oj.uz

Submission #370717

# Submission time Handle Problem Language Result Execution time Memory
370717 2021-02-24T14:00:46 Z Kevin_Zhang_TW Bigger segments (IZhO19_segments) C++17
100 / 100
 112 ms 17036 KB 
#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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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