Submission #919017

#	Time	Username	Problem	Language	Result	Execution time	Memory
919017		imarn	Segments (IZhO18_segments)	C++14	100 / 100	3709 ms	23384 KiB

segments

#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define vi vector<int>
#define vvi vector<vi>
#define vp vector<pii>
using namespace std;
const int K=1900;
multiset<pair<int,pii>>ms;
vector<pii>bl[120],br[120];
int mn[120]{0},mx[120]{0};
vector<pair<int,pii>>cur,upd;
void build(){
    cur.clear();
    for(auto it : ms)cur.pb({it.s.s-it.s.f+1,{it.s.f,it.s.s}});
    for(int i=0;i<120;i++)bl[i].clear(),br[i].clear(),mx[i]=0,mn[i]=2e9+5;
    sort(all(cur));
    for(int i=0;i<cur.size();i++){
        bl[i/K].pb({cur[i].s.f,cur[i].s.s});
        br[i/K].pb({cur[i].s.s,cur[i].s.f});
        mx[i/K]=max(mx[i/K],cur[i].f);
        mn[i/K]=min(mn[i/K],cur[i].f);
    }for(int i=0;i<120;i++)sort(all(bl[i])),sort(all(br[i]));
    upd.clear();
}
int qr(int k,int le,int re,int ans=0){
    for(int i=0;i<120;i++){
        if(mx[i]<k)continue;
        if(mn[i]>=k){ans+=(int)bl[i].size();continue;}
        for(auto it : bl[i]){
            if(it.s-it.f+1>=k)ans++;
        }
    }
    for(int i=0;i<120;i++){
        if(mx[i]<k)continue;
        if(mn[i]>=k){
            int l=0,r=(int)bl[i].size();
            while(l<r){
                int m=(l+r)>>1;
                if(bl[i][m].f>re-k+1)r=m;
                else l=m+1;
            }ans-=(int)bl[i].size()-l;continue;
        }
        for(auto it : bl[i]){
            if(it.s-it.f+1>=k&&it.f>re-k+1)ans--;
        }
    }
    for(int i=0;i<120;i++){
        if(mx[i]<k)continue;
        if(mn[i]>=k){
            int l=-1,r=(int)br[i].size()-1;
            while(l<r){
                int m=(l+r+1)>>1;
                if(br[i][m].f<le+k-1)l=m;
                else r=m-1;
            }ans-=(l+1);continue;
        }
        for(auto it : br[i]){
            if(it.f-it.s+1>=k&&it.f<le+k-1)ans--;
        }
    }
    for(auto it : upd){
        if(min(re,it.s.s)-max(le,it.s.f)+1>=k)ans+=it.f;
    }return ans;
}int id=1;
pii seg[200006];
int32_t main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n,t;cin>>n>>t;ll res=0;
    for(int i=0;i<n;i++){
        if(i%K==0)build();
        int o;cin>>o;
        if(o==1){
            int a,b;cin>>a>>b;
            a=(a^(t*res)),b=(b^(t*res));
            if(a>b)swap(a,b);seg[id]={a,b};
            ms.insert({id,{a,b}});id++;
            upd.pb({1,{a,b}});
        }
        if(o==2){
            int c;cin>>c;
            ms.erase(ms.lower_bound({c,{0,0}}));
            upd.pb({-1,{seg[c].f,seg[c].s}});
        }
        if(o==3){
            int a,b,k;cin>>a>>b>>k;
            a=(a^(t*res)),b=(b^(t*res));
            if(a>b)swap(a,b);
            if(b-a+1<k)res=0;
            else res=qr(k,a,b);
            cout<<res<<'\n';
        }

    }
}

Compilation message (stderr)

segments.cpp: In function 'void build()':
segments.cpp:23:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for(int i=0;i<cur.size();i++){
      |                 ~^~~~~~~~~~~
segments.cpp: In function 'int32_t main()':
segments.cpp:81:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   81 |             if(a>b)swap(a,b);seg[id]={a,b};
      |             ^~
segments.cpp:81:30: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   81 |             if(a>b)swap(a,b);seg[id]={a,b};
      |                              ^~~

• Subtask 1: 7 / 7
• Subtask 2: 15 / 15
• Subtask 3: 16 / 16
• Subtask 4: 17 / 17
• Subtask 5: 20 / 20
• Subtask 6: 25 / 25