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Submission #342537

# Submission time Handle Problem Language Result Execution time Memory
342537 2021-01-02T10:44:32 Z NurstanDuisengaliev Bigger segments (IZhO19_segments) C++14
37 / 100
 223 ms 72172 KB 
// Nurstan Duisengaliev
// не, не надо меня узнавать 
/*#pragma GCC target ("avx2")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("O3")*/                   
      
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp> 
 
#define ll long long
#define all(x) x.begin(), x.end()
#define in insert
#define mp make_pair
#define F first
#define S second
#define ppf pop_front
#define pb push_back
#define ppb pop_back
#define pf push_front
#define pii pair <int, int>
#define pll pair <ll, ll>
#define boost() ios_base::sync_with_stdio(0), cin.tie(0)
#define sz(x) (int)x.size()
 
using namespace std;
//using namespace __gnu_pbds;
 
//template<typename T> using ordered_set = tree <T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;                         
 
const int N = 3005;
const int mod = (int)1e9 + 7;
const ll INF = (ll)1e18 + 1;
int n;
ll a[N], pref[N]; 
int dp[N][N];
void solve () {
	cin >> n;
	for (int i = 1; i <= n; i ++) {
		cin >> a[i];
		pref[i] = pref[i - 1] + a[i];
		for (int j = 1; j <= n; j ++) dp[i][j] = -1;
		dp[i][i] = 1;
	}                                         	
	for (int i = 1; i < n; i ++) {                            
		for (int j = 1; j <= i; j ++) { 
			ll x = pref[i] - pref[i - j];
			if (dp[i][j] != -1) {
				dp[i + 1][j + 1] = max (dp[i + 1][j + 1], dp[i][j]);
				int pos = -1;
				int l = i + 1, r = n;
				while (l <= r) {         
					int mid = l + r >> 1;
					if (pref[mid] - pref[i] >= x) {
						r = mid - 1;
						pos = mid;
					}
					else {
						l = mid + 1;
					}
				}
				if (pos != -1) dp[pos][pos - i] = max (dp[pos][pos - i], dp[i][j] + 1);
			}
		}
	}
	int maxi = 0;
	for (int i = 1; i <= n; i ++) {
		maxi = max (maxi, dp[n][i]);
	}
	cout << maxi;
}   	
 
main () {
//	freopen (".in", "r", stdin);
//	freopen (".out", "w", stdout);
	boost ();
	int TT = 1;
//    cin >> TT;
	while (TT --) {
		solve ();
	}
	return 0;	                                    
}

Compilation message

segments.cpp: In function 'void solve()':
segments.cpp:55:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   55 |      int mid = l + r >> 1;
      |                ~~^~~
segments.cpp: At global scope:
segments.cpp:75:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   75 | main () {
      |       ^

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 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 0 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 512 KB Output is correct
13 Correct 1 ms 504 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 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 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 0 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 512 KB Output is correct
13 Correct 1 ms 504 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 3 ms 3308 KB Output is correct
17 Correct 4 ms 3308 KB Output is correct
18 Correct 4 ms 3308 KB Output is correct
19 Correct 3 ms 3308 KB Output is correct
20 Correct 4 ms 3308 KB Output is correct
21 Correct 5 ms 3308 KB Output is correct
22 Correct 3 ms 2668 KB Output is correct
23 Correct 2 ms 1900 KB Output is correct
24 Correct 5 ms 3308 KB Output is correct
25 Correct 4 ms 3308 KB Output is correct
26 Correct 4 ms 3308 KB Output is correct
27 Correct 3 ms 3308 KB Output is correct
28 Correct 4 ms 3308 KB Output is correct
29 Correct 5 ms 3308 KB Output is correct
30 Correct 4 ms 3308 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 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 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 0 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 512 KB Output is correct
13 Correct 1 ms 504 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 3 ms 3308 KB Output is correct
17 Correct 4 ms 3308 KB Output is correct
18 Correct 4 ms 3308 KB Output is correct
19 Correct 3 ms 3308 KB Output is correct
20 Correct 4 ms 3308 KB Output is correct
21 Correct 5 ms 3308 KB Output is correct
22 Correct 3 ms 2668 KB Output is correct
23 Correct 2 ms 1900 KB Output is correct
24 Correct 5 ms 3308 KB Output is correct
25 Correct 4 ms 3308 KB Output is correct
26 Correct 4 ms 3308 KB Output is correct
27 Correct 3 ms 3308 KB Output is correct
28 Correct 4 ms 3308 KB Output is correct
29 Correct 5 ms 3308 KB Output is correct
30 Correct 4 ms 3308 KB Output is correct
31 Correct 27 ms 35692 KB Output is correct
32 Correct 80 ms 35692 KB Output is correct
33 Correct 125 ms 35712 KB Output is correct
34 Correct 80 ms 35692 KB Output is correct
35 Correct 127 ms 35692 KB Output is correct
36 Correct 149 ms 35820 KB Output is correct
37 Correct 103 ms 29932 KB Output is correct
38 Correct 63 ms 23936 KB Output is correct
39 Correct 145 ms 35692 KB Output is correct
40 Correct 127 ms 35692 KB Output is correct
41 Correct 121 ms 35692 KB Output is correct
42 Correct 91 ms 35820 KB Output is correct
43 Correct 96 ms 35820 KB Output is correct
44 Correct 121 ms 35740 KB Output is correct
45 Correct 117 ms 35692 KB Output is correct

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 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 0 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 512 KB Output is correct
13 Correct 1 ms 504 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 3 ms 3308 KB Output is correct
17 Correct 4 ms 3308 KB Output is correct
18 Correct 4 ms 3308 KB Output is correct
19 Correct 3 ms 3308 KB Output is correct
20 Correct 4 ms 3308 KB Output is correct
21 Correct 5 ms 3308 KB Output is correct
22 Correct 3 ms 2668 KB Output is correct
23 Correct 2 ms 1900 KB Output is correct
24 Correct 5 ms 3308 KB Output is correct
25 Correct 4 ms 3308 KB Output is correct
26 Correct 4 ms 3308 KB Output is correct
27 Correct 3 ms 3308 KB Output is correct
28 Correct 4 ms 3308 KB Output is correct
29 Correct 5 ms 3308 KB Output is correct
30 Correct 4 ms 3308 KB Output is correct
31 Correct 27 ms 35692 KB Output is correct
32 Correct 80 ms 35692 KB Output is correct
33 Correct 125 ms 35712 KB Output is correct
34 Correct 80 ms 35692 KB Output is correct
35 Correct 127 ms 35692 KB Output is correct
36 Correct 149 ms 35820 KB Output is correct
37 Correct 103 ms 29932 KB Output is correct
38 Correct 63 ms 23936 KB Output is correct
39 Correct 145 ms 35692 KB Output is correct
40 Correct 127 ms 35692 KB Output is correct
41 Correct 121 ms 35692 KB Output is correct
42 Correct 91 ms 35820 KB Output is correct
43 Correct 96 ms 35820 KB Output is correct
44 Correct 121 ms 35740 KB Output is correct
45 Correct 117 ms 35692 KB Output is correct
46 Runtime error 223 ms 72172 KB Execution killed with signal 11 (could be triggered by violating memory limits)
47 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 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 0 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 512 KB Output is correct
13 Correct 1 ms 504 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 3 ms 3308 KB Output is correct
17 Correct 4 ms 3308 KB Output is correct
18 Correct 4 ms 3308 KB Output is correct
19 Correct 3 ms 3308 KB Output is correct
20 Correct 4 ms 3308 KB Output is correct
21 Correct 5 ms 3308 KB Output is correct
22 Correct 3 ms 2668 KB Output is correct
23 Correct 2 ms 1900 KB Output is correct
24 Correct 5 ms 3308 KB Output is correct
25 Correct 4 ms 3308 KB Output is correct
26 Correct 4 ms 3308 KB Output is correct
27 Correct 3 ms 3308 KB Output is correct
28 Correct 4 ms 3308 KB Output is correct
29 Correct 5 ms 3308 KB Output is correct
30 Correct 4 ms 3308 KB Output is correct
31 Correct 27 ms 35692 KB Output is correct
32 Correct 80 ms 35692 KB Output is correct
33 Correct 125 ms 35712 KB Output is correct
34 Correct 80 ms 35692 KB Output is correct
35 Correct 127 ms 35692 KB Output is correct
36 Correct 149 ms 35820 KB Output is correct
37 Correct 103 ms 29932 KB Output is correct
38 Correct 63 ms 23936 KB Output is correct
39 Correct 145 ms 35692 KB Output is correct
40 Correct 127 ms 35692 KB Output is correct
41 Correct 121 ms 35692 KB Output is correct
42 Correct 91 ms 35820 KB Output is correct
43 Correct 96 ms 35820 KB Output is correct
44 Correct 121 ms 35740 KB Output is correct
45 Correct 117 ms 35692 KB Output is correct
46 Runtime error 223 ms 72172 KB Execution killed with signal 11 (could be triggered by violating memory limits)
47 Halted 0 ms 0 KB -