답안 #497934

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
497934	2021-12-24T05:06:02 Z	Ziel	Bigger segments (IZhO19_segments)	C++17	100 / 100	69 ms	15968 KB

segments

/**
 * LES GREATEABLES BRO TEAM
**/

#include <bits/stdc++.h>

using namespace std;

using ll = long long;
#define sz(x) (int)x.size()
const bool FLAG = false;
void setIO(const string &f = "");
#define int ll
const int N = 5e5 + 137;
ll a[N], dp[N], last[N], pref[N];

void solve() {
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++) {
    	cin >> a[i];
    	pref[i] = a[i];
    	pref[i] += pref[i - 1];
    }

    dp[1] = 1;
    last[1] = 1;
    for (int j = 1; j <= n; j++) {
    	int right = 2 * pref[j] - pref[last[j] - 1];

    	int lo = j, hi = n, res = -1;
    	while (lo <= hi) {
    		int mid = (lo + hi) / 2;

    		if (pref[mid] >= right) {
    			res = mid;
    			hi = mid - 1;
    		} else
    			lo = mid + 1;
    	}
    	if (res != -1) {
    		if (dp[res] <= dp[j] + 1) {
    			dp[res] = dp[j] + 1;
    			last[res] = j + 1;
	    	}
	    }
	    if (dp[j + 1] < dp[j]) {
    		dp[j + 1] = dp[j];
    		last[j + 1] = last[j];
    	} else if (dp[j + 1] == dp[j] && last[j] > last[j + 1]) {
    		dp[j + 1] = dp[j];
    		last[j + 1] = last[j];
    	}
    }
    cout << dp[n];
}

signed main() {
    setIO();
    
    int tt = 1;
    if (FLAG) {
    	cin >> tt;
    }
    while (tt--) {
    	solve();
    }
    
    return 0;
}

void setIO(const string &f) {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen((f + ".in").c_str(), "r")) {
        freopen((f + ".in").c_str(), "r", stdin);
        freopen((f + ".out").c_str(), "w", stdout);
    }
}

Compilation message

segments.cpp: In function 'void setIO(const string&)':
segments.cpp:76:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |         freopen((f + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
segments.cpp:77:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |         freopen((f + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

#	결과	메모리	Grader output
1	Correct	332 KB	Output is correct
2	Correct	332 KB	Output is correct
3	Correct	332 KB	Output is correct
4	Correct	332 KB	Output is correct
5	Correct	332 KB	Output is correct
6	Correct	332 KB	Output is correct
7	Correct	332 KB	Output is correct
8	Correct	332 KB	Output is correct
9	Correct	332 KB	Output is correct
10	Correct	332 KB	Output is correct
11	Correct	332 KB	Output is correct
12	Correct	332 KB	Output is correct
13	Correct	332 KB	Output is correct
14	Correct	332 KB	Output is correct
15	Correct	332 KB	Output is correct

Subtask #2
14.0 / 14.0

#	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	0 ms	332 KB	Output is correct
6	Correct	0 ms	332 KB	Output is correct
7	Correct	0 ms	332 KB	Output is correct
8	Correct	0 ms	332 KB	Output is correct
9	Correct	0 ms	332 KB	Output is correct
10	Correct	0 ms	332 KB	Output is correct
11	Correct	0 ms	332 KB	Output is correct
12	Correct	0 ms	332 KB	Output is correct
13	Correct	0 ms	332 KB	Output is correct
14	Correct	0 ms	332 KB	Output is correct
15	Correct	0 ms	332 KB	Output is correct
16	Correct	0 ms	332 KB	Output is correct
17	Correct	0 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	0 ms	332 KB	Output is correct
20	Correct	0 ms	332 KB	Output is correct
21	Correct	0 ms	332 KB	Output is correct
22	Correct	0 ms	332 KB	Output is correct
23	Correct	0 ms	332 KB	Output is correct
24	Correct	0 ms	332 KB	Output is correct
25	Correct	0 ms	332 KB	Output is correct
26	Correct	0 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	0 ms	332 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	0 ms	332 KB	Output is correct

Subtask #3
10.0 / 10.0

#	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	0 ms	332 KB	Output is correct
6	Correct	0 ms	332 KB	Output is correct
7	Correct	0 ms	332 KB	Output is correct
8	Correct	0 ms	332 KB	Output is correct
9	Correct	0 ms	332 KB	Output is correct
10	Correct	0 ms	332 KB	Output is correct
11	Correct	0 ms	332 KB	Output is correct
12	Correct	0 ms	332 KB	Output is correct
13	Correct	0 ms	332 KB	Output is correct
14	Correct	0 ms	332 KB	Output is correct
15	Correct	0 ms	332 KB	Output is correct
16	Correct	0 ms	332 KB	Output is correct
17	Correct	0 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	0 ms	332 KB	Output is correct
20	Correct	0 ms	332 KB	Output is correct
21	Correct	0 ms	332 KB	Output is correct
22	Correct	0 ms	332 KB	Output is correct
23	Correct	0 ms	332 KB	Output is correct
24	Correct	0 ms	332 KB	Output is correct
25	Correct	0 ms	332 KB	Output is correct
26	Correct	0 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	0 ms	332 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	0 ms	332 KB	Output is correct
31	Correct	1 ms	332 KB	Output is correct
32	Correct	1 ms	332 KB	Output is correct
33	Correct	2 ms	332 KB	Output is correct
34	Correct	1 ms	332 KB	Output is correct
35	Correct	1 ms	332 KB	Output is correct
36	Correct	2 ms	332 KB	Output is correct
37	Correct	1 ms	332 KB	Output is correct
38	Correct	1 ms	332 KB	Output is correct
39	Correct	1 ms	332 KB	Output is correct
40	Correct	1 ms	332 KB	Output is correct
41	Correct	1 ms	332 KB	Output is correct
42	Correct	0 ms	332 KB	Output is correct
43	Correct	1 ms	332 KB	Output is correct
44	Correct	1 ms	332 KB	Output is correct
45	Correct	1 ms	332 KB	Output is correct

Subtask #4
36.0 / 36.0

#	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	0 ms	332 KB	Output is correct
6	Correct	0 ms	332 KB	Output is correct
7	Correct	0 ms	332 KB	Output is correct
8	Correct	0 ms	332 KB	Output is correct
9	Correct	0 ms	332 KB	Output is correct
10	Correct	0 ms	332 KB	Output is correct
11	Correct	0 ms	332 KB	Output is correct
12	Correct	0 ms	332 KB	Output is correct
13	Correct	0 ms	332 KB	Output is correct
14	Correct	0 ms	332 KB	Output is correct
15	Correct	0 ms	332 KB	Output is correct
16	Correct	0 ms	332 KB	Output is correct
17	Correct	0 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	0 ms	332 KB	Output is correct
20	Correct	0 ms	332 KB	Output is correct
21	Correct	0 ms	332 KB	Output is correct
22	Correct	0 ms	332 KB	Output is correct
23	Correct	0 ms	332 KB	Output is correct
24	Correct	0 ms	332 KB	Output is correct
25	Correct	0 ms	332 KB	Output is correct
26	Correct	0 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	0 ms	332 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	0 ms	332 KB	Output is correct
31	Correct	1 ms	332 KB	Output is correct
32	Correct	1 ms	332 KB	Output is correct
33	Correct	2 ms	332 KB	Output is correct
34	Correct	1 ms	332 KB	Output is correct
35	Correct	1 ms	332 KB	Output is correct
36	Correct	2 ms	332 KB	Output is correct
37	Correct	1 ms	332 KB	Output is correct
38	Correct	1 ms	332 KB	Output is correct
39	Correct	1 ms	332 KB	Output is correct
40	Correct	1 ms	332 KB	Output is correct
41	Correct	1 ms	332 KB	Output is correct
42	Correct	0 ms	332 KB	Output is correct
43	Correct	1 ms	332 KB	Output is correct
44	Correct	1 ms	332 KB	Output is correct
45	Correct	1 ms	332 KB	Output is correct
46	Correct	8 ms	3456 KB	Output is correct
47	Correct	12 ms	3372 KB	Output is correct
48	Correct	17 ms	3388 KB	Output is correct
49	Correct	12 ms	3372 KB	Output is correct
50	Correct	13 ms	3444 KB	Output is correct
51	Correct	13 ms	3480 KB	Output is correct
52	Correct	9 ms	1892 KB	Output is correct
53	Correct	4 ms	1228 KB	Output is correct
54	Correct	10 ms	3408 KB	Output is correct
55	Correct	13 ms	3400 KB	Output is correct
56	Correct	12 ms	3428 KB	Output is correct
57	Correct	9 ms	3404 KB	Output is correct
58	Correct	10 ms	3372 KB	Output is correct
59	Correct	11 ms	3388 KB	Output is correct
60	Correct	9 ms	3404 KB	Output is correct

Subtask #5
27.0 / 27.0

#	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	0 ms	332 KB	Output is correct
6	Correct	0 ms	332 KB	Output is correct
7	Correct	0 ms	332 KB	Output is correct
8	Correct	0 ms	332 KB	Output is correct
9	Correct	0 ms	332 KB	Output is correct
10	Correct	0 ms	332 KB	Output is correct
11	Correct	0 ms	332 KB	Output is correct
12	Correct	0 ms	332 KB	Output is correct
13	Correct	0 ms	332 KB	Output is correct
14	Correct	0 ms	332 KB	Output is correct
15	Correct	0 ms	332 KB	Output is correct
16	Correct	0 ms	332 KB	Output is correct
17	Correct	0 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	0 ms	332 KB	Output is correct
20	Correct	0 ms	332 KB	Output is correct
21	Correct	0 ms	332 KB	Output is correct
22	Correct	0 ms	332 KB	Output is correct
23	Correct	0 ms	332 KB	Output is correct
24	Correct	0 ms	332 KB	Output is correct
25	Correct	0 ms	332 KB	Output is correct
26	Correct	0 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	0 ms	332 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	0 ms	332 KB	Output is correct
31	Correct	1 ms	332 KB	Output is correct
32	Correct	1 ms	332 KB	Output is correct
33	Correct	2 ms	332 KB	Output is correct
34	Correct	1 ms	332 KB	Output is correct
35	Correct	1 ms	332 KB	Output is correct
36	Correct	2 ms	332 KB	Output is correct
37	Correct	1 ms	332 KB	Output is correct
38	Correct	1 ms	332 KB	Output is correct
39	Correct	1 ms	332 KB	Output is correct
40	Correct	1 ms	332 KB	Output is correct
41	Correct	1 ms	332 KB	Output is correct
42	Correct	0 ms	332 KB	Output is correct
43	Correct	1 ms	332 KB	Output is correct
44	Correct	1 ms	332 KB	Output is correct
45	Correct	1 ms	332 KB	Output is correct
46	Correct	8 ms	3456 KB	Output is correct
47	Correct	12 ms	3372 KB	Output is correct
48	Correct	17 ms	3388 KB	Output is correct
49	Correct	12 ms	3372 KB	Output is correct
50	Correct	13 ms	3444 KB	Output is correct
51	Correct	13 ms	3480 KB	Output is correct
52	Correct	9 ms	1892 KB	Output is correct
53	Correct	4 ms	1228 KB	Output is correct
54	Correct	10 ms	3408 KB	Output is correct
55	Correct	13 ms	3400 KB	Output is correct
56	Correct	12 ms	3428 KB	Output is correct
57	Correct	9 ms	3404 KB	Output is correct
58	Correct	10 ms	3372 KB	Output is correct
59	Correct	11 ms	3388 KB	Output is correct
60	Correct	9 ms	3404 KB	Output is correct
61	Correct	43 ms	15908 KB	Output is correct
62	Correct	62 ms	15936 KB	Output is correct
63	Correct	62 ms	15840 KB	Output is correct
64	Correct	69 ms	15968 KB	Output is correct
65	Correct	58 ms	15876 KB	Output is correct
66	Correct	68 ms	15912 KB	Output is correct
67	Correct	59 ms	12844 KB	Output is correct
68	Correct	29 ms	6528 KB	Output is correct
69	Correct	52 ms	15892 KB	Output is correct
70	Correct	68 ms	15884 KB	Output is correct
71	Correct	42 ms	15840 KB	Output is correct
72	Correct	62 ms	15920 KB	Output is correct
73	Correct	50 ms	15960 KB	Output is correct
74	Correct	50 ms	15940 KB	Output is correct
75	Correct	67 ms	15920 KB	Output is correct

답안 #497934

Compilation message

Subtask #1 13.0 / 13.0

Subtask #2 14.0 / 14.0

Subtask #3 10.0 / 10.0

Subtask #4 36.0 / 36.0

Subtask #5 27.0 / 27.0

Subtask #1
13.0 / 13.0

Subtask #2
14.0 / 14.0

Subtask #3
10.0 / 10.0

Subtask #4
36.0 / 36.0

Subtask #5
27.0 / 27.0