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답안 #344285

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
344285 2021-01-05T11:53:46 Z TadijaSebez 3단 점프 (JOI19_jumps) C++11
100 / 100
 1520 ms 67308 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int N=500050;
const int M=2*N;
const int inf=1e9+7;
int a[N],ls[M],rs[M],tsz,root,mx1[M],mx2[M],lzy[M];
void Build(int &c, int ss, int se)
{
	c=++tsz;mx2[c]=-inf;lzy[c]=-inf;
	if(ss==se){ mx1[c]=a[ss];return;}
	int mid=ss+se>>1;
	Build(ls[c],ss,mid);
	Build(rs[c],mid+1,se);
	mx1[c]=max(mx1[ls[c]],mx1[rs[c]]);
}
void Upd(int c, int x)
{
	mx2[c]=max(mx2[c],mx1[c]+x);
	lzy[c]=max(lzy[c],x);
}
void Push(int c)
{
	if(lzy[c]!=-inf)
	{
		Upd(ls[c],lzy[c]);
		Upd(rs[c],lzy[c]);
		lzy[c]=-inf;
	}
}
void Set(int c, int ss, int se, int qs, int qe, int x)
{
	if(qs>qe || qs>se || ss>qe) return;
	if(qs<=ss && qe>=se){ Upd(c,x);return;}
	Push(c);
	int mid=ss+se>>1;
	Set(ls[c],ss,mid,qs,qe,x);
	Set(rs[c],mid+1,se,qs,qe,x);
	mx2[c]=max(mx2[ls[c]],mx2[rs[c]]);
}
int Get(int c, int ss, int se, int qs, int qe)
{
	if(qs>qe || qs>se || ss>qe) return -inf;
	if(qs<=ss && qe>=se) return mx2[c];
	Push(c);
	int mid=ss+se>>1;
	return max(Get(ls[c],ss,mid,qs,qe),Get(rs[c],mid+1,se,qs,qe));
}
int n,q,ans[N];
vector<pair<int,int>> Qs[N];
void Add(int x, int y)
{
	int z=y+y-x;
	//printf("%i %i %i\n",x,y,z);
    Set(root,1,n,z,n,a[x]+a[y]);
}
void Solve()
{
	stack<int> st;
	for(int i=n;i>=1;i--)
	{
        while(st.size() && a[st.top()]<=a[i])
		{
			Add(i,st.top());
			st.pop();
		}
		if(st.size()) Add(i,st.top());
		st.push(i);
		for(auto qu:Qs[i])
		{
			ans[qu.second]=Get(root,1,n,i,qu.first);
			//printf("%i:(%i %i)\n",qu.second,i,qu.first);
		}
	}
	//for(int i=1;i<=n;i++) printf("%i ",Get(root,1,n,i,i));printf("\n");
}
int main()
{
	scanf("%i",&n);
	for(int i=1;i<=n;i++) scanf("%i",&a[i]);
	Build(root,1,n);
	scanf("%i",&q);
	for(int i=1;i<=q;i++)
	{
		int l,r;
		scanf("%i %i",&l,&r);
		Qs[l].pb({r,i});
	}
	Solve();
	for(int i=1;i<=q;i++) printf("%i\n",ans[i]);
	return 0;
}

Compilation message

jumps.cpp: In function 'void Build(int&, int, int)':
jumps.cpp:12:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   12 |  int mid=ss+se>>1;
      |          ~~^~~
jumps.cpp: In function 'void Set(int, int, int, int, int, int)':
jumps.cpp:36:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   36 |  int mid=ss+se>>1;
      |          ~~^~~
jumps.cpp: In function 'int Get(int, int, int, int, int)':
jumps.cpp:46:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   46 |  int mid=ss+se>>1;
      |          ~~^~~
jumps.cpp: In function 'int main()':
jumps.cpp:79:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   79 |  scanf("%i",&n);
      |  ~~~~~^~~~~~~~~
jumps.cpp:80:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   80 |  for(int i=1;i<=n;i++) scanf("%i",&a[i]);
      |                        ~~~~~^~~~~~~~~~~~
jumps.cpp:82:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   82 |  scanf("%i",&q);
      |  ~~~~~^~~~~~~~~
jumps.cpp:86:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   86 |   scanf("%i %i",&l,&r);
      |   ~~~~~^~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 12140 KB Output is correct
2 Correct 8 ms 12140 KB Output is correct
3 Correct 8 ms 12140 KB Output is correct
4 Correct 8 ms 12140 KB Output is correct
5 Correct 9 ms 12140 KB Output is correct
6 Correct 8 ms 12140 KB Output is correct
7 Correct 8 ms 12140 KB Output is correct
8 Correct 8 ms 12140 KB Output is correct
9 Correct 8 ms 12140 KB Output is correct
10 Correct 8 ms 12140 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 12140 KB Output is correct
2 Correct 8 ms 12140 KB Output is correct
3 Correct 8 ms 12140 KB Output is correct
4 Correct 8 ms 12140 KB Output is correct
5 Correct 9 ms 12140 KB Output is correct
6 Correct 8 ms 12140 KB Output is correct
7 Correct 8 ms 12140 KB Output is correct
8 Correct 8 ms 12140 KB Output is correct
9 Correct 8 ms 12140 KB Output is correct
10 Correct 8 ms 12140 KB Output is correct
11 Correct 410 ms 30956 KB Output is correct
12 Correct 381 ms 31084 KB Output is correct
13 Correct 376 ms 30956 KB Output is correct
14 Correct 377 ms 30956 KB Output is correct
15 Correct 391 ms 30956 KB Output is correct
16 Correct 391 ms 30444 KB Output is correct
17 Correct 375 ms 30316 KB Output is correct
18 Correct 388 ms 30316 KB Output is correct
19 Correct 394 ms 30828 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 168 ms 22636 KB Output is correct
2 Correct 104 ms 23360 KB Output is correct
3 Correct 104 ms 22508 KB Output is correct
4 Correct 170 ms 22508 KB Output is correct
5 Correct 170 ms 22508 KB Output is correct
6 Correct 166 ms 21868 KB Output is correct
7 Correct 166 ms 21740 KB Output is correct
8 Correct 169 ms 21740 KB Output is correct
9 Correct 169 ms 22208 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 12140 KB Output is correct
2 Correct 8 ms 12140 KB Output is correct
3 Correct 8 ms 12140 KB Output is correct
4 Correct 8 ms 12140 KB Output is correct
5 Correct 9 ms 12140 KB Output is correct
6 Correct 8 ms 12140 KB Output is correct
7 Correct 8 ms 12140 KB Output is correct
8 Correct 8 ms 12140 KB Output is correct
9 Correct 8 ms 12140 KB Output is correct
10 Correct 8 ms 12140 KB Output is correct
11 Correct 410 ms 30956 KB Output is correct
12 Correct 381 ms 31084 KB Output is correct
13 Correct 376 ms 30956 KB Output is correct
14 Correct 377 ms 30956 KB Output is correct
15 Correct 391 ms 30956 KB Output is correct
16 Correct 391 ms 30444 KB Output is correct
17 Correct 375 ms 30316 KB Output is correct
18 Correct 388 ms 30316 KB Output is correct
19 Correct 394 ms 30828 KB Output is correct
20 Correct 168 ms 22636 KB Output is correct
21 Correct 104 ms 23360 KB Output is correct
22 Correct 104 ms 22508 KB Output is correct
23 Correct 170 ms 22508 KB Output is correct
24 Correct 170 ms 22508 KB Output is correct
25 Correct 166 ms 21868 KB Output is correct
26 Correct 166 ms 21740 KB Output is correct
27 Correct 169 ms 21740 KB Output is correct
28 Correct 169 ms 22208 KB Output is correct
29 Correct 1520 ms 61680 KB Output is correct
30 Correct 1388 ms 61744 KB Output is correct
31 Correct 1309 ms 61420 KB Output is correct
32 Correct 1507 ms 61804 KB Output is correct
33 Correct 1510 ms 61500 KB Output is correct
34 Correct 1502 ms 59244 KB Output is correct
35 Correct 1465 ms 58844 KB Output is correct
36 Correct 1519 ms 58896 KB Output is correct
37 Correct 1494 ms 60396 KB Output is correct
38 Correct 908 ms 67308 KB Output is correct
39 Correct 925 ms 67180 KB Output is correct
40 Correct 889 ms 63980 KB Output is correct
41 Correct 890 ms 63560 KB Output is correct
42 Correct 892 ms 63468 KB Output is correct
43 Correct 883 ms 65120 KB Output is correct
44 Correct 988 ms 66668 KB Output is correct
45 Correct 980 ms 66796 KB Output is correct
46 Correct 965 ms 63596 KB Output is correct
47 Correct 978 ms 63116 KB Output is correct
48 Correct 967 ms 63116 KB Output is correct
49 Correct 966 ms 65132 KB Output is correct
50 Correct 1127 ms 65004 KB Output is correct
51 Correct 1125 ms 64876 KB Output is correct
52 Correct 1084 ms 62444 KB Output is correct
53 Correct 1087 ms 61924 KB Output is correct
54 Correct 1097 ms 61820 KB Output is correct
55 Correct 1145 ms 63712 KB Output is correct