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Submission #224531

# Submission time Handle Problem Language Result Execution time Memory
224531 2020-04-18T10:31:20 Z kshitij_sodani Feast (NOI19_feast) C++17
53 / 100
 241 ms 117428 KB 
#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define a first
#define b second
#define pb push_back
typedef long long int llo;
llo mod=1000000007;
llo dp[2001][2001];
llo cost[2001][2001];
llo ma=0;
llo dnc(llo ind,llo l,llo r,llo ll,llo rr){
	llo mid=(l+r)/2;
	pair<llo,llo> best={-1,-1};
	for(llo i=ll;i<=rr;i++){
		if(i>mid){
			continue;
		}
		if(i==ll){
			if(i==0){
				best={-cost[0][mid],i};
			}
			else{
				best={-dp[i-1][ind-1]-cost[i][mid],i};
			}
		}

		else{
			best=min(best,{-dp[i-1][ind-1]-cost[i][mid],i});
		}
	}
	if(best.a==-1){
			while(true){
				continue;
			}
		}
	dp[mid][ind]=-best.a;

	ma=max(ma,dp[mid][ind]);
	if(mid>l){
		dnc(ind,l,mid-1,ll,best.b);
	}
	if(mid<r){
		dnc(ind,mid+1,r,best.b,rr);
	}
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	llo n,k;
	cin>>n>>k;

	llo it[n];
	for(llo i=0;i<n;i++){
		cin>>it[i];
	}
	llo ind=0;
	vector<llo> aa;
	while(ind<n){
		if(it[ind]<=0){
			llo su=0;
			while(ind<n){
				if(it[ind]>0){
					break;
				}
				su+=it[ind];
				ind+=1;
			}
			aa.pb(su);
		}
		if(it[ind]>0){
			llo su=0;
			while(ind<n){
				if(it[ind]<0){
					break;
				}
				su+=it[ind];
				ind+=1;
			}
			aa.pb(su);
		}
	}
	llo j=0;
	for(llo i=0;i<aa.size();i++){
		if(aa[i]>0){
			llo ma=0;
			llo su=0;
			llo ind=i;
			llo ind2=j;
			while(ind>=0){
				su+=aa[ind];
				ma=max(ma,su);
				if(aa[ind]>0){
					cost[ind2][j]=ma;
					ind2-=1;
				}
				ind-=1;
			}	
			j+=1;
		}
	}
	for(llo i=0;i<j;i++){
		dp[i][0]=cost[0][i];
		ma=max(ma,cost[0][i]);
	}
	for(llo jj=1;jj<min(j,k);jj++){
		dnc(jj,0,j-1,0,j-1);

	}
	cout<<ma<<endl;













	return 0;
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:84:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(llo i=0;i<aa.size();i++){
              ~^~~~~~~~~~
feast.cpp: In function 'llo dnc(llo, llo, llo, llo, llo)':
feast.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 2552 KB Output is correct
2 Correct 44 ms 2680 KB Output is correct
3 Correct 46 ms 2688 KB Output is correct
4 Correct 45 ms 2680 KB Output is correct
5 Correct 47 ms 2680 KB Output is correct
6 Correct 46 ms 2552 KB Output is correct
7 Correct 46 ms 2680 KB Output is correct
8 Correct 44 ms 2680 KB Output is correct
9 Correct 45 ms 2680 KB Output is correct
10 Correct 46 ms 2680 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 2688 KB Output is correct
2 Correct 26 ms 2688 KB Output is correct
3 Correct 27 ms 2688 KB Output is correct
4 Correct 29 ms 2688 KB Output is correct
5 Correct 51 ms 2680 KB Output is correct
6 Correct 27 ms 2688 KB Output is correct
7 Correct 39 ms 2680 KB Output is correct
8 Correct 43 ms 2684 KB Output is correct
9 Correct 43 ms 2552 KB Output is correct
10 Correct 28 ms 2688 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 241 ms 117428 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 512 KB Output is correct
2 Correct 4 ms 512 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 512 KB Output is correct
10 Correct 5 ms 512 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 512 KB Output is correct
2 Correct 4 ms 512 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 512 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 5 ms 1024 KB Output is correct
12 Correct 5 ms 896 KB Output is correct
13 Correct 5 ms 896 KB Output is correct
14 Correct 6 ms 1024 KB Output is correct
15 Correct 5 ms 896 KB Output is correct
16 Correct 5 ms 896 KB Output is correct
17 Correct 5 ms 1024 KB Output is correct
18 Correct 5 ms 1024 KB Output is correct
19 Correct 5 ms 896 KB Output is correct
20 Correct 5 ms 896 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 512 KB Output is correct
2 Correct 4 ms 512 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 512 KB Output is correct
8 Correct 5 ms 512 KB Output is correct
9 Correct 5 ms 512 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 5 ms 1024 KB Output is correct
12 Correct 5 ms 896 KB Output is correct
13 Correct 5 ms 896 KB Output is correct
14 Correct 6 ms 1024 KB Output is correct
15 Correct 5 ms 896 KB Output is correct
16 Correct 5 ms 896 KB Output is correct
17 Correct 5 ms 1024 KB Output is correct
18 Correct 5 ms 1024 KB Output is correct
19 Correct 5 ms 896 KB Output is correct
20 Correct 5 ms 896 KB Output is correct
21 Correct 11 ms 5888 KB Output is correct
22 Correct 15 ms 7168 KB Output is correct
23 Correct 13 ms 6784 KB Output is correct
24 Correct 11 ms 6144 KB Output is correct
25 Correct 12 ms 6656 KB Output is correct
26 Correct 11 ms 6016 KB Output is correct
27 Correct 12 ms 6528 KB Output is correct
28 Correct 8 ms 5504 KB Output is correct
29 Correct 8 ms 5248 KB Output is correct
30 Correct 7 ms 5120 KB Output is correct

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 2552 KB Output is correct
2 Correct 44 ms 2680 KB Output is correct
3 Correct 46 ms 2688 KB Output is correct
4 Correct 45 ms 2680 KB Output is correct
5 Correct 47 ms 2680 KB Output is correct
6 Correct 46 ms 2552 KB Output is correct
7 Correct 46 ms 2680 KB Output is correct
8 Correct 44 ms 2680 KB Output is correct
9 Correct 45 ms 2680 KB Output is correct
10 Correct 46 ms 2680 KB Output is correct
11 Correct 31 ms 2688 KB Output is correct
12 Correct 26 ms 2688 KB Output is correct
13 Correct 27 ms 2688 KB Output is correct
14 Correct 29 ms 2688 KB Output is correct
15 Correct 51 ms 2680 KB Output is correct
16 Correct 27 ms 2688 KB Output is correct
17 Correct 39 ms 2680 KB Output is correct
18 Correct 43 ms 2684 KB Output is correct
19 Correct 43 ms 2552 KB Output is correct
20 Correct 28 ms 2688 KB Output is correct
21 Runtime error 241 ms 117428 KB Execution killed with signal 11 (could be triggered by violating memory limits)
22 Halted 0 ms 0 KB -