oj.uz

Submission #1092542

# Submission time Handle Problem Language Result Execution time Memory
1092542 2024-09-24T10:45:20 Z Sunbae Bigger segments (IZhO19_segments) C++17
100 / 100
 72 ms 20900 KB 
#include <bits/stdc++.h>
#define z exit(0)
#define mp make_pair
#define F first
#define S second
typedef long long ll;
using namespace std;
const ll INF = 1e15;
const int N = 5e5 + 5, inf = 1e8;
pair<int,ll> dp[N];
ll a[N], qs[N];
ll sum(int l, int r){ return qs[r] - ((l) ? qs[l-1] : 0);}
pair<int,ll> f(pair<int,ll> x, pair<int,ll> y){
	if((x.F > y.F) || (x.F == y.F && x.S <= y.S)) return x;
	return y;
}
signed main(){
	int n; scanf("%d", &n);
	for(int i = 0; i<n; ++i) scanf("%lld", a+i), qs[i] = a[i];
	for(int i = 1; i<n; ++i) qs[i] += qs[i-1];
	fill(dp, dp+n, mp(-inf, INF));
	dp[0] = {1, a[0]};
	for(int i = 1; i<n; ++i){
		if(a[i] >= dp[i-1].S){
			dp[i] = f(dp[i], mp(dp[i-1].F + 1, a[i]));
		}else{
			dp[i] = f(dp[i], mp(dp[i-1].F, dp[i-1].S + a[i]));
			int low = i+1, high = n-1, idx = -1;
			while(low <= high){
				int mid = low + ((high-low)>>1);
				if(sum(i, mid) >= dp[i-1].S) idx = mid, high = mid-1;
				else low = mid+1;
			}
			if(idx != -1) dp[idx] = f(dp[idx], mp(dp[i-1].F + 1, sum(i, idx)));
		}
	}
	printf("%d", dp[n-1].F);
}

Compilation message

segments.cpp: In function 'int main()':
segments.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |  int n; scanf("%d", &n);
      |         ~~~~~^~~~~~~~~~
segments.cpp:19:32: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |  for(int i = 0; i<n; ++i) scanf("%lld", a+i), qs[i] = a[i];
      |                           ~~~~~^~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 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 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 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 344 KB Output is correct
18 Correct 0 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 0 ms 348 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 448 KB Output is correct
26 Correct 1 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 348 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 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 344 KB Output is correct
18 Correct 0 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 0 ms 348 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 448 KB Output is correct
26 Correct 1 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 348 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 348 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 496 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 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 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 344 KB Output is correct
18 Correct 0 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 0 ms 348 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 448 KB Output is correct
26 Correct 1 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 348 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 348 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 496 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 11 ms 3844 KB Output is correct
47 Correct 13 ms 3928 KB Output is correct
48 Correct 14 ms 4408 KB Output is correct
49 Correct 12 ms 4444 KB Output is correct
50 Correct 10 ms 4444 KB Output is correct
51 Correct 15 ms 4560 KB Output is correct
52 Correct 8 ms 2396 KB Output is correct
53 Correct 5 ms 1640 KB Output is correct
54 Correct 11 ms 3688 KB Output is correct
55 Correct 14 ms 4444 KB Output is correct
56 Correct 9 ms 3896 KB Output is correct
57 Correct 9 ms 3928 KB Output is correct
58 Correct 12 ms 3932 KB Output is correct
59 Correct 8 ms 3940 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 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 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 344 KB Output is correct
18 Correct 0 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 0 ms 348 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 448 KB Output is correct
26 Correct 1 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 348 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 348 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 496 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 11 ms 3844 KB Output is correct
47 Correct 13 ms 3928 KB Output is correct
48 Correct 14 ms 4408 KB Output is correct
49 Correct 12 ms 4444 KB Output is correct
50 Correct 10 ms 4444 KB Output is correct
51 Correct 15 ms 4560 KB Output is correct
52 Correct 8 ms 2396 KB Output is correct
53 Correct 5 ms 1640 KB Output is correct
54 Correct 11 ms 3688 KB Output is correct
55 Correct 14 ms 4444 KB Output is correct
56 Correct 9 ms 3896 KB Output is correct
57 Correct 9 ms 3928 KB Output is correct
58 Correct 12 ms 3932 KB Output is correct
59 Correct 8 ms 3940 KB Output is correct
60 Correct 9 ms 3932 KB Output is correct
61 Correct 41 ms 18004 KB Output is correct
62 Correct 55 ms 18008 KB Output is correct
63 Correct 62 ms 18408 KB Output is correct
64 Correct 58 ms 20560 KB Output is correct
65 Correct 49 ms 20820 KB Output is correct
66 Correct 72 ms 20900 KB Output is correct
67 Correct 52 ms 16724 KB Output is correct
68 Correct 26 ms 8540 KB Output is correct
69 Correct 56 ms 16980 KB Output is correct
70 Correct 72 ms 20816 KB Output is correct
71 Correct 35 ms 18012 KB Output is correct
72 Correct 42 ms 18268 KB Output is correct
73 Correct 41 ms 18936 KB Output is correct
74 Correct 42 ms 19284 KB Output is correct
75 Correct 40 ms 19280 KB Output is correct