Submission #1136795

#TimeUsernameProblemLanguageResultExecution timeMemory
1136795KasymKSegments (IZhO18_segments)C++17
7 / 100
5092 ms2540 KiB
#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 2e5+5;
vector<pii> v[2], nowv[2];
vector<int> cnt[2], now[2];
pii press[N];

// struct node {
//  int l, r;
//  vector<int> val;
// } seg[N<<2][4];

// void bld(int x, int l, int r, int ind){
// }

// int qry(int x, int l, int r, int val){
// }

int solve(int wh, int l, int r, int k){
    int sm=0;
    if(!cnt[wh].empty())
        sm+=lower_bound(all(cnt[wh]), k)-cnt[wh].begin();
    tr(it, now[wh])
    sm+=(*it<k);
    tr(it, nowv[wh])
    sm+=(it->ss-it->ff+1>=k and (it->ss<l+k-1 or it->ff>r-k+1));
    tr(it, v[wh])
    sm+=(it->ss-it->ff+1>=k and (it->ss<l+k-1 or it->ff>r-k+1));
    return (int)v[wh].size()+(int)nowv[wh].size()-sm;
}

int main(){
    // freopen("file.txt", "r", stdin);
    int q, T;
    scanf("%d%d", &q, &T);
    int id=0, last_ans=0, pk=sqrt(q*log2(q)/4), jem=0;
    while(q--){
        int op;
        scanf("%d", &op);
        if(op==1){
            int a, b;
            scanf("%d%d", &a, &b);
            int l=(a^(T*last_ans)), r=(b^(T*last_ans));
            if(l>r)
                swap(l, r);
            press[++id]={l, r};
            nowv[0].pb({l, r}), now[0].pb(r-l+1);
        }
        else if(op==2){
            int Id;
            scanf("%d", &Id);
            nowv[1].pb(press[Id]), now[1].pb(press[Id].ss-press[Id].ff+1);
        }
        else{
            int a, b, k;
            scanf("%d%d%d", &a, &b, &k);
            int l=(a^(T*last_ans)), r=(b^(T*last_ans));
            if(l>r)
                swap(l, r);
            last_ans=solve(0, l, r, k)-solve(1, l, r, k);
            printf("%d\n", last_ans);
        }
        jem++;
        if(jem==pk){
            // nowv => updates in each block (reload in each check point
            // v => all updates (merge with nowv in each check point)
            // now => update's lengths in each block (reload in each check point)
            // cnt => all update's lengths (merge with now in each check point)
            for(int ad = 0; ad < 2; ++ad){
                tr(it, nowv[ad])
                v[ad].pb(*it);
                nowv[ad].clear();
                tr(it, now[ad])
                cnt[ad].pb(*it);
                now[ad].clear();
                sort(all(cnt[ad]));
            }
            // build the merge sort tree here
        }
    }
    return 0;
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:47:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |     scanf("%d%d", &q, &T);
      |     ~~~~~^~~~~~~~~~~~~~~~
segments.cpp:51:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         scanf("%d", &op);
      |         ~~~~~^~~~~~~~~~~
segments.cpp:54:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |             scanf("%d%d", &a, &b);
      |             ~~~~~^~~~~~~~~~~~~~~~
segments.cpp:63:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |             scanf("%d", &Id);
      |             ~~~~~^~~~~~~~~~~
segments.cpp:68:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |             scanf("%d%d%d", &a, &b, &k);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~~
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