#include <bits/stdc++.h>
using namespace std;
int n,k;
int in[4001][4001];
char C[240001];
int X[240001],Y[240001];
bool sbt2=1,sbt3=1;
void read()
{
cin>>n>>k;
for(int i=1;i<=n+k-1;i++)
{
cin>>C[i]>>X[i];
if(C[i]!='C')cin>>Y[i];
if(C[i]=='S'&&min(X[i],Y[i])!=1)sbt2=0;
if(C[i]=='S'&&abs(X[i]-Y[i])!=1)sbt3=0;
}
}
void slow()
{
for(int i=1;i<=n;i++)
in[i][i]=1;
for(int i=1;i<=n+k-1;i++)
{
int x,y;
char c;
x=X[i];
y=Y[i];
c=C[i];
if(c=='S')
{
for(int j=1;j<=n;j++)
{
in[x][j]=in[y][j]=max(in[x][j],in[y][j]);
}
}
if(c=='C')
{
int cnt=0;
for(int j=1;j<=n;j++)
cnt+=in[j][x];
cout<<cnt<<endl;
}
if(c=='Q')
{
if(in[x][y])cout<<"yes"<<endl;
else cout<<"no"<<endl;
}
}
}
int t[120001];
void subt2()
{
t[1]=1;
int sec=2;
for(int i=1;i<=n+k-1;i++)
{
int x,y;
char c;
x=X[i];
y=Y[i];
c=C[i];
if(c=='S')
{
t[max(x,y)]=sec++;
}
if(c=='Q')
{
if(t[y]&&t[y]<=t[x]||x==1&&t[y]||y==1&&t[x]||x==y)cout<<"yes"<<endl;
else cout<<"no"<<endl;
}
if(c=='C')
{
if(t[x]==0)cout<<1<<endl;
else if(x==1)cout<<sec-1<<endl;
else cout<<sec-t[x]+1<<endl;
}
}
}
int inc[120001],de[120001];
int find_inc(int ver)
{
if(ver==inc[ver])return ver;
return inc[ver]=find_inc(inc[ver]);
}
int find_de(int ver)
{
if(ver==de[ver])return ver;
return de[ver]=find_de(de[ver]);
}
void subt3()
{
int sec=1;
for(int i=1;i<=n+k-1;i++)
{
int x,y;
char c;
x=X[i];
y=Y[i];
c=C[i];
if(c=='S')
{
if(y<x)swap(x,y);
t[x]=sec++;
inc[x]=de[x]=x;
if(t[x-1])inc[x-1]=x;
if(t[x+1])de[x+1]=x;
}
if(c=='Q')
{
swap(x,y);
int ver=x;
if(y>x)
{
if(!t[ver])
{
cout<<"no"<<endl;
continue;
}
ver=find_inc(ver);
if(ver+1>=y)cout<<"yes"<<endl;
else cout<<"no"<<endl;
}
else if(x>y)
{
if(!t[ver-1])
{
cout<<"no"<<endl;
continue;
}
ver=find_de(ver-1);
if(ver<=y)cout<<"yes"<<endl;
else cout<<"no"<<endl;
}
else cout<<"yes"<<endl;
}
if(c=='C')
{
int cnt=1;
/*for(int j=1;j<n;j++)
cout<<inc[j]<<" ";
cout<<endl;*/
if(x!=n&&t[x])
{
//cout<<"! "<<x<<endl;
cnt+=find_inc(x)-x+1;
}
if(x!=1&&t[x-1])
{
//cout<<"!! "<<x-1<<endl;
cnt+=x-find_de(x-1);
}
cout<<cnt<<endl;
}
}
}
int cnt[120001];
int p[120001];
int used[120001];
void subt4()
{
for(int i=1;i<=n;i++)
cnt[i]=1;
int sec=1;
for(int i=1;i<=n+k-1;i++)
{
//cout<<i<<": "<<endl;
int x=X[i],y=Y[i];
char c=C[i];
if(c=='S')
{
int ver=max(x,y);
p[ver]=min(x,y);
t[ver]=sec++;
int last=sec;
while(p[ver]&&t[ver]<last&&t[ver])
{
last=t[ver];
ver=p[ver];
//cout<<ver<<" "<<cnt[max(x,y)]<<endl;
cnt[ver]+=cnt[max(x,y)];
}
}
if(c=='C')
{
int curr=cnt[x],ver=x,last=0;
if(t[x])curr--;
if(t[x]&&t[x*2]&&t[x*2]>t[x])curr-=cnt[x*2];
if(t[x]&&t[x*2+1]&&t[x*2+1]>t[x])curr-=cnt[x*2+1];
while(p[ver]&&t[ver]>last&&t[ver])
{
last=t[ver];
ver=p[ver];
//cout<<ver<<" - "<<cnt[ver]<<endl;
curr+=cnt[ver];
}
cout<<curr<<endl;
}
if(c=='Q')
{
int ver=y,last=0;
bool pos=0;
while(p[ver]&&t[ver]>last&&t[ver])
{
last=t[ver];
ver=p[ver];
used[ver]=i;
if(ver==x)pos=1;
}
ver=x,last=sec;
while(p[ver]&&t[ver]<last&&t[ver])
{
last=t[ver];
ver=p[ver];
if(used[ver]==i||ver==y)pos=1;
}
if(pos)cout<<"yes"<<endl;
else cout<<"no"<<endl;
}
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
read();
/*if(n<=4000)slow();
else if(sbt2)subt2();
else if(sbt3)subt3();
else*/ subt4();
return 0;
}
Compilation message
servers.cpp: In function 'void subt2()':
servers.cpp:74:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
74 | if(t[y]&&t[y]<=t[x]||x==1&&t[y]||y==1&&t[x]||x==y)cout<<"yes"<<endl;
| ~~~~^~~~~~~~~~~~
servers.cpp:74:50: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
74 | if(t[y]&&t[y]<=t[x]||x==1&&t[y]||y==1&&t[x]||x==y)cout<<"yes"<<endl;
| ~~~~^~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
140 ms |
7756 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
140 ms |
7756 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
150 ms |
7860 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
150 ms |
7860 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
143 ms |
7780 KB |
Output is correct |
| 2 |
Incorrect |
181 ms |
10324 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
143 ms |
7780 KB |
Output is correct |
| 2 |
Incorrect |
181 ms |
10324 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
165 ms |
7764 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
165 ms |
7764 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
154 ms |
7764 KB |
Output is correct |
| 2 |
Incorrect |
171 ms |
10456 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
154 ms |
7764 KB |
Output is correct |
| 2 |
Incorrect |
171 ms |
10456 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
153 ms |
7616 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
153 ms |
7616 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
