 ms 5836 KB Output is correct
26 Correct 5 ms 5836 KB Output is correct
27 Correct 4 ms 5024 KB Output is correct
28 Correct 3 ms 4940 KB Output is correct
29 Correct 3 ms 4940 KB Output is correct
30 Correct 5 ms 5796 KB Output is correct
31 Correct 5 ms 5804 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5016 KB Output is correct
2 Correct 4 ms 5068 KB Output is correct
3 Correct 4 ms 5836 KB Output is correct
4 Correct 36 ms 19120 KB Output is correct
5 Correct 95 ms 40200 KB Output is correct
6 Runtime error 90 ms 87092 KB Execution killed with signal 11
7 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 5020 KB Output is correct
7 Correct 4 ms 5016 KB Output is correct
8 Correct 3 ms 5068 KB Output is correct
9 Correct 3 ms 5020 KB Output is correct
10 Correct 3 ms 5016 KB Output is correct
11 Correct 4 ms 5068 KB Output is correct
12 Correct 3 ms 5068 KB Output is correct
13 Correct 4 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 5024 KB Output is correct
17 Correct 3 ms 5068 KB Output is correct
18 Correct 3 ms 5068 KB Output is correct
19 Correct 3 ms 5068 KB Output is correct
20 Correct 3 ms 5148 KB Output is correct
21 Correct 3 ms 5148 KB Output is correct
22 Correct 4 ms 5580 KB Output is correct
23 Correct 5 ms 5836 KB Output is correct
24 Correct 5 ms 5452 KB Output is correct
25 Correct 5 ms 5836 KB Output is correct
26 Correct 5 ms 5836 KB Output is correct
27 Correct 4 ms 5024 KB Output is correct
28 Correct 3 ms 4940 KB Output is correct
29 Correct 3 ms 4940 KB Output is correct
30 Correct 5 ms 5796 KB Output is correct
31 Correct 5 ms 5804 KB Output is correct
32 Correct 4 ms 5016 KB Output is correct
33 Correct 4 ms 5068 KB Output is correct
34 Correct 4 ms 5836 KB Output is correct
35 Correct 36 ms 19120 KB Output is correct
36 Correct 95 ms 40200 KB Output is correct
37 Runtime error 90 ms 87092 KB Execution killed with signal 11
38 Halted 0 ms 0 KB -