| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 633368 |
2022-08-22T09:12:43 Z |
codr0 |
Dabbeh (INOI20_dabbeh) |
C++14 |
|
5 ms |
1876 KB |
// Code by Parsa Eslami
#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define FORR(i,a,b) for(int i=a;i>=b;i--)
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define bit(i,j) ((j>>i)&1)
#define F first
#define S second
#define dmid int mid=(r+l)/2
#define lc 2*id
#define rc 2*id+1
#define err(x) cerr<<#x<<"="<<x<<'\n'
#define pb push_back
#define SZ(x) (int)x.size()
#define all(x) x.begin(),x.end()
using namespace std;
const int N=3e5+4;
struct node{
int l,r,sz;
ll ans;
}; node sg[4*N],emp;
pll seg[4*N];
bool B[N];
int b[N];
int n;
struct fenwick{
int fen[N];
void upd(int k,int x){
while(k<N){
fen[k]+=x;
k+=(k&(-k));
}
}
int get(int k){
int rt=0;
while(k>0){
rt+=fen[k];
k-=(k&(-k));
}
return rt;
}
}; fenwick fen;
void build(int id,int l,int r){
seg[id].F=+1;
if(l+1==r){
seg[id].S=b[l];
return;
}
dmid;
build(lc,l,mid);
build(rc,mid,r);
}
void shift(int id){
seg[id].S*=seg[id].F;
seg[lc].F*=seg[id].F;
seg[rc].F*=seg[id].F;
seg[lc].S+=seg[id].S*seg[lc].F;
seg[rc].S+=seg[id].S*seg[rc].F;
seg[id]={+1,0};
}
void upd(int id,int l,int r,int st,int en,ll x){
if(st>=r||en<=l) return;
if(st<=l&&en>=r){
seg[id].S+=x*seg[id].F;
return;
}
shift(id);
dmid;
upd(lc,l,mid,st,en,x);
upd(rc,mid,r,st,en,x);
}
void upd(int id,int l,int r,int st,int en){
if(st>=r||en<=l) return;
if(st<=l&&en>=r){
seg[id].F*=-1;
return;
}
shift(id);
dmid;
upd(lc,l,mid,st,en);
upd(rc,mid,r,st,en);
}
ll get(int id,int l,int r,int x){
if(x<l||x>=r) return 0;
if(l+1==r) return seg[id].F*seg[id].S;
shift(id);
dmid;
return (get(lc,l,mid,x)+get(rc,mid,r,x));
}
node MERGE(node L,node R){
node rt;
if(L.sz==0) return R;
if(R.sz==0) return L;
if(L.l==L.sz) rt.l=L.sz+R.l; else rt.l=L.l;
if(R.r==R.sz) rt.r=L.r+R.sz; else rt.r=R.r;
rt.sz=L.sz+R.sz;
rt.ans=L.ans+R.ans+1LL*L.r*R.l;
return rt;
}
void BUILD(int id,int l,int r){
sg[id].sz=r-l;
if(l+1==r) return;
dmid;
BUILD(lc,l,mid);
BUILD(rc,mid,r);
}
void UPD(int id,int l,int r,int ind,bool v){
if(ind<l||ind>=r) return;
if(l+1==r){
sg[id].ans=sg[id].r=sg[id].l=v;
return;
}
dmid;
UPD(lc,l,mid,ind,v);
UPD(rc,mid,r,ind,v);
sg[id]=MERGE(sg[lc],sg[rc]);
}
node GET(int id,int l,int r,int st,int en){
if(st>=r||en<=l) return emp;
if(st<=l&&en>=r) return sg[id];
dmid;
return MERGE(GET(lc,l,mid,st,en),GET(rc,mid,r,st,en));
}
bool check(int i){
if(i<2||i>n-1) return 0;
int A=get(1,1,n+1,i-1);
int BB=get(1,1,n+1,i);
int C=get(1,1,n+1,i+1);
if(A!=BB&&BB!=C&&((A<BB)^(BB<C))) return 1;
else return 0;
}
int32_t main(){
iostream::sync_with_stdio(0); cin.tie(0);
int q; cin>>n>>q;
FOR(i,1,n) cin>>b[i];
build(1,1,n+1);
BUILD(1,1,n+1);
FOR(i,1,n) UPD(1,1,n+1,i,check(i));
FOR(i,2,n){
B[i]=(b[i]==b[i-1]);
fen.upd(i,B[i]);
}
while(q--){
char id; int l,r; cin>>id>>l>>r;
if(id=='?'){
ll K=2*(r-l+1)-1-fen.get(r)+fen.get(l);
if((r-l+1)>2) K+=GET(1,1,n+1,l+1,r).ans;
cout<<K<<'\n';
}else if(id=='*') upd(1,1,n+1,l,r+1);
else{
int x; cin>>x; upd(1,1,n+1,l,r+1,x);
}
vector<int> ch={l-1,l,r,r+1};
for(int v:ch) if(v>=1&&v<=n) UPD(1,1,n+1,v,check(v));
if(l>1) fen.upd(l,(get(1,1,n+1,l)==get(1,1,n+1,l-1))-B[l]);
if(r<n) fen.upd(r+1,(get(1,1,n+1,r+1)==get(1,1,n+1,r))-B[r+1]);
B[l]=(get(1,1,n+1,l)==get(1,1,n+1,l-1));
B[r+1]=(get(1,1,n+1,r+1)==get(1,1,n+1,r));
/* FOR(i,1,n) cout<<get(1,1,n+1,i)<<" ";
cout<<'\n';
FOR(i,1,n) cout<<GET(1,1,n+1,i,i+1).ans<<" ";
cout<<'\n';*/
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
596 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
5 ms |
1876 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
596 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
