oj.uz

Submission #863098

# Submission time Handle Problem Language Result Execution time Memory
863098 2023-10-19T15:21:36 Z LePhiPhat Bigger segments (IZhO19_segments) C++17
100 / 100
 62 ms 20068 KB 
// https://codeforces.com/blog/entry/64479?#comment-484350
#include <iostream>
#include <cstdint>
#include <string>
#include <vector>

using namespace std;

#ifdef DEBUG 
#include "debuge.cpp"
#else
#define debug(...) 42
#endif

typedef            long long ll;
typedef       pair<int, int>  pii;
typedef         pair<ll, ll>  pll;
typedef pair<double, double> pdd;
typedef          vector<int>  vi;
typedef           vector<ll>  vll;
typedef          vector<pii>  vii;

#define                   fi  first
#define                   se  second
#define               all(v)  (v).begin(), (v).end()
#define                SZ(x)  ((int) (x).size())
#define                   pb  push_back
#define                   pf  push_front
#define                   lb  lower_bound
#define                   ub  upper_bound
 
#define         FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define         ROF(i, a, b) for (int i = (a); i > (b); --i)


void LPP(int &test)  {
	int n;
	cin >> n;
	vll a(n + 1), p(n + 1);
	vector<pll> dp(n + 1);      // number of segment - sum
	for (int i = 1; i <= n; i++) cin >> a[i];
	for (int i = 1; i <= n; i++) p[i] = p[i - 1] + a[i];
	// subtask 4 
	dp[0].fi = dp[0].se = 0;
	for (int i = 1; i <= n; i++) {
		dp[i].fi = 0;
		dp[i].se = 5e15;
	}

	dp[0].fi = dp[0].se = 0;
	for (int i = 0; i < n; i++) {
		debug(i, dp[i]);
		if (p[n] - p[i] >= dp[i].se) {
			int lo = i, hi = n + 1;
			while (lo + 1 < hi) {
				int mi = (lo + hi) / 2;
				if (p[mi] - p[i] >= dp[i].se) {
					hi = mi;
				} else {
					lo = mi;
				}
			}
			pll tmp;
			tmp.fi = dp[i].fi;
			tmp.se = dp[i].se + p[hi] - p[i];
			if (tmp.fi > dp[hi].fi) {
				dp[hi] = tmp;
			} else if (tmp.fi == dp[hi].fi) {
				dp[hi].se = min(tmp.se, dp[hi].se);
			}
			tmp.fi = dp[i].fi + 1;
			tmp.se = p[hi] - p[i];
			if (tmp.fi > dp[hi].fi) {
				dp[hi] = tmp;
			} else if (tmp.fi == dp[hi].fi) {
				dp[hi].se = min(tmp.se, dp[hi].se);
			}
			debug(hi, dp[hi]);
		}
		int hi = i + 1;
		pll tmp;
		tmp.fi = dp[i].fi;
		tmp.se = dp[i].se + p[hi] - p[i];
		if (tmp.fi > dp[hi].fi) {
			dp[hi] = tmp;
		} else if (tmp.fi == dp[hi].fi) {
			dp[hi].se = min(tmp.se, dp[hi].se);
		}
		tmp.fi = dp[i].fi + 1;
		tmp.se = p[hi] - p[i];
		if (tmp.se >= dp[i].se) {
			if (tmp.fi > dp[hi].fi) {
				dp[hi] = tmp;
			} else if (tmp.fi == dp[hi].fi) {
				dp[hi].se = min(tmp.se, dp[hi].se);
			}
		}
		debug(i + 1, dp[i + 1]);
	}
	cout << dp[n].fi;
}

int32_t main() {
	cin.tie(0) -> ios::sync_with_stdio(false);
	int tc = 1;
	// cin >> tc;
	for (int i = 1; i <= tc; i++) LPP(i);
}






































/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>
*/

Compilation message

segments.cpp: In function 'void LPP(int&)':
segments.cpp:12:20: warning: statement has no effect [-Wunused-value]
   12 | #define debug(...) 42
      |                    ^~
segments.cpp:52:3: note: in expansion of macro 'debug'
   52 |   debug(i, dp[i]);
      |   ^~~~~
segments.cpp:12:20: warning: statement has no effect [-Wunused-value]
   12 | #define debug(...) 42
      |                    ^~
segments.cpp:78:4: note: in expansion of macro 'debug'
   78 |    debug(hi, dp[hi]);
      |    ^~~~~
segments.cpp:12:20: warning: statement has no effect [-Wunused-value]
   12 | #define debug(...) 42
      |                    ^~
segments.cpp:98:3: note: in expansion of macro 'debug'
   98 |   debug(i + 1, dp[i + 1]);
      |   ^~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 344 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 1 ms 344 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 1 ms 580 KB Output is correct
41 Correct 1 ms 348 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 1 ms 348 KB Output is correct
44 Correct 1 ms 348 KB Output is correct
45 Correct 1 ms 348 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 1 ms 344 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 1 ms 580 KB Output is correct
41 Correct 1 ms 348 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 1 ms 348 KB Output is correct
44 Correct 1 ms 348 KB Output is correct
45 Correct 1 ms 348 KB Output is correct
46 Correct 7 ms 3968 KB Output is correct
47 Correct 11 ms 3972 KB Output is correct
48 Correct 11 ms 4184 KB Output is correct
49 Correct 11 ms 4444 KB Output is correct
50 Correct 13 ms 4440 KB Output is correct
51 Correct 17 ms 4572 KB Output is correct
52 Correct 7 ms 2396 KB Output is correct
53 Correct 4 ms 1628 KB Output is correct
54 Correct 10 ms 3672 KB Output is correct
55 Correct 11 ms 4584 KB Output is correct
56 Correct 9 ms 3932 KB Output is correct
57 Correct 9 ms 3932 KB Output is correct
58 Correct 10 ms 4056 KB Output is correct
59 Correct 9 ms 4180 KB Output is correct
60 Correct 9 ms 3932 KB Output is correct

Subtask #5
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 1 ms 344 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 1 ms 580 KB Output is correct
41 Correct 1 ms 348 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 1 ms 348 KB Output is correct
44 Correct 1 ms 348 KB Output is correct
45 Correct 1 ms 348 KB Output is correct
46 Correct 7 ms 3968 KB Output is correct
47 Correct 11 ms 3972 KB Output is correct
48 Correct 11 ms 4184 KB Output is correct
49 Correct 11 ms 4444 KB Output is correct
50 Correct 13 ms 4440 KB Output is correct
51 Correct 17 ms 4572 KB Output is correct
52 Correct 7 ms 2396 KB Output is correct
53 Correct 4 ms 1628 KB Output is correct
54 Correct 10 ms 3672 KB Output is correct
55 Correct 11 ms 4584 KB Output is correct
56 Correct 9 ms 3932 KB Output is correct
57 Correct 9 ms 3932 KB Output is correct
58 Correct 10 ms 4056 KB Output is correct
59 Correct 9 ms 4180 KB Output is correct
60 Correct 9 ms 3932 KB Output is correct
61 Correct 30 ms 17924 KB Output is correct
62 Correct 41 ms 17908 KB Output is correct
63 Correct 54 ms 18516 KB Output is correct
64 Correct 53 ms 20068 KB Output is correct
65 Correct 57 ms 20056 KB Output is correct
66 Correct 62 ms 20032 KB Output is correct
67 Correct 49 ms 16220 KB Output is correct
68 Correct 28 ms 8540 KB Output is correct
69 Correct 48 ms 16988 KB Output is correct
70 Correct 54 ms 20052 KB Output is correct
71 Correct 38 ms 17744 KB Output is correct
72 Correct 45 ms 18268 KB Output is correct
73 Correct 45 ms 18516 KB Output is correct
74 Correct 52 ms 18868 KB Output is correct
75 Correct 45 ms 18768 KB Output is correct