답안 #479435

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
479435	2021-10-11T20:19:40 Z	Lobo	Hacker (BOI15_hac)	C++17	40 / 100	80 ms	2124 KB

hac

#include <bits/stdc++.h>
 
using namespace std;

const long long INFll = (long long) 1e18 + 10;
const int INFii = (int) 1e9 + 10;
typedef long long ll;
typedef int ii;
typedef long double dbl;
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

#define maxn 1050000

ii n, v[maxn], r[maxn], ps[maxn]; 

int main() {
    ios::sync_with_stdio(false); cin.tie(0);

    //freopen("in.in", "r", stdin);
    //freopen("out.out", "w", stdout);

    cin >> n;

    for(ii i = 1; i <= n; i++) {
        cin >> v[i];
        v[i+n] = v[i];
    }

    for(ii i = 1; i <= 2*n; i++) {
        ps[i] = ps[i-1] + v[i];
        r[i] = INFii;
    }

    ii ans = 0;
    ii sz = (n+1)/2;
    //cout << sz << endl;

    if(n > 6e3) {
        ii i = 1;
        for(ii j = 0; j < sz; j++) {
            if(i+j <= 2*n && i-sz+j >= 0) {
                //cout << " " << j << "  " << i-sz+j+1 << " " << i+j << " " << ps[i+j] - ps[i-sz+j] << endl;
                r[i] = min(r[i],ps[i+j] - ps[i-sz+j]);
            }
        }
        i = n+1;
        for(ii j = 0; j < sz; j++) {
            if(i+j <= 2*n && i-sz+j >= 0) {
                //cout << " " << j << "  " << i-sz+j+1 << " " << i+j << " " << ps[i+j] - ps[i-sz+j] << endl;
                r[i] = min(r[i],ps[i+j] - ps[i-sz+j]);
            }
        }

        cout << max(r[1],r[n+1]) << endl;
        return 0;
    }

    for(ii i = 1; i <= 2*n; i++) {
        //cout << i << endl;
        for(ii j = 0; j < sz; j++) {
            if(i+j <= 2*n && i-sz+j >= 0) {
                //cout << " " << j << "  " << i-sz+j+1 << " " << i+j << " " << ps[i+j] - ps[i-sz+j] << endl;
                r[i] = min(r[i],ps[i+j] - ps[i-sz+j]);
            }
        }
    }

    for(ii i = 1; i <= n; i++) {
        ans = max(ans, min(r[i],r[i+n]));
        //cout << i << " " << min(r[i],r[i+n]) << endl;
    }

    cout << ans << endl;



}

Subtask #1

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	332 KB	Output is correct
2	Correct	0 ms	332 KB	Output is correct
3	Correct	0 ms	332 KB	Output is correct
4	Correct	0 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	332 KB	Output is correct
9	Correct	1 ms	332 KB	Output is correct
10	Correct	1 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	204 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct

Subtask #2

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	332 KB	Output is correct
2	Correct	0 ms	332 KB	Output is correct
3	Correct	0 ms	332 KB	Output is correct
4	Correct	0 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	332 KB	Output is correct
9	Correct	1 ms	332 KB	Output is correct
10	Correct	1 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	204 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	344 KB	Output is correct
20	Correct	4 ms	332 KB	Output is correct
21	Correct	2 ms	332 KB	Output is correct
22	Correct	30 ms	332 KB	Output is correct
23	Correct	77 ms	332 KB	Output is correct
24	Correct	29 ms	332 KB	Output is correct
25	Correct	78 ms	344 KB	Output is correct
26	Correct	80 ms	428 KB	Output is correct
27	Correct	0 ms	332 KB	Output is correct
28	Correct	0 ms	204 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	78 ms	432 KB	Output is correct
31	Correct	75 ms	428 KB	Output is correct

Subtask #3

0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	77 ms	332 KB	Output is correct
4	Incorrect	7 ms	2124 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #4

0 / 40.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	332 KB	Output is correct
2	Correct	0 ms	332 KB	Output is correct
3	Correct	0 ms	332 KB	Output is correct
4	Correct	0 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	332 KB	Output is correct
8	Correct	1 ms	332 KB	Output is correct
9	Correct	1 ms	332 KB	Output is correct
10	Correct	1 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	204 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	344 KB	Output is correct
20	Correct	4 ms	332 KB	Output is correct
21	Correct	2 ms	332 KB	Output is correct
22	Correct	30 ms	332 KB	Output is correct
23	Correct	77 ms	332 KB	Output is correct
24	Correct	29 ms	332 KB	Output is correct
25	Correct	78 ms	344 KB	Output is correct
26	Correct	80 ms	428 KB	Output is correct
27	Correct	0 ms	332 KB	Output is correct
28	Correct	0 ms	204 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	78 ms	432 KB	Output is correct
31	Correct	75 ms	428 KB	Output is correct
32	Correct	1 ms	332 KB	Output is correct
33	Correct	1 ms	332 KB	Output is correct
34	Correct	77 ms	332 KB	Output is correct
35	Incorrect	7 ms	2124 KB	Output isn't correct
36	Halted	0 ms	0 KB	-