제출 #1353388

#제출 시각아이디문제언어결과실행 시간메모리
1353388AvianshUiro (JOI25_uiro)C++20
0 / 100
173 ms21048 KiB
#include <bits/stdc++.h>

using namespace std;

const int lg = 4;
const int mxn = 2e5+5;

struct sparseTable{
    int spar[mxn][lg];
    sparseTable(){

    }
    void build(int n, int arr[]){
        for(int i = 0;i<n;i++){
            fill(spar[i],spar[i]+lg,1e9);
            spar[i][0]=arr[i];
        }
        for(int i = n-1;i>=0;i--){
            for(int j = 1;j<lg;j++){
                spar[i][j]=spar[i][j-1];
                int ind = i+(1<<(j-1));
                if(ind<n){
                    spar[i][j]=min(spar[i][j],spar[ind][j-1]);
                }
            }
        }
    }
    int query(int l, int r){
        if(l>r)
            return 1e9;
        int dif = (r-l+1);
        dif = (31-__builtin_clz(dif));
        return min(spar[l][dif],spar[r-(1<<dif)+1][dif]);
    }
};

int mxa = 106;

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    int a[n];
    for(int &i : a){
        cin >> i;
    }
    mxa = *max_element(a,a+n)+2;
    ///precompute EVERYTHING
    int cnt[mxa][n];
    for(int i = 0;i<mxa;i++){
        fill(cnt[i],cnt[i]+n,0);
    }
    int pref[mxa][n];
    vector<sparseTable> segs(mxa);
    for(int j = 0;j<mxa;j++){
        pref[j][0]= (a[0]<=j) ?  -a[0] : a[0];
        cnt[j][0]=(a[0]==j);
        for(int i = 1;i<n;i++){
            pref[j][i]=pref[j][i-1]+(a[i]<=j ? -a[i] : a[i]);
            cnt[j][i]=cnt[j][i-1]+(a[i]==j);
        }
        segs[j].build(n,pref[j]);
    }
    int q;
    cin >> q;
    while(q--){
        int l,r;
        cin >> l >> r;
        l--;r--;
        int ol = l;
        int ans = 0;
        int sum = 0;
        for(int i = 1;i<mxa;i++){
            ///find greatest index for p
            int lo = l;
            int hi = r;
            while(lo<hi){
                ///all ind > mid have i as -ve.
                int mid = (lo+hi)/2;
                ///check
                int lefsum = pref[i-1][mid] - (ol ? pref[i-1][ol-1] : 0);
                lefsum+=sum;
                if(segs[i].query(mid+1,r)-segs[i].query(mid,mid)+lefsum>=0){
                    hi=mid;
                }
                else{
                    lo=mid+1;
                }
            }
            l=lo;
            ///cnt i till l use to add to sum.
            sum+=2*i*(cnt[i][l]-(ol ? cnt[i][ol-1] : 0));
            ///find i from l to r use to add to ans.
            ans+=cnt[i][r]-cnt[i][l];
        }
        cout << ans << "\n";
    }
    return 0;
}
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...