oj.uz

Submission #338902

# Submission time Handle Problem Language Result Execution time Memory
338902 2020-12-24T07:40:23 Z nandonathaniel Bigger segments (IZhO19_segments) C++14
37 / 100
 1446 ms 144620 KB 
#include<bits/stdc++.h>
using namespace std;
const int MAXN=3005;
#pragma GCC optimize("Ofast","unroll-loops","omit-frame-pointer","inline")
#pragma GCC option("arch=native","tune=native","no-zero-upper")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
long long dp[MAXN][MAXN],pref[MAXN],tree[4*MAXN],lazy[4*MAXN];
int a[MAXN];

void updatenode(int now,int L,int R,int val){
	tree[now]=((R-L+1))*val;
	lazy[now]=val;
}
 
void pushdown(int now,int L,int R){
	if(lazy[now]==-1)return;
	int mid=(L+R)/2;
	updatenode(2*now,L,mid,lazy[now]);
	updatenode(2*now+1,mid+1,R,lazy[now]);
	lazy[now]=-1;
}
 
int query(int now,int L,int R,int x,int y){
	if(L>=x && R<=y)return tree[now];
	if(L>y || R<x)return 0;
	pushdown(now,L,R);
	int mid=(L+R)/2;
	return query(2*now,L,mid,x,y)+query(2*now+1,mid+1,R,x,y);
}
 
void update(int now,int L,int R,int x,int y,int val){
	if(L>y || R<x)return;
	if(L>=x && R<=y){
		updatenode(now,L,R,val);
		return;
	}
	int mid=(L+R)/2;
	pushdown(now,L,R);
	update(2*now,L,mid,x,y,val);
	update(2*now+1,mid+1,R,x,y,val);
	tree[now]=tree[2*now]+tree[2*now+1];
}
 
int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	int n;
	cin >> n;
	for(int i=1;i<=n;i++){
		cin >> a[i];
		pref[i]=pref[i-1]+a[i];
	}
	memset(lazy,-1,sizeof(lazy));
	memset(dp,-1,sizeof(dp));
	dp[0][0]=0;
	for(int j=1;j<=n;j++){
		update(1,1,n,j,n,0);
		for(int i=j;i<=n;i++){
			if(dp[i-1][j-1]!=-1){
				long long bil;
				if(dp[i-1][j-1]==0)bil=2*pref[i-1];
				else bil=2*pref[i-1]-pref[dp[i-1][j-1]-1];
				int ki=i,ka=n,res=-1;
				while(ki<=ka){
					int mid=(ki+ka)/2;
					if(pref[mid]>=bil){
						res=mid;
						ka=mid-1;
					}
					else ki=mid+1;
				}
				if(res!=-1)update(1,1,n,res,n,i);
			}
			dp[i][j]=query(1,1,n,i,i);
			if(dp[i][j]==0)dp[i][j]=-1;
		}
	}
	for(int j=n;j>=1;j--){
		if(dp[n][j]!=-1){
			cout << j << '\n';
			break;
		}
	}
	return 0;
}

Compilation message

segments.cpp:5: warning: ignoring #pragma GCC option [-Wunknown-pragmas]
    5 | #pragma GCC option("arch=native","tune=native","no-zero-upper")
      |

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 71148 KB Output is correct
2 Correct 44 ms 71148 KB Output is correct
3 Correct 38 ms 71168 KB Output is correct
4 Correct 37 ms 71148 KB Output is correct
5 Correct 36 ms 71148 KB Output is correct
6 Correct 37 ms 71148 KB Output is correct
7 Correct 38 ms 71148 KB Output is correct
8 Correct 37 ms 71148 KB Output is correct
9 Correct 37 ms 71148 KB Output is correct
10 Correct 37 ms 71148 KB Output is correct
11 Correct 37 ms 71148 KB Output is correct
12 Correct 37 ms 71148 KB Output is correct
13 Correct 40 ms 71148 KB Output is correct
14 Correct 38 ms 71148 KB Output is correct
15 Correct 37 ms 71148 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 71148 KB Output is correct
2 Correct 44 ms 71148 KB Output is correct
3 Correct 38 ms 71168 KB Output is correct
4 Correct 37 ms 71148 KB Output is correct
5 Correct 36 ms 71148 KB Output is correct
6 Correct 37 ms 71148 KB Output is correct
7 Correct 38 ms 71148 KB Output is correct
8 Correct 37 ms 71148 KB Output is correct
9 Correct 37 ms 71148 KB Output is correct
10 Correct 37 ms 71148 KB Output is correct
11 Correct 37 ms 71148 KB Output is correct
12 Correct 37 ms 71148 KB Output is correct
13 Correct 40 ms 71148 KB Output is correct
14 Correct 38 ms 71148 KB Output is correct
15 Correct 37 ms 71148 KB Output is correct
16 Correct 48 ms 71148 KB Output is correct
17 Correct 49 ms 71148 KB Output is correct
18 Correct 54 ms 71148 KB Output is correct
19 Correct 58 ms 71276 KB Output is correct
20 Correct 63 ms 71148 KB Output is correct
21 Correct 52 ms 71148 KB Output is correct
22 Correct 55 ms 71148 KB Output is correct
23 Correct 41 ms 71148 KB Output is correct
24 Correct 51 ms 71148 KB Output is correct
25 Correct 50 ms 71148 KB Output is correct
26 Correct 62 ms 71148 KB Output is correct
27 Correct 64 ms 71148 KB Output is correct
28 Correct 62 ms 71148 KB Output is correct
29 Correct 62 ms 71148 KB Output is correct
30 Correct 63 ms 71148 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 71148 KB Output is correct
2 Correct 44 ms 71148 KB Output is correct
3 Correct 38 ms 71168 KB Output is correct
4 Correct 37 ms 71148 KB Output is correct
5 Correct 36 ms 71148 KB Output is correct
6 Correct 37 ms 71148 KB Output is correct
7 Correct 38 ms 71148 KB Output is correct
8 Correct 37 ms 71148 KB Output is correct
9 Correct 37 ms 71148 KB Output is correct
10 Correct 37 ms 71148 KB Output is correct
11 Correct 37 ms 71148 KB Output is correct
12 Correct 37 ms 71148 KB Output is correct
13 Correct 40 ms 71148 KB Output is correct
14 Correct 38 ms 71148 KB Output is correct
15 Correct 37 ms 71148 KB Output is correct
16 Correct 48 ms 71148 KB Output is correct
17 Correct 49 ms 71148 KB Output is correct
18 Correct 54 ms 71148 KB Output is correct
19 Correct 58 ms 71276 KB Output is correct
20 Correct 63 ms 71148 KB Output is correct
21 Correct 52 ms 71148 KB Output is correct
22 Correct 55 ms 71148 KB Output is correct
23 Correct 41 ms 71148 KB Output is correct
24 Correct 51 ms 71148 KB Output is correct
25 Correct 50 ms 71148 KB Output is correct
26 Correct 62 ms 71148 KB Output is correct
27 Correct 64 ms 71148 KB Output is correct
28 Correct 62 ms 71148 KB Output is correct
29 Correct 62 ms 71148 KB Output is correct
30 Correct 63 ms 71148 KB Output is correct
31 Correct 677 ms 71364 KB Output is correct
32 Correct 691 ms 71276 KB Output is correct
33 Correct 681 ms 71276 KB Output is correct
34 Correct 958 ms 71300 KB Output is correct
35 Correct 1446 ms 71276 KB Output is correct
36 Correct 725 ms 71404 KB Output is correct
37 Correct 458 ms 71404 KB Output is correct
38 Correct 328 ms 71452 KB Output is correct
39 Correct 685 ms 71284 KB Output is correct
40 Correct 652 ms 71404 KB Output is correct
41 Correct 1419 ms 71284 KB Output is correct
42 Correct 1239 ms 71404 KB Output is correct
43 Correct 793 ms 71276 KB Output is correct
44 Correct 1432 ms 71292 KB Output is correct
45 Correct 1347 ms 71404 KB Output is correct

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 71148 KB Output is correct
2 Correct 44 ms 71148 KB Output is correct
3 Correct 38 ms 71168 KB Output is correct
4 Correct 37 ms 71148 KB Output is correct
5 Correct 36 ms 71148 KB Output is correct
6 Correct 37 ms 71148 KB Output is correct
7 Correct 38 ms 71148 KB Output is correct
8 Correct 37 ms 71148 KB Output is correct
9 Correct 37 ms 71148 KB Output is correct
10 Correct 37 ms 71148 KB Output is correct
11 Correct 37 ms 71148 KB Output is correct
12 Correct 37 ms 71148 KB Output is correct
13 Correct 40 ms 71148 KB Output is correct
14 Correct 38 ms 71148 KB Output is correct
15 Correct 37 ms 71148 KB Output is correct
16 Correct 48 ms 71148 KB Output is correct
17 Correct 49 ms 71148 KB Output is correct
18 Correct 54 ms 71148 KB Output is correct
19 Correct 58 ms 71276 KB Output is correct
20 Correct 63 ms 71148 KB Output is correct
21 Correct 52 ms 71148 KB Output is correct
22 Correct 55 ms 71148 KB Output is correct
23 Correct 41 ms 71148 KB Output is correct
24 Correct 51 ms 71148 KB Output is correct
25 Correct 50 ms 71148 KB Output is correct
26 Correct 62 ms 71148 KB Output is correct
27 Correct 64 ms 71148 KB Output is correct
28 Correct 62 ms 71148 KB Output is correct
29 Correct 62 ms 71148 KB Output is correct
30 Correct 63 ms 71148 KB Output is correct
31 Correct 677 ms 71364 KB Output is correct
32 Correct 691 ms 71276 KB Output is correct
33 Correct 681 ms 71276 KB Output is correct
34 Correct 958 ms 71300 KB Output is correct
35 Correct 1446 ms 71276 KB Output is correct
36 Correct 725 ms 71404 KB Output is correct
37 Correct 458 ms 71404 KB Output is correct
38 Correct 328 ms 71452 KB Output is correct
39 Correct 685 ms 71284 KB Output is correct
40 Correct 652 ms 71404 KB Output is correct
41 Correct 1419 ms 71284 KB Output is correct
42 Correct 1239 ms 71404 KB Output is correct
43 Correct 793 ms 71276 KB Output is correct
44 Correct 1432 ms 71292 KB Output is correct
45 Correct 1347 ms 71404 KB Output is correct
46 Runtime error 134 ms 144620 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 37 ms 71148 KB Output is correct
2 Correct 44 ms 71148 KB Output is correct
3 Correct 38 ms 71168 KB Output is correct
4 Correct 37 ms 71148 KB Output is correct
5 Correct 36 ms 71148 KB Output is correct
6 Correct 37 ms 71148 KB Output is correct
7 Correct 38 ms 71148 KB Output is correct
8 Correct 37 ms 71148 KB Output is correct
9 Correct 37 ms 71148 KB Output is correct
10 Correct 37 ms 71148 KB Output is correct
11 Correct 37 ms 71148 KB Output is correct
12 Correct 37 ms 71148 KB Output is correct
13 Correct 40 ms 71148 KB Output is correct
14 Correct 38 ms 71148 KB Output is correct
15 Correct 37 ms 71148 KB Output is correct
16 Correct 48 ms 71148 KB Output is correct
17 Correct 49 ms 71148 KB Output is correct
18 Correct 54 ms 71148 KB Output is correct
19 Correct 58 ms 71276 KB Output is correct
20 Correct 63 ms 71148 KB Output is correct
21 Correct 52 ms 71148 KB Output is correct
22 Correct 55 ms 71148 KB Output is correct
23 Correct 41 ms 71148 KB Output is correct
24 Correct 51 ms 71148 KB Output is correct
25 Correct 50 ms 71148 KB Output is correct
26 Correct 62 ms 71148 KB Output is correct
27 Correct 64 ms 71148 KB Output is correct
28 Correct 62 ms 71148 KB Output is correct
29 Correct 62 ms 71148 KB Output is correct
30 Correct 63 ms 71148 KB Output is correct
31 Correct 677 ms 71364 KB Output is correct
32 Correct 691 ms 71276 KB Output is correct
33 Correct 681 ms 71276 KB Output is correct
34 Correct 958 ms 71300 KB Output is correct
35 Correct 1446 ms 71276 KB Output is correct
36 Correct 725 ms 71404 KB Output is correct
37 Correct 458 ms 71404 KB Output is correct
38 Correct 328 ms 71452 KB Output is correct
39 Correct 685 ms 71284 KB Output is correct
40 Correct 652 ms 71404 KB Output is correct
41 Correct 1419 ms 71284 KB Output is correct
42 Correct 1239 ms 71404 KB Output is correct
43 Correct 793 ms 71276 KB Output is correct
44 Correct 1432 ms 71292 KB Output is correct
45 Correct 1347 ms 71404 KB Output is correct
46 Runtime error 134 ms 144620 KB Execution killed with signal 11 (could be triggered by violating memory limits)
47 Halted 0 ms 0 KB -