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cp-templates
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This commit is contained in:
arielherself 2023-12-02 11:57:02 +08:00
parent 688fe28935
commit 3a00516eff
2 changed files with 8 additions and 8 deletions
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8
segtree/segtree-d.cc
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@ -9,8 +9,8 @@ void update(int s,int t,int &p,int x,int c){ // add constant c to #x
return;
}
int m=s+(t-s>>1);
if(x<=m)update(ls[p],s,m,x,c);
else update(rs[p],m+1,t,x,c);
if(x<=m)update(s,m,ls[p],x,c);
else update(m+1,t,rs[p],x,c);
d[p]=d[ls[p]]+d[rs[p]];
}
@ -18,7 +18,7 @@ int query(int s,int t,int p,int l,int r){ // query range [l,r]
if(!p)return 0;
if(l<=s&&t<=r)return d[p];
int m=s+(t-s>>1),sum=0;
if(l<=m)sum+=query(ls[p],s,m,l,r);
if(r>m) sum+=query(rs[p],m+1,t,l,r);
if(l<=m)sum+=query(s,m,ls[p],l,r);
if(r>m) sum+=query(m+1,t,rs[p],l,r);
return sum;
}

8
segtree/segtree.cc
View File

@ -19,8 +19,8 @@ int getsum(int s,int t,int p,int l,int r){
b[p*2]+=b[p],b[p*2+1]+=b[p];
b[p]=0;
}
if(l<=m)sum+=getsum(l,r,s,m,p*2);
if(r>m) sum+=getsum(l,r,m+1,t,p*2+1);
if(l<=m)sum+=getsum(s,m,p*2,l,r);
if(r>m) sum+=getsum(m+1,t,p*2+1,l,r);
return sum;
}
@ -36,7 +36,7 @@ void update(int s,int t,int p,int l,int r,int c) { // difference c
b[p*2]+=b[p],b[p*2+1]+=b[p];
b[p]=0;
}
if(l<=m)update(l,r,c,s,m,p*2);
if(r>m) update(l,r,c,m+1,t,p*2+1);
if(l<=m)update(s,m,p*2,l,r,c);
if(r>m) update(m+1,t,p*2+1,l,r,c);
d[p]=d[p*2]+d[p*2+1];
}