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  1. #include<bits/stdc++.h>
  2. #define ll long long
  3. #define endl "\n"
  4. #define mii map<int,int>
  5. #define mll map<ll,ll>
  6. #define pii pair<int,int>
  7. #define pli pair<ll,int>
  8. #define pll pair<ll,ll>
  9. #define inf 1000000000000000000LL
  10. #define fi first
  11. #define se second
  12. using namespace std;
  13. int n, m, a[100005], b[100005], st[400005], lazy[400005], rpos;
  14. void fix(int id, int val) {
  15.     st[id]=val;
  16.     lazy[id]=val;
  17.     return;
  18. }
  19. void down(int id, int l, int mid) {
  20.     if (lazy[id]!=0) {
  21.         fix(id*2,lazy[id]);
  22.         fix(id*2+1,lazy[id]+mid-l+1);
  23.         lazy[id]=0;
  24.     }
  25.     return;
  26. }
  27. void upd(int id, int l, int r, int u, int v, int le) {
  28.     if (l>v || r<u) return;
  29.     if (l>=u && r<=v) {
  30.         fix(id,le+l-u);
  31.         return;
  32.     }
  33.     int mid=(l+r)>>1;
  34.     down(id,l,mid);
  35.     upd(id*2,l,mid,u,v,le);
  36.     upd(id*2+1,mid+1,r,u,v,le);
  37.     return;
  38. }
  39. void gpos(int id, int l, int r, int pos) {
  40.     if (l>pos || r<pos) return;
  41.     if (l==r) {
  42.         rpos=st[id];
  43.         return;
  44.     }
  45.     int mid=(l+r)>>1;
  46.     down(id,l,mid);
  47.     gpos(id*2,l,mid,pos);
  48.     gpos(id*2+1,mid+1,r,pos);
  49.     return;
  50. }
  51. int main() {
  52.     ios_base::sync_with_stdio(false);
  53.     cin.tie(nullptr); cout.tie(nullptr);
  54.     cin>>n>>m;
  55.     for (int i=1; i<=n; i++) {
  56.         cin>>a[i];
  57.     }
  58.     for (int i=1; i<=n; i++) {
  59.         cin>>b[i];
  60.     }
  61.     while (m--) {
  62.         int t; cin>>t;
  63.         if (t==1) {
  64.             int x, y, k;
  65.             cin>>x>>y>>k;
  66.             upd(1,1,n,y,y+k-1,x);
  67.         }
  68.         else {
  69.             int x; cin>>x;
  70.             gpos(1,1,n,x);
  71.             if (rpos==0) cout<<b[x];
  72.             else cout<<a[rpos];
  73.             cout<<endl;
  74.         }
  75.     }
  76.     return 0;
  77. }
  78.  
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/zyjRFo
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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