Submission #401528

#	Time	Username	Problem	Language	Result	Execution time	Memory
401528		NintsiChkhaidze	Poklon (COCI17_poklon)	C++14	140 / 140	1862 ms	15076 KiB

poklon

#include <bits/stdc++.h>
#define pb push_back
#define s second
#define f first
using namespace std;
const int Bl = 707,N = 500005;
pair<pair<int,int>,int> d[N];
pair<int,int> b[N];
int ans[N],res,a[N],cnt[N];
bool cmp(pair<pair<int,int>,int> a,pair<pair<int,int>,int> b){
    if (a.f.f/Bl == b.f.f/Bl) return a.f.s < b.f.s;
    return a.f.f/Bl < b.f.f/Bl;
}
void add(int ind){
    if (cnt[a[ind]] == 2) res--;
    cnt[a[ind]]++;
    if(cnt[a[ind]] == 2) res++;
}
void remove(int ind){
    if (cnt[a[ind]] == 2) res--;
    cnt[a[ind]]--;
    if(cnt[a[ind]] == 2) res++;
}
main (){
    ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);
    int n,m;
    cin>>n>>m;
    
    for (int i=1;i<=n;i++){
        cin>>b[i].f,b[i].s = i;
    }
    sort(b+1,b+n+1);
    a[b[1].s] = 1;
    for(int i =2;i<=n;i++){
        a[b[i].s] = a[b[i - 1].s];
        if (b[i].f > b[i - 1].f) a[b[i].s]++;
    }
    
    for (int i=1;i<=m;i++){
        int l,r;
        cin>>l>>r;
        d[i] = {{l,r},i};
    }
    
    sort(d+1,d+m+1,cmp);
    
    int L = 0,R = -1;
    for (int i=1;i<=m;i++){
        int l = d[i].f.f,r = d[i].f.s,idx = d[i].s;
        while (L > l) add(--L);
        while (R < r) add(++R);
        while (L < l) remove(L++);
        while (R > r) remove(R--);
        ans[idx] = res;
    }
    
    for (int i=1;i<=m;i++)
        cout<<ans[i]<<"\n";
}

Compilation message (stderr)

poklon.cpp:24:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   24 | main (){
      |       ^

• Subtask 1: 140 / 140