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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. #define pb push_back
  5. #define F first
  6. #define S second
  7. #define all(v) v.begin(),v.end()
  8. #define  P pair
  9. #define V vector
  10. const long long MOD = 1000000007; // 1e9 + 7
  11.  
  12. long long mod(long long a, long long b) {
  13.     return (a % b + b) % b;
  14. }
  15. void file(){
  16.     freopen("input.txt.txt","r",stdin);
  17.     freopen("output.txt.txt","w",stdout);
  18. }
  19. int maxer(int a,int b,int c){
  20.     return max(a,max(b,c));
  21. }
  22. void setio(string s) {
  23.     freopen((s + ".in").c_str(), "r", stdin);
  24.     freopen((s + ".out").c_str(), "w", stdout);
  25. }
  26.  
  27. bool issorted(int n,int A[]){
  28.     for(int i=0;i<n-1;i++){
  29.         if(A[i+1]<A[i])
  30.             return false;
  31.     }
  32.     return true;
  33. }
  34. void dfs(int x,vector<int>graph[],vector<bool>&visited,vector<int>&vp) {
  35.     if (visited[x])return;
  36.     visited[x] = true;
  37.     vp.pb(x);
  38.     for (auto u: graph[x])
  39.         dfs(u, graph, visited, vp);
  40. }
  41. vector<ll>divisors(ll n){
  42.     vector<ll>ans;
  43.     for(ll i=1;i*i<=n;i++){
  44.         if(i*i==n){
  45.             ans.pb(i);
  46.             continue;
  47.         }
  48.         if(n%i==0){
  49.             ans.pb(i);
  50.             ans.pb(n/i);
  51.         }
  52.     }
  53.     return ans;
  54. }
  55. bool check(ll m,const ll A[],ll k){
  56.     return k>=A[m];
  57. }
  58. struct node{
  59.     ll max_seg;
  60.     ll max_pref;
  61.     ll max_suff;
  62.     ll sum;
  63. };
  64. struct segtree{
  65.     int size;
  66.     V<int>sums;
  67.     int value(int i){
  68.         return sums[i+size];
  69.     }
  70.     void init(int n){
  71.         size=1;
  72.         while(size<n)size*=2;
  73.         sums.assign(2*size,0LL);
  74.     }
  75.     void set(int i,int v){
  76.         i+=size;
  77.         sums[i]=v;
  78.         for(i/=2;i>=1;i/=2){
  79.             sums[i]=sums[2*i]+sums[2*i+1];
  80.         }
  81.     }
  82.     int result(int k){
  83.         int search=1;
  84.         while(search<size){
  85.             int s1=sums[search*2];
  86.             if(s1>=k+1)
  87.                 search*=2;
  88.             else
  89.                 search=search*2+1;
  90.         }
  91.         return search-size;
  92.     }
  93. };
  94. void solve(){
  95.  int n,q;
  96.  cin>>n>>q;
  97.  segtree st;
  98.  st.init(n);
  99.  for(int i=0;i<n;i++){
  100.      int x;
  101.      cin>>x;
  102.      st.set(i,x);
  103.  }
  104.  while(q--){
  105.      int t;
  106.      cin>>t;
  107.      if(t==1){
  108.          int index;
  109.          cin>>index;
  110.          if(st.value(index)==1)
  111.              st.set(index,0);
  112.          else
  113.              st.set(index,1);
  114.      }
  115.      else{
  116.          int k;
  117.          cin>>k;
  118.          cout<<st.result(k)<<endl;
  119.      }
  120.  }
  121. }
  122.  
  123.  
  124. int main(){
  125.    //file();
  126.    solve();
  127.     return 0;
  128. }
Success #stdin #stdout 0.01s 5284KB
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https://ideone.com/T1U9z5
language:
C++14 (gcc 8.3)
created:
235 days ago
visibility:
secret

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