#include<bits/stdc++.h>
#define pii pair<int,int>
#define ll long long
#define ff first
#define ss second
using namespace std;
const int inf=1e9+10;
const int mxn=3e5+10;
vector<pii> root[4*mxn];
vector<pair<pii,int>> qrs[4*mxn];
int res[mxn];
struct nod
{
nod *left,*right;
int val;
nod(int v=0,nod *l=NULL,nod *r=NULL):val(v),left(l),right(r){};
void update(int b,int e,int pos,int v)
{
if(b>pos||e<pos)return;
if(b==e)
{
val+=v;
return;
}
int mid=b+e>>1;
if(b<=pos && pos<=mid)
{
if(left==NULL)left=new nod();
left->update(b,mid,pos,v);
val=max(val,left->val);
}
else
{
if(right==NULL)right=new nod();
right->update(mid+1,e,pos,v);
val=max(val,right->val);
}
}
int query(int b,int e,int l,int r)
{
if(b>r||e<l)return 0;
if(b>=l&&e<=r)
{
return val;
}
int mid=b+e>>1;
if(left==NULL && right==NULL)return 0;
if(left==NULL)return right->query(mid+1,e,l,r);
else if(right==NULL) return left->query(b,mid,l,r);
return max(left->query(b,mid,l,r),right->query(mid+1,e,l,r));
}
};
void process(vector<pii> v1,vector<pair<pii,int> > v2)
{
nod *seg=new nod();
for(int i=0;i<v1.size();i++)
{
seg->update(1,mxn,v1[i].ff,v1[i].ss);
}
for(int i=0;i<v2.size();i++)
{
res[v2[i].ss]-=seg->query(1,mxn,v2[i].ff.ff,v2[i].ff.ss);
}
free(seg);
}
void update(int node,int b,int e,int l,int r,int pos,int pos2=0,int ind=0)
{
if(b>r||e<l)return;
if(b>=l&&e<=r)
{
if(ind==0)
root[node].push_back({pos,e-b+1});
else
qrs[node].push_back({{pos,pos2},ind});
return;
}
int w=max(l,b)-min(r,e)+1;
if(ind==0)
root[node].push_back({pos,w});
int mid=b+e>>1;
int left=node<<1;
int right=left|1;
update(left,b,mid,l,r,pos,pos2,ind);
update(right,mid+1,e,l,r,pos,pos2,ind);
}
int tree[4*mxn];
int qr2(int node,int b,int e,int l,int r)
{
if(b>r||e<l)return inf;
if(b>=l&&e<=r)return tree[node];
int m=b+e>>1;
int lf=node<<1;
int rf=lf|1;
return min(qr2(lf,b,m,l,r),qr2(rf,m+1,e,l,r));
}
void upd(int node, int b,int e,int pos,int val)
{
if(b>pos||e<pos)return;
if(b==e)
{
tree[node]=val;
return;
}
int m=b+e>>1;
int l=node<<1;
int r=l|1;
upd(l,b,m,pos,val);
upd(r,m+1,e,pos,val);
tree[node]=min(tree[l],tree[r]);
}
int main()
{
for(int i=0;i<4*mxn;i++)tree[i]=inf;
int n,q;
cin>>n>>q;
int a[n+1];
string s;
cin>>s;
for(int i=0;i<n;i++)
{
char c=s[i];
if(c=='1')a[i+1]=1;
else
{
a[i+1]=0;
upd(1,1,mxn,i+1,1);
}
}
int tk=0;
for(int i=1;i<=q;i++)
{
string s;
cin>>s;
if(s[0]=='q')
{
tk++;
int x,y;
cin>>x>>y;
res[tk]=i;
int k=qr2(1,1,mxn,x,y-1);
if(k!=inf)
{
res[tk]-=i-k+1;
update(1,1,mxn,1,k-1,x,y-1,tk);
continue;
}
update(1,1,mxn,1,i,x,y-1,tk);
}
else
{
int x;
cin>>x;
if(a[x]==1)
{
upd(1,1,mxn,x,i+1);
a[x]=0;
continue;
}
int k=qr2(1,1,mxn,x,x);
upd(1,1,mxn,x,inf);
update(1,1,mxn,k,i,x,0,0);
a[x]=1;
}
}
for(int i=1;i<4*mxn;i++)
{
if(qrs[i].size()>0)process(root[i],qrs[i]);
}
for(int i=1;i<=tk;i++)cout<<res[i]<<endl;
return 0;
}
Compilation message
street_lamps.cpp: In constructor 'nod::nod(int, nod*, nod*)':
street_lamps.cpp:15:6: warning: 'nod::val' will be initialized after [-Wreorder]
int val;
^~~
street_lamps.cpp:14:7: warning: 'nod* nod::left' [-Wreorder]
nod *left,*right;
^~~~
street_lamps.cpp:16:2: warning: when initialized here [-Wreorder]
nod(int v=0,nod *l=NULL,nod *r=NULL):val(v),left(l),right(r){};
^~~
street_lamps.cpp: In member function 'void nod::update(int, int, int, int)':
street_lamps.cpp:26:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int mid=b+e>>1;
~^~
street_lamps.cpp: In member function 'int nod::query(int, int, int, int)':
street_lamps.cpp:49:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int mid=b+e>>1;
~^~
street_lamps.cpp: In function 'void process(std::vector<std::pair<int, int> >, std::vector<std::pair<std::pair<int, int>, int> >)':
street_lamps.cpp:63:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<v1.size();i++)
~^~~~~~~~~~
street_lamps.cpp:68:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<v2.size();i++)
~^~~~~~~~~~
street_lamps.cpp: In function 'void update(int, int, int, int, int, int, int, int)':
street_lamps.cpp:95:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int mid=b+e>>1;
~^~
street_lamps.cpp: In function 'int qr2(int, int, int, int, int)':
street_lamps.cpp:112:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int m=b+e>>1;
~^~
street_lamps.cpp: In function 'void upd(int, int, int, int, int)':
street_lamps.cpp:125:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int m=b+e>>1;
~^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
63 ms |
61432 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1691 ms |
239848 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
65 ms |
61688 KB |
Output is correct |
| 2 |
Incorrect |
66 ms |
61912 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
66 ms |
61372 KB |
Output is correct |
| 2 |
Correct |
65 ms |
61536 KB |
Output is correct |
| 3 |
Incorrect |
65 ms |
61628 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
63 ms |
61432 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
