oj.uz

Submission #161907

# Submission time Handle Problem Language Result Execution time Memory
161907 2019-11-05T09:23:48 Z MvC Bigger segments (IZhO19_segments) C++11
13 / 100
 40 ms 4396 KB 
#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include <bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
using namespace std;
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=3e3+50;
const int mod=1e9+7;
int n,i,nr,j,t,l,r,mid;
ll a[nmax],f[nmax][nmax],pr[nmax];
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n;
	for(i=1;i<=n;i++)
	{
		cin>>a[i];
		pr[i]=pr[i-1]+a[i];
	}
	for(i=0;i<=n;i++)for(j=0;j<=n;j++)f[i][j]=llinf;
	f[0][0]=0;
	for(i=1;i<=n;i++)
	{
		for(j=i;j<=n;j++)
		{
			for(l=0;l<j;l++)if(f[i-1][l]<llinf)break;
			r=j-1;
			while(l<=r)
			{
				mid=(l+r)/2;
				if(f[i-1][mid]<=pr[j]-pr[mid])
				{
					f[i][j]=pr[j]-pr[mid];
					l=mid+1;
				}
				else r=mid-1;
			}
			/*for(t=j-1;t>=0;t--)
			{
				if(f[i-1][t]<=pr[j]-pr[t])
				{
					f[i][j]=pr[j]-pr[t];
					break;
				}
			}*/
		}
		if(f[i][n]<llinf)nr=max(nr,i);
	}
	cout<<nr<<endl;
	return 0;
}

Compilation message

segments.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
segments.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 508 KB Output is correct
2 Correct 16 ms 388 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 476 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 424 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 508 KB Output is correct
2 Correct 16 ms 388 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 476 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 424 KB Output is correct
16 Correct 40 ms 4396 KB Output is correct
17 Correct 40 ms 4392 KB Output is correct
18 Correct 38 ms 4392 KB Output is correct
19 Correct 28 ms 4344 KB Output is correct
20 Correct 26 ms 4316 KB Output is correct
21 Incorrect 39 ms 4396 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 508 KB Output is correct
2 Correct 16 ms 388 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 476 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 424 KB Output is correct
16 Correct 40 ms 4396 KB Output is correct
17 Correct 40 ms 4392 KB Output is correct
18 Correct 38 ms 4392 KB Output is correct
19 Correct 28 ms 4344 KB Output is correct
20 Correct 26 ms 4316 KB Output is correct
21 Incorrect 39 ms 4396 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 508 KB Output is correct
2 Correct 16 ms 388 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 476 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 424 KB Output is correct
16 Correct 40 ms 4396 KB Output is correct
17 Correct 40 ms 4392 KB Output is correct
18 Correct 38 ms 4392 KB Output is correct
19 Correct 28 ms 4344 KB Output is correct
20 Correct 26 ms 4316 KB Output is correct
21 Incorrect 39 ms 4396 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 508 KB Output is correct
2 Correct 16 ms 388 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 476 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 424 KB Output is correct
16 Correct 40 ms 4396 KB Output is correct
17 Correct 40 ms 4392 KB Output is correct
18 Correct 38 ms 4392 KB Output is correct
19 Correct 28 ms 4344 KB Output is correct
20 Correct 26 ms 4316 KB Output is correct
21 Incorrect 39 ms 4396 KB Output isn't correct
22 Halted 0 ms 0 KB -