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Submission #174705

# Submission time Handle Problem Language Result Execution time Memory
174705 2020-01-06T20:30:56 Z GoldeN Bigger segments (IZhO19_segments) C++17
100 / 100
 114 ms 21120 KB 
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;

#define f first
#define s second
#define pb push_back
#define all(a) a.begin(),a.end()

typedef long long ll;
typedef long double ld;
typedef pair <int,int> pii;
typedef pair <ll,ll> pll;
typedef vector <ll> vl;
typedef vector <int> vi;
typedef vector <bool> vb;
typedef vector <vector <int> > vvi;
typedef vector <vector <ll> > vvl;
typedef vector <pair<int,int> > vii;
typedef vector <pair<ll,ll> > vll;

string itos(int n) {stringstream ss;ss<<n;string s=ss.str();return s;}

ll ppow(ll x,ll y,ll mod) {
    ll res=1;
    while(y) {
        if(y&1) res=res*x%mod;
        y>>=1;
        x=x*x%mod;
    }
    return res;
}

const int N=5e5+5;
const ll inf=1e18;

ll a[N],pref[N],dp[N],ind[N];



int main() {
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int n;
    cin >> n;
    for (int i=1;i<=n;++i) {
        cin >> a[i];
    }
    pref[1]=a[1];
    for (int i=2;i<=n;++i) {
        pref[i]=pref[i-1]+a[i];
    }
    for (int i=1;i<=n;++i) {
        ind[i]=max(ind[i],ind[i-1]);
        dp[i]=dp[ind[i]]+1;
        int l=i,r=n+1;
        ll x=2*pref[i]-pref[ind[i]];
        while (l+1 < r) {
            int m=(l+r)/2;
            if (pref[m] >= x) {
                r=m;
            }
            else {
                l=m;
            }
        }
        ind[r]=i;
    }
    cout << dp[n];
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 416 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 388 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 416 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 388 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 4 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 0 ms 392 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 1 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 3 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 504 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 416 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 388 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 4 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 0 ms 392 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 1 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 3 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 504 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 504 KB Output is correct
32 Correct 3 ms 504 KB Output is correct
33 Correct 3 ms 632 KB Output is correct
34 Correct 3 ms 504 KB Output is correct
35 Correct 3 ms 504 KB Output is correct
36 Correct 3 ms 504 KB Output is correct
37 Correct 3 ms 504 KB Output is correct
38 Correct 2 ms 504 KB Output is correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 3 ms 504 KB Output is correct
41 Correct 3 ms 504 KB Output is correct
42 Correct 3 ms 504 KB Output is correct
43 Correct 3 ms 504 KB Output is correct
44 Correct 3 ms 504 KB Output is correct
45 Correct 3 ms 504 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 416 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 388 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 4 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 0 ms 392 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 1 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 3 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 504 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 504 KB Output is correct
32 Correct 3 ms 504 KB Output is correct
33 Correct 3 ms 632 KB Output is correct
34 Correct 3 ms 504 KB Output is correct
35 Correct 3 ms 504 KB Output is correct
36 Correct 3 ms 504 KB Output is correct
37 Correct 3 ms 504 KB Output is correct
38 Correct 2 ms 504 KB Output is correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 3 ms 504 KB Output is correct
41 Correct 3 ms 504 KB Output is correct
42 Correct 3 ms 504 KB Output is correct
43 Correct 3 ms 504 KB Output is correct
44 Correct 3 ms 504 KB Output is correct
45 Correct 3 ms 504 KB Output is correct
46 Correct 19 ms 3832 KB Output is correct
47 Correct 21 ms 3932 KB Output is correct
48 Correct 23 ms 4344 KB Output is correct
49 Correct 23 ms 4472 KB Output is correct
50 Correct 24 ms 4520 KB Output is correct
51 Correct 25 ms 4472 KB Output is correct
52 Correct 13 ms 2424 KB Output is correct
53 Correct 9 ms 1528 KB Output is correct
54 Correct 17 ms 3704 KB Output is correct
55 Correct 23 ms 4472 KB Output is correct
56 Correct 17 ms 3960 KB Output is correct
57 Correct 18 ms 3960 KB Output is correct
58 Correct 18 ms 3960 KB Output is correct
59 Correct 18 ms 4088 KB Output is correct
60 Correct 18 ms 4088 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 416 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 388 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 4 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 0 ms 392 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 1 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 3 ms 376 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 504 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 504 KB Output is correct
32 Correct 3 ms 504 KB Output is correct
33 Correct 3 ms 632 KB Output is correct
34 Correct 3 ms 504 KB Output is correct
35 Correct 3 ms 504 KB Output is correct
36 Correct 3 ms 504 KB Output is correct
37 Correct 3 ms 504 KB Output is correct
38 Correct 2 ms 504 KB Output is correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 3 ms 504 KB Output is correct
41 Correct 3 ms 504 KB Output is correct
42 Correct 3 ms 504 KB Output is correct
43 Correct 3 ms 504 KB Output is correct
44 Correct 3 ms 504 KB Output is correct
45 Correct 3 ms 504 KB Output is correct
46 Correct 19 ms 3832 KB Output is correct
47 Correct 21 ms 3932 KB Output is correct
48 Correct 23 ms 4344 KB Output is correct
49 Correct 23 ms 4472 KB Output is correct
50 Correct 24 ms 4520 KB Output is correct
51 Correct 25 ms 4472 KB Output is correct
52 Correct 13 ms 2424 KB Output is correct
53 Correct 9 ms 1528 KB Output is correct
54 Correct 17 ms 3704 KB Output is correct
55 Correct 23 ms 4472 KB Output is correct
56 Correct 17 ms 3960 KB Output is correct
57 Correct 18 ms 3960 KB Output is correct
58 Correct 18 ms 3960 KB Output is correct
59 Correct 18 ms 4088 KB Output is correct
60 Correct 18 ms 4088 KB Output is correct
61 Correct 89 ms 17988 KB Output is correct
62 Correct 91 ms 17868 KB Output is correct
63 Correct 100 ms 18392 KB Output is correct
64 Correct 104 ms 20472 KB Output is correct
65 Correct 104 ms 21120 KB Output is correct
66 Correct 114 ms 20856 KB Output is correct
67 Correct 91 ms 16716 KB Output is correct
68 Correct 46 ms 8568 KB Output is correct
69 Correct 78 ms 17016 KB Output is correct
70 Correct 106 ms 20856 KB Output is correct
71 Correct 73 ms 17912 KB Output is correct
72 Correct 87 ms 18524 KB Output is correct
73 Correct 89 ms 18936 KB Output is correct
74 Correct 87 ms 19320 KB Output is correct
75 Correct 87 ms 19320 KB Output is correct