Submission #988579

#	Time	Username	Problem	Language	Result	Execution time	Memory
988579		erering	Poklon (COCI17_poklon)	C++17	84 / 140	144 ms	14296 KiB

poklon

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define int long long
#define inf 2e18
#define endl '\n'
const int N=1e5+2,MAXN=1e6+2;
int n,q,a[N],offset=1;
int seg[N*4];
void update(int idx,int val){
    idx+=offset;
    seg[idx]=val;
    idx/=2;
    while(idx>0){
        seg[idx]=seg[idx*2]+seg[idx*2+1];
        idx/=2;
    }
}
int query(int node,int qlo,int qhi,int lo,int hi){
    if(lo>=qlo && hi<=qhi)return seg[node];
    if(lo>qhi || hi<qlo)return 0;
    int mid=(lo+hi)/2;
    return query(node*2,qlo,qhi,lo,mid)+query(node*2+1,qlo,qhi,mid+1,hi);
}
signed main(){
    //srand(time(NULL))
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int n,q; cin>>n>>q;
    while(offset<n)offset*=2;
    for(int i=0;i<n;i++){
        cin>>a[i];
    }
    vector<pair<int,int>> vec,og;
    while(q--){
        int l,r; cin>>l>>r;
        vec.pb({r,l});
        og.pb({l,r});
    }
    sort(vec.begin(),vec.end());
    map<int,vector<int>> mp;
    map<pair<int,int>,int> ans;
    int idx=0;
    for(int i=0;i<n;i++){
        vector<int> v=mp[a[i]];
        if(v.size()==0)mp[a[i]].pb(i);
        else if(v.size()==1){
            update(v[0],1);
            mp[a[i]].pb(i);
        }
        else if(v.size()==2){
            update(v[0],-1);
            update(v[1],1);
            mp[a[i]].pb(i);
        }
        else{
            update(v[0],0);
            update(v[1],-1);
            update(v[2],1);
            mp[a[i]].clear();
            mp[a[i]].pb(v[1]);
            mp[a[i]].pb(v[2]);
            mp[a[i]].pb(i);
        }
        while(idx!=q && vec[idx].first==i+1){
            ans[{vec[idx].second,vec[idx].first}]=query(1,vec[idx].second-1,vec[idx].first-1,0,offset-1);
            idx++;
        }
    }
    for(int i=0;i<og.size();i++){
        cout<<ans[{og[i].first,og[i].second}]<<endl;
    }
}

Compilation message (stderr)

poklon.cpp: In function 'int main()':
poklon.cpp:69:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |     for(int i=0;i<og.size();i++){
      |                 ~^~~~~~~~~~

• Subtask 1: 84 / 140