oj.uz

Submission #287420

# Submission time Handle Problem Language Result Execution time Memory
287420 2020-08-31T16:52:14 Z TadijaSebez Abduction 2 (JOI17_abduction2) C++11
100 / 100
 2265 ms 133624 KB 
#include <bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define ll long long
const int N=50050;
const int L=16;
int a[N],b[N],lgs[N];
struct SparseTable{
	int rmq[N][L],n;
	SparseTable(){}
	void Build(int*a,int n){
		this->n=n;
		for(int i=1;i<=n;i++)rmq[i][0]=a[i];
		for(int j=1;j<L;j++){
			for(int i=1;i<=n-(1<<j)+1;i++){
				rmq[i][j]=max(rmq[i][j-1],rmq[i+(1<<j-1)][j-1]);
			}
		}
	}
	int Get(int l,int r){
		int k=lgs[r-l+1];
		return max(rmq[l][k],rmq[r-(1<<k)+1][k]);
	}
	pii GetRng(int x,int y){
		int top=x-1,bot=1,mid,L=0,R=n+1;
		while(top>=bot){
			mid=top+bot>>1;
			if(Get(mid,x-1)>y)L=mid,bot=mid+1;
			else top=mid-1;
		}
		top=n,bot=x+1;
		while(top>=bot){
			mid=top+bot>>1;
			if(Get(x+1,mid)>y)R=mid,top=mid-1;
			else bot=mid+1;
		}
		return {L,R};
	}
}A,B;
int n,m,q;
map<pii,ll> dp[2];
ll DP(int x,int y,int t){
	if(x<1||x>n||y<1||y>m)return -1;
	if(dp[t].count({x,y}))return dp[t][{x,y}];
	ll ans;
	if(t==0){
		pii rng=A.GetRng(x,b[y]);
		//printf("1: %i %i -> %i %i\n",x,y,rng.first,rng.second);
		ans=max(DP(rng.first,y,1)+x-rng.first,DP(rng.second,y,1)+rng.second-x);
	}else{
		pii rng=B.GetRng(y,a[x]);
		//printf("2: %i %i -> %i %i\n",x,y,rng.first,rng.second);
		ans=max(DP(x,rng.first,0)+y-rng.first,DP(x,rng.second,0)+rng.second-y);
	}
	return dp[t][{x,y}]=ans;
}
int main(){
	for(int i=2;i<N;i++)lgs[i]=lgs[i>>1]+1;
	scanf("%i %i %i",&n,&m,&q);
	for(int i=1;i<=n;i++)scanf("%i",&a[i]);A.Build(a,n);
	for(int i=1;i<=m;i++)scanf("%i",&b[i]);B.Build(b,m);
	while(q--){
		int x,y;
		scanf("%i %i",&x,&y);
		printf("%lld\n",max(DP(x,y,0),DP(x,y,1)));
	}
	return 0;
}

Compilation message

abduction2.cpp: In member function 'void SparseTable::Build(int*, int)':
abduction2.cpp:16:42: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   16 |     rmq[i][j]=max(rmq[i][j-1],rmq[i+(1<<j-1)][j-1]);
      |                                         ~^~
abduction2.cpp: In member function 'std::pair<int, int> SparseTable::GetRng(int, int)':
abduction2.cpp:27:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   27 |    mid=top+bot>>1;
      |        ~~~^~~~
abduction2.cpp:33:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   33 |    mid=top+bot>>1;
      |        ~~~^~~~
abduction2.cpp: In function 'int main()':
abduction2.cpp:60:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   60 |  for(int i=1;i<=n;i++)scanf("%i",&a[i]);A.Build(a,n);
      |  ^~~
abduction2.cpp:60:41: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   60 |  for(int i=1;i<=n;i++)scanf("%i",&a[i]);A.Build(a,n);
      |                                         ^
abduction2.cpp:61:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   61 |  for(int i=1;i<=m;i++)scanf("%i",&b[i]);B.Build(b,m);
      |  ^~~
abduction2.cpp:61:41: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   61 |  for(int i=1;i<=m;i++)scanf("%i",&b[i]);B.Build(b,m);
      |                                         ^
abduction2.cpp:59:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   59 |  scanf("%i %i %i",&n,&m,&q);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~
abduction2.cpp:60:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   60 |  for(int i=1;i<=n;i++)scanf("%i",&a[i]);A.Build(a,n);
      |                       ~~~~~^~~~~~~~~~~~
abduction2.cpp:61:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   61 |  for(int i=1;i<=m;i++)scanf("%i",&b[i]);B.Build(b,m);
      |                       ~~~~~^~~~~~~~~~~~
abduction2.cpp:64:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   64 |   scanf("%i %i",&x,&y);
      |   ~~~~~^~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 488 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 1 ms 512 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 488 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 2 ms 896 KB Output is correct
13 Correct 2 ms 896 KB Output is correct
14 Correct 2 ms 896 KB Output is correct
15 Correct 2 ms 896 KB Output is correct
16 Correct 2 ms 984 KB Output is correct
17 Correct 2 ms 896 KB Output is correct
18 Correct 2 ms 896 KB Output is correct
19 Correct 3 ms 1024 KB Output is correct
20 Correct 4 ms 1152 KB Output is correct
21 Correct 3 ms 1152 KB Output is correct
22 Correct 5 ms 1408 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 488 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 2 ms 896 KB Output is correct
13 Correct 2 ms 896 KB Output is correct
14 Correct 2 ms 896 KB Output is correct
15 Correct 2 ms 896 KB Output is correct
16 Correct 2 ms 984 KB Output is correct
17 Correct 2 ms 896 KB Output is correct
18 Correct 2 ms 896 KB Output is correct
19 Correct 3 ms 1024 KB Output is correct
20 Correct 4 ms 1152 KB Output is correct
21 Correct 3 ms 1152 KB Output is correct
22 Correct 5 ms 1408 KB Output is correct
23 Correct 27 ms 8192 KB Output is correct
24 Correct 28 ms 8212 KB Output is correct
25 Correct 27 ms 8184 KB Output is correct
26 Correct 27 ms 8184 KB Output is correct
27 Correct 27 ms 8184 KB Output is correct
28 Correct 44 ms 13816 KB Output is correct
29 Correct 28 ms 9088 KB Output is correct
30 Correct 93 ms 14712 KB Output is correct
31 Correct 115 ms 16504 KB Output is correct
32 Correct 30 ms 8448 KB Output is correct
33 Correct 44 ms 10260 KB Output is correct

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1024 KB Output is correct
2 Correct 3 ms 1024 KB Output is correct
3 Correct 4 ms 1024 KB Output is correct
4 Correct 4 ms 1024 KB Output is correct
5 Correct 3 ms 1024 KB Output is correct
6 Correct 3 ms 1152 KB Output is correct
7 Correct 3 ms 1024 KB Output is correct
8 Correct 6 ms 1340 KB Output is correct
9 Correct 6 ms 1268 KB Output is correct
10 Correct 5 ms 1280 KB Output is correct
11 Correct 7 ms 1408 KB Output is correct

Subtask #5
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 488 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 2 ms 896 KB Output is correct
13 Correct 2 ms 896 KB Output is correct
14 Correct 2 ms 896 KB Output is correct
15 Correct 2 ms 896 KB Output is correct
16 Correct 2 ms 984 KB Output is correct
17 Correct 2 ms 896 KB Output is correct
18 Correct 2 ms 896 KB Output is correct
19 Correct 3 ms 1024 KB Output is correct
20 Correct 4 ms 1152 KB Output is correct
21 Correct 3 ms 1152 KB Output is correct
22 Correct 5 ms 1408 KB Output is correct
23 Correct 27 ms 8192 KB Output is correct
24 Correct 28 ms 8212 KB Output is correct
25 Correct 27 ms 8184 KB Output is correct
26 Correct 27 ms 8184 KB Output is correct
27 Correct 27 ms 8184 KB Output is correct
28 Correct 44 ms 13816 KB Output is correct
29 Correct 28 ms 9088 KB Output is correct
30 Correct 93 ms 14712 KB Output is correct
31 Correct 115 ms 16504 KB Output is correct
32 Correct 30 ms 8448 KB Output is correct
33 Correct 44 ms 10260 KB Output is correct
34 Correct 4 ms 1024 KB Output is correct
35 Correct 3 ms 1024 KB Output is correct
36 Correct 4 ms 1024 KB Output is correct
37 Correct 4 ms 1024 KB Output is correct
38 Correct 3 ms 1024 KB Output is correct
39 Correct 3 ms 1152 KB Output is correct
40 Correct 3 ms 1024 KB Output is correct
41 Correct 6 ms 1340 KB Output is correct
42 Correct 6 ms 1268 KB Output is correct
43 Correct 5 ms 1280 KB Output is correct
44 Correct 7 ms 1408 KB Output is correct
45 Correct 31 ms 8440 KB Output is correct
46 Correct 32 ms 8480 KB Output is correct
47 Correct 32 ms 8448 KB Output is correct
48 Correct 32 ms 8440 KB Output is correct
49 Correct 32 ms 8440 KB Output is correct
50 Correct 53 ms 13048 KB Output is correct
51 Correct 54 ms 13688 KB Output is correct
52 Correct 158 ms 18680 KB Output is correct
53 Correct 157 ms 18168 KB Output is correct
54 Correct 149 ms 17656 KB Output is correct
55 Correct 235 ms 23032 KB Output is correct
56 Correct 2265 ms 133624 KB Output is correct
57 Correct 511 ms 40736 KB Output is correct
58 Correct 495 ms 38904 KB Output is correct
59 Correct 487 ms 38776 KB Output is correct