#include<iostream>
#include<vector>
using namespace std;
const int MAXN=2e5+10;
const int n=524288;
int in[MAXN],out[MAXN],dp[MAXN];
int ecnt;
vector<int>adj[MAXN];
void ET(const int&X,int dep)
{
in[X]=++ecnt;
dp[X]=dep++;
for(const int&i:adj[X])
ET(i,dep);
out[X]=++ecnt;
return;
}
inline int mn(const int&x,const int&y)
{
return dp[x]>dp[y]?x:y;
}
int ST[n*2+10],lz[n*2+10];
int query(const int&N,const int&i,const int&x,const int&y)
{
if(x==y)
return mn(ST[N],lz[N]);
int l=N<<1;
int r=l+1;
if(dp[ST[N]]<dp[lz[N]])
{
ST[N]=lz[N];
lz[l]=mn(lz[l],lz[N]);
lz[r]=mn(lz[r],lz[N]);
}
int mid=x+y>>1;
if(i>mid)
return query(r,i,mid+1,y);
return query(l,i,x,mid);
}
void lazy(const int&N,const int&i,const int&j,const int&x,const int&y,const int&X)
{
if(j<x||y<i)
return;
if(i<=x&&y<=j)
{
lz[N]=mn(X,lz[N]);
return;
}
int l=N<<1;
int r=l+1;
if(dp[ST[N]]<dp[lz[N]])
{
ST[N]=lz[N];
lz[l]=mn(lz[l],lz[N]);
lz[r]=mn(lz[r],lz[N]);
}
int mid=x+y>>1;
lazy(l,i,j,x,mid,X);
lazy(r,i,j,mid+1,y,X);
return;
}
inline int MC(const int&X)
{
return query(1,in[X],0,n-1);
}
inline void cut(const int&X)
{
lazy(1,in[X],out[X],0,n-1,X);
return;
}
int N,Q,i;
bool flag;
int A,B,C;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cin>>N>>Q;
for(i=1;i<N;i++)
{
cin>>A;
adj[A-1].push_back(i);
}
ET(0,0);
while(Q-->0)
{
cin>>A>>B>>C;
flag=MC(--A)==MC(--B);
cout<<(flag?"YES":"NO")<<'\n';
if(C==1)
cut(flag?A:B);
}
cout<<endl;
return 0;
}
Compilation message
tree.cpp: In function 'int query(const int&, const int&, const int&, const int&)':
tree.cpp:35:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int mid=x+y>>1;
~^~
tree.cpp: In function 'void lazy(const int&, const int&, const int&, const int&, const int&, const int&)':
tree.cpp:57:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int mid=x+y>>1;
~^~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
5240 KB |
Output is correct |
2 |
Correct |
7 ms |
5376 KB |
Output is correct |
3 |
Correct |
19 ms |
5440 KB |
Output is correct |
4 |
Correct |
8 ms |
5440 KB |
Output is correct |
5 |
Correct |
8 ms |
5440 KB |
Output is correct |
6 |
Correct |
12 ms |
5684 KB |
Output is correct |
7 |
Correct |
8 ms |
5684 KB |
Output is correct |
8 |
Correct |
10 ms |
5684 KB |
Output is correct |
9 |
Correct |
7 ms |
5684 KB |
Output is correct |
10 |
Correct |
7 ms |
5684 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
5240 KB |
Output is correct |
2 |
Correct |
7 ms |
5376 KB |
Output is correct |
3 |
Correct |
19 ms |
5440 KB |
Output is correct |
4 |
Correct |
8 ms |
5440 KB |
Output is correct |
5 |
Correct |
8 ms |
5440 KB |
Output is correct |
6 |
Correct |
12 ms |
5684 KB |
Output is correct |
7 |
Correct |
8 ms |
5684 KB |
Output is correct |
8 |
Correct |
10 ms |
5684 KB |
Output is correct |
9 |
Correct |
7 ms |
5684 KB |
Output is correct |
10 |
Correct |
7 ms |
5684 KB |
Output is correct |
11 |
Correct |
7 ms |
5684 KB |
Output is correct |
12 |
Correct |
8 ms |
5684 KB |
Output is correct |
13 |
Correct |
8 ms |
5684 KB |
Output is correct |
14 |
Correct |
7 ms |
5684 KB |
Output is correct |
15 |
Correct |
10 ms |
5684 KB |
Output is correct |
16 |
Correct |
8 ms |
5736 KB |
Output is correct |
17 |
Correct |
7 ms |
5752 KB |
Output is correct |
18 |
Correct |
10 ms |
5768 KB |
Output is correct |
19 |
Correct |
7 ms |
5784 KB |
Output is correct |
20 |
Correct |
8 ms |
5828 KB |
Output is correct |
21 |
Correct |
7 ms |
5828 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
5240 KB |
Output is correct |
2 |
Correct |
7 ms |
5376 KB |
Output is correct |
3 |
Correct |
19 ms |
5440 KB |
Output is correct |
4 |
Correct |
8 ms |
5440 KB |
Output is correct |
5 |
Correct |
8 ms |
5440 KB |
Output is correct |
6 |
Correct |
12 ms |
5684 KB |
Output is correct |
7 |
Correct |
8 ms |
5684 KB |
Output is correct |
8 |
Correct |
10 ms |
5684 KB |
Output is correct |
9 |
Correct |
7 ms |
5684 KB |
Output is correct |
10 |
Correct |
7 ms |
5684 KB |
Output is correct |
11 |
Correct |
7 ms |
5684 KB |
Output is correct |
12 |
Correct |
8 ms |
5684 KB |
Output is correct |
13 |
Correct |
8 ms |
5684 KB |
Output is correct |
14 |
Correct |
7 ms |
5684 KB |
Output is correct |
15 |
Correct |
10 ms |
5684 KB |
Output is correct |
16 |
Correct |
8 ms |
5736 KB |
Output is correct |
17 |
Correct |
7 ms |
5752 KB |
Output is correct |
18 |
Correct |
10 ms |
5768 KB |
Output is correct |
19 |
Correct |
7 ms |
5784 KB |
Output is correct |
20 |
Correct |
8 ms |
5828 KB |
Output is correct |
21 |
Correct |
7 ms |
5828 KB |
Output is correct |
22 |
Correct |
197 ms |
8056 KB |
Output is correct |
23 |
Correct |
199 ms |
8056 KB |
Output is correct |
24 |
Correct |
201 ms |
8308 KB |
Output is correct |
25 |
Correct |
198 ms |
8308 KB |
Output is correct |
26 |
Correct |
206 ms |
8308 KB |
Output is correct |
27 |
Correct |
173 ms |
8308 KB |
Output is correct |
28 |
Correct |
179 ms |
8308 KB |
Output is correct |
29 |
Correct |
186 ms |
8308 KB |
Output is correct |
30 |
Correct |
158 ms |
8308 KB |
Output is correct |
31 |
Correct |
184 ms |
8308 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
5240 KB |
Output is correct |
2 |
Correct |
7 ms |
5376 KB |
Output is correct |
3 |
Correct |
19 ms |
5440 KB |
Output is correct |
4 |
Correct |
8 ms |
5440 KB |
Output is correct |
5 |
Correct |
8 ms |
5440 KB |
Output is correct |
6 |
Correct |
12 ms |
5684 KB |
Output is correct |
7 |
Correct |
8 ms |
5684 KB |
Output is correct |
8 |
Correct |
10 ms |
5684 KB |
Output is correct |
9 |
Correct |
7 ms |
5684 KB |
Output is correct |
10 |
Correct |
7 ms |
5684 KB |
Output is correct |
11 |
Correct |
432 ms |
30652 KB |
Output is correct |
12 |
Correct |
413 ms |
30708 KB |
Output is correct |
13 |
Correct |
444 ms |
30708 KB |
Output is correct |
14 |
Correct |
404 ms |
30708 KB |
Output is correct |
15 |
Correct |
416 ms |
35004 KB |
Output is correct |
16 |
Correct |
403 ms |
39056 KB |
Output is correct |
17 |
Correct |
458 ms |
44076 KB |
Output is correct |
18 |
Correct |
427 ms |
48524 KB |
Output is correct |
19 |
Correct |
388 ms |
53212 KB |
Output is correct |
20 |
Correct |
396 ms |
56148 KB |
Output is correct |
21 |
Correct |
393 ms |
61708 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
5240 KB |
Output is correct |
2 |
Correct |
7 ms |
5376 KB |
Output is correct |
3 |
Correct |
19 ms |
5440 KB |
Output is correct |
4 |
Correct |
8 ms |
5440 KB |
Output is correct |
5 |
Correct |
8 ms |
5440 KB |
Output is correct |
6 |
Correct |
12 ms |
5684 KB |
Output is correct |
7 |
Correct |
8 ms |
5684 KB |
Output is correct |
8 |
Correct |
10 ms |
5684 KB |
Output is correct |
9 |
Correct |
7 ms |
5684 KB |
Output is correct |
10 |
Correct |
7 ms |
5684 KB |
Output is correct |
11 |
Correct |
7 ms |
5684 KB |
Output is correct |
12 |
Correct |
8 ms |
5684 KB |
Output is correct |
13 |
Correct |
8 ms |
5684 KB |
Output is correct |
14 |
Correct |
7 ms |
5684 KB |
Output is correct |
15 |
Correct |
10 ms |
5684 KB |
Output is correct |
16 |
Correct |
8 ms |
5736 KB |
Output is correct |
17 |
Correct |
7 ms |
5752 KB |
Output is correct |
18 |
Correct |
10 ms |
5768 KB |
Output is correct |
19 |
Correct |
7 ms |
5784 KB |
Output is correct |
20 |
Correct |
8 ms |
5828 KB |
Output is correct |
21 |
Correct |
7 ms |
5828 KB |
Output is correct |
22 |
Correct |
197 ms |
8056 KB |
Output is correct |
23 |
Correct |
199 ms |
8056 KB |
Output is correct |
24 |
Correct |
201 ms |
8308 KB |
Output is correct |
25 |
Correct |
198 ms |
8308 KB |
Output is correct |
26 |
Correct |
206 ms |
8308 KB |
Output is correct |
27 |
Correct |
173 ms |
8308 KB |
Output is correct |
28 |
Correct |
179 ms |
8308 KB |
Output is correct |
29 |
Correct |
186 ms |
8308 KB |
Output is correct |
30 |
Correct |
158 ms |
8308 KB |
Output is correct |
31 |
Correct |
184 ms |
8308 KB |
Output is correct |
32 |
Correct |
432 ms |
30652 KB |
Output is correct |
33 |
Correct |
413 ms |
30708 KB |
Output is correct |
34 |
Correct |
444 ms |
30708 KB |
Output is correct |
35 |
Correct |
404 ms |
30708 KB |
Output is correct |
36 |
Correct |
416 ms |
35004 KB |
Output is correct |
37 |
Correct |
403 ms |
39056 KB |
Output is correct |
38 |
Correct |
458 ms |
44076 KB |
Output is correct |
39 |
Correct |
427 ms |
48524 KB |
Output is correct |
40 |
Correct |
388 ms |
53212 KB |
Output is correct |
41 |
Correct |
396 ms |
56148 KB |
Output is correct |
42 |
Correct |
393 ms |
61708 KB |
Output is correct |
43 |
Correct |
315 ms |
61708 KB |
Output is correct |
44 |
Correct |
344 ms |
61708 KB |
Output is correct |
45 |
Correct |
327 ms |
61708 KB |
Output is correct |
46 |
Correct |
306 ms |
63408 KB |
Output is correct |
47 |
Runtime error |
308 ms |
66560 KB |
Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience. |
48 |
Halted |
0 ms |
0 KB |
- |