답안 #370717

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
370717	2021-02-24T14:00:46 Z	Kevin_Zhang_TW	Bigger segments (IZhO19_segments)	C++17	100 / 100	112 ms	17036 KB

segments

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV 
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T L, T R) { while (L != R) cerr << *L << " \n"[next(L) == R], ++L; }
#else
#define DE(...) 0
#define debug(...) 0
#endif
 
const int MAX_N = 500010;
const ll inf = 1ll << 58;
 
int dp[MAX_N], n;
ll lstlen[MAX_N];
 
ll a[MAX_N], pf[MAX_N];

ll getb(int i) { return lstlen[i] + pf[i]; }
 
int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> n;
 
	for (int i = 1;i <= n;++i)
		cin >> a[i], pf[i] = pf[i-1] + a[i];
 
	auto valid = [&](int l, int r, int i) {
		return pf[i] - pf[r] >= pf[r] - pf[l-1];
	};

	deque <int> stk1, stk2;

	dp[1] = 1;
	lstlen[1] = a[1];

	for (int i = 2;i <= n;++i) {
		dp[i] = dp[i-1];
		lstlen[i] = lstlen[i-1] + a[i];

		while (stk2.size()) {
			if (getb(stk2.back()) < getb(i-1)) break;
			stk2.pop_back();
		}
		stk2.pb(i-1);

		if (pf[i] >= getb(stk2[0])) {
			++dp[i];
			lstlen[i] = inf;
			while (stk2.size()) {
				if (pf[i] < getb(stk2[0])) 
					break;
				chmin(lstlen[i], pf[i] - pf[stk2[0]]);
				stk2.pop_front();
			}
			stk1 = stk2;
			deque<int>().swap(stk2);
			continue;
		}

		while (stk1.size()) {
			if (pf[i] < getb(stk1[0]))
				break;
			chmin(lstlen[i], pf[i] - pf[stk1[0]]);
			stk1.pop_front();
		}
	}
	cout << dp[n] << '\n';
}

Compilation message

segments.cpp: In function 'int32_t main()':
segments.cpp:35:7: warning: variable 'valid' set but not used [-Wunused-but-set-variable]
   35 |  auto valid = [&](int l, int r, int i) {
      |       ^~~~~

Subtask #1
13.0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	0 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct

Subtask #2
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	0 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	512 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct
30	Correct	1 ms	396 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	0 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	512 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct
30	Correct	1 ms	396 KB	Output is correct
31	Correct	1 ms	492 KB	Output is correct
32	Correct	1 ms	512 KB	Output is correct
33	Correct	1 ms	492 KB	Output is correct
34	Correct	1 ms	492 KB	Output is correct
35	Correct	1 ms	492 KB	Output is correct
36	Correct	1 ms	492 KB	Output is correct
37	Correct	1 ms	492 KB	Output is correct
38	Correct	1 ms	492 KB	Output is correct
39	Correct	1 ms	492 KB	Output is correct
40	Correct	2 ms	512 KB	Output is correct
41	Correct	1 ms	492 KB	Output is correct
42	Correct	1 ms	492 KB	Output is correct
43	Correct	1 ms	492 KB	Output is correct
44	Correct	2 ms	492 KB	Output is correct
45	Correct	1 ms	492 KB	Output is correct

Subtask #4
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	0 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	512 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct
30	Correct	1 ms	396 KB	Output is correct
31	Correct	1 ms	492 KB	Output is correct
32	Correct	1 ms	512 KB	Output is correct
33	Correct	1 ms	492 KB	Output is correct
34	Correct	1 ms	492 KB	Output is correct
35	Correct	1 ms	492 KB	Output is correct
36	Correct	1 ms	492 KB	Output is correct
37	Correct	1 ms	492 KB	Output is correct
38	Correct	1 ms	492 KB	Output is correct
39	Correct	1 ms	492 KB	Output is correct
40	Correct	2 ms	512 KB	Output is correct
41	Correct	1 ms	492 KB	Output is correct
42	Correct	1 ms	492 KB	Output is correct
43	Correct	1 ms	492 KB	Output is correct
44	Correct	2 ms	492 KB	Output is correct
45	Correct	1 ms	492 KB	Output is correct
46	Correct	11 ms	3820 KB	Output is correct
47	Correct	12 ms	3564 KB	Output is correct
48	Correct	14 ms	3948 KB	Output is correct
49	Correct	19 ms	4076 KB	Output is correct
50	Correct	27 ms	3968 KB	Output is correct
51	Correct	19 ms	3948 KB	Output is correct
52	Correct	9 ms	2028 KB	Output is correct
53	Correct	6 ms	1516 KB	Output is correct
54	Correct	13 ms	3308 KB	Output is correct
55	Correct	16 ms	3948 KB	Output is correct
56	Correct	20 ms	3564 KB	Output is correct
57	Correct	16 ms	3820 KB	Output is correct
58	Correct	17 ms	3692 KB	Output is correct
59	Correct	21 ms	3692 KB	Output is correct
60	Correct	16 ms	3692 KB	Output is correct

Subtask #5
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	0 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	364 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	512 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct
30	Correct	1 ms	396 KB	Output is correct
31	Correct	1 ms	492 KB	Output is correct
32	Correct	1 ms	512 KB	Output is correct
33	Correct	1 ms	492 KB	Output is correct
34	Correct	1 ms	492 KB	Output is correct
35	Correct	1 ms	492 KB	Output is correct
36	Correct	1 ms	492 KB	Output is correct
37	Correct	1 ms	492 KB	Output is correct
38	Correct	1 ms	492 KB	Output is correct
39	Correct	1 ms	492 KB	Output is correct
40	Correct	2 ms	512 KB	Output is correct
41	Correct	1 ms	492 KB	Output is correct
42	Correct	1 ms	492 KB	Output is correct
43	Correct	1 ms	492 KB	Output is correct
44	Correct	2 ms	492 KB	Output is correct
45	Correct	1 ms	492 KB	Output is correct
46	Correct	11 ms	3820 KB	Output is correct
47	Correct	12 ms	3564 KB	Output is correct
48	Correct	14 ms	3948 KB	Output is correct
49	Correct	19 ms	4076 KB	Output is correct
50	Correct	27 ms	3968 KB	Output is correct
51	Correct	19 ms	3948 KB	Output is correct
52	Correct	9 ms	2028 KB	Output is correct
53	Correct	6 ms	1516 KB	Output is correct
54	Correct	13 ms	3308 KB	Output is correct
55	Correct	16 ms	3948 KB	Output is correct
56	Correct	20 ms	3564 KB	Output is correct
57	Correct	16 ms	3820 KB	Output is correct
58	Correct	17 ms	3692 KB	Output is correct
59	Correct	21 ms	3692 KB	Output is correct
60	Correct	16 ms	3692 KB	Output is correct
61	Correct	54 ms	17036 KB	Output is correct
62	Correct	52 ms	16364 KB	Output is correct
63	Correct	56 ms	15340 KB	Output is correct
64	Correct	84 ms	14956 KB	Output is correct
65	Correct	112 ms	14956 KB	Output is correct
66	Correct	80 ms	14956 KB	Output is correct
67	Correct	62 ms	12268 KB	Output is correct
68	Correct	32 ms	6764 KB	Output is correct
69	Correct	57 ms	14956 KB	Output is correct
70	Correct	74 ms	14956 KB	Output is correct
71	Correct	95 ms	14956 KB	Output is correct
72	Correct	82 ms	16748 KB	Output is correct
73	Correct	94 ms	15596 KB	Output is correct
74	Correct	103 ms	14956 KB	Output is correct
75	Correct	93 ms	14956 KB	Output is correct

답안 #370717

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