oj.uz

Submission #174708

# Submission time Handle Problem Language Result Execution time Memory
174708 2020-01-06T20:34:14 Z GoldeN Bigger segments (IZhO19_segments) C++17
100 / 100
 101 ms 17016 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]];
        auto it=lower_bound(pref+i,pref+n+1,x);
        int id=it-pref;
        ind[id]=i;
    }
    cout << dp[n];
}

Compilation message

segments.cpp: In function 'int main()':
segments.cpp:55:13: warning: unused variable 'l' [-Wunused-variable]
         int l=i,r=n+1;
             ^
segments.cpp:55:17: warning: unused variable 'r' [-Wunused-variable]
         int l=i,r=n+1;
                 ^

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 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 376 KB Output is correct
5 Correct 2 ms 380 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 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 380 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 380 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 380 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 376 KB Output is correct
5 Correct 2 ms 380 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 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 380 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 380 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 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 2 ms 376 KB Output is correct
27 Correct 2 ms 380 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 504 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 380 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 376 KB Output is correct
5 Correct 2 ms 380 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 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 380 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 380 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 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 2 ms 376 KB Output is correct
27 Correct 2 ms 380 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 504 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 472 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 2 ms 504 KB Output is correct
38 Correct 2 ms 504 KB Output is correct
39 Correct 2 ms 476 KB Output is correct
40 Correct 3 ms 504 KB Output is correct
41 Correct 2 ms 508 KB Output is correct
42 Correct 2 ms 504 KB Output is correct
43 Correct 2 ms 504 KB Output is correct
44 Correct 2 ms 504 KB Output is correct
45 Correct 2 ms 508 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 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 376 KB Output is correct
5 Correct 2 ms 380 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 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 380 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 380 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 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 2 ms 376 KB Output is correct
27 Correct 2 ms 380 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 504 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 472 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 2 ms 504 KB Output is correct
38 Correct 2 ms 504 KB Output is correct
39 Correct 2 ms 476 KB Output is correct
40 Correct 3 ms 504 KB Output is correct
41 Correct 2 ms 508 KB Output is correct
42 Correct 2 ms 504 KB Output is correct
43 Correct 2 ms 504 KB Output is correct
44 Correct 2 ms 504 KB Output is correct
45 Correct 2 ms 508 KB Output is correct
46 Correct 16 ms 3912 KB Output is correct
47 Correct 19 ms 3980 KB Output is correct
48 Correct 20 ms 4316 KB Output is correct
49 Correct 20 ms 4472 KB Output is correct
50 Correct 20 ms 4456 KB Output is correct
51 Correct 22 ms 4476 KB Output is correct
52 Correct 12 ms 2424 KB Output is correct
53 Correct 8 ms 1528 KB Output is correct
54 Correct 14 ms 3704 KB Output is correct
55 Correct 21 ms 4344 KB Output is correct
56 Correct 15 ms 3960 KB Output is correct
57 Correct 16 ms 3960 KB Output is correct
58 Correct 16 ms 3960 KB Output is correct
59 Correct 17 ms 4088 KB Output is correct
60 Correct 16 ms 4088 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 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 376 KB Output is correct
5 Correct 2 ms 380 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 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 380 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 380 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 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 2 ms 376 KB Output is correct
27 Correct 2 ms 380 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 504 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 472 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 2 ms 504 KB Output is correct
38 Correct 2 ms 504 KB Output is correct
39 Correct 2 ms 476 KB Output is correct
40 Correct 3 ms 504 KB Output is correct
41 Correct 2 ms 508 KB Output is correct
42 Correct 2 ms 504 KB Output is correct
43 Correct 2 ms 504 KB Output is correct
44 Correct 2 ms 504 KB Output is correct
45 Correct 2 ms 508 KB Output is correct
46 Correct 16 ms 3912 KB Output is correct
47 Correct 19 ms 3980 KB Output is correct
48 Correct 20 ms 4316 KB Output is correct
49 Correct 20 ms 4472 KB Output is correct
50 Correct 20 ms 4456 KB Output is correct
51 Correct 22 ms 4476 KB Output is correct
52 Correct 12 ms 2424 KB Output is correct
53 Correct 8 ms 1528 KB Output is correct
54 Correct 14 ms 3704 KB Output is correct
55 Correct 21 ms 4344 KB Output is correct
56 Correct 15 ms 3960 KB Output is correct
57 Correct 16 ms 3960 KB Output is correct
58 Correct 16 ms 3960 KB Output is correct
59 Correct 17 ms 4088 KB Output is correct
60 Correct 16 ms 4088 KB Output is correct
61 Correct 78 ms 16888 KB Output is correct
62 Correct 81 ms 16964 KB Output is correct
63 Correct 87 ms 16888 KB Output is correct
64 Correct 93 ms 16888 KB Output is correct
65 Correct 92 ms 16888 KB Output is correct
66 Correct 101 ms 16888 KB Output is correct
67 Correct 81 ms 13784 KB Output is correct
68 Correct 41 ms 7544 KB Output is correct
69 Correct 67 ms 16888 KB Output is correct
70 Correct 97 ms 16888 KB Output is correct
71 Correct 64 ms 16944 KB Output is correct
72 Correct 77 ms 16888 KB Output is correct
73 Correct 77 ms 17016 KB Output is correct
74 Correct 78 ms 17016 KB Output is correct
75 Correct 79 ms 16920 KB Output is correct