Submission #851561

#	Time	Username	Problem	Language	Result	Execution time	Memory
851561		heeheeheehaaw	Sum Zero (RMI20_sumzero)	C++17	100 / 100	692 ms	20472 KiB

sumzero

#include<bits/stdc++.h>

using namespace std;

int n;
const int baza = 80, lg = 3;
int v[400005], bl[400005][3];
long long vals[400005];
int mp[400005];

int query(int u, int v)
{
    int rez = 0, put = 80 * 80;
    for(int j = 2; j >= 0; j--)
    {
        for(int i = 1; i <= 79; i++)
            if(bl[u][j] <= v)
            {
                u = bl[u][j];
                rez += put;
            }
        put /= 80;
    }

    return rez;
}
int norma(long long x)
{
    return (lower_bound(vals,vals+1+n,x) - vals);
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    int q;
    cin>>n;
    for(int i = 1; i <= n; i++)
        cin>>v[i];
    long long mindr = n + 1, sum = 0;
    for(int i = n; i >= 1; i--)
    {
        sum += v[i];
        vals[i]=sum;
    }
    sort(vals,vals+1+n);
    sum=0;
    mp[norma(0)] = n + 1;
    for(int i = n; i >= 1; i--)
    {
        sum += v[i];
        bl[i][0] = mindr;
        if(mp[norma(sum)] != 0)
            mindr = min(mindr, mp[norma(sum)] - 1LL);
        mp[norma(sum)] = i;
        //cout<<i<<" "<<mindr<<'\n';
    }

    bl[0][0] = mindr;

    for(int j = 1; j < 3; j++)
        for(int i = 0; i <= n; i++)
        {
            int nod = i;
            for(int k = 1; k <= 80 && nod != n + 1; k++)
                nod = bl[nod][j - 1];
            bl[i][j] = nod;
        }

    cin>>q;
    for(int i = 1; i <= q; i++)
    {
        int a, b;
        cin>>a>>b;
        cout<<query(a - 1, b)<<'\n';
    }

    return 0;
}

• Subtask 1: 22 / 22
• Subtask 2: 39 / 39
• Subtask 3: 39 / 39