Submission #456489

#	Time	Username	Problem	Language	Result	Execution time	Memory
456489		AdamGS	Sum Zero (RMI20_sumzero)	C++14	0 / 100	9 ms	588 KiB

sumzero

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=4e5+7;
int nxt[LIM][7], pot[7];
pair<ll,int>T[LIM];
int main() {
        ios_base::sync_with_stdio(0); cin.tie(0);
        pot[0]=1;
        for(int i=1; i<7; ++i) pot[i]=pot[i-1]*5;
        int n;
        cin >> n;
        ll sum=0;
        rep(i, n+1) nxt[i][0]=n+1;
        rep(i, n) {
                ll a;
                cin >> a;
                sum+=a;
                T[i+1]={sum, i+1};
        }
        stable_sort(T, T+n+1);
        rep(i, n) {
                if(T[i].st==T[i+1].st) nxt[T[i].nd][0]=T[i+1].nd;
        }
        for(int i=n-1; i>=0; --i) nxt[i][0]=min(nxt[i][0], nxt[i+1][0]);
        rep(i, 7) nxt[n+1][i]=n+1;
        for(int j=1; j<7; ++j) {
                rep(i, n+1)nxt[i][j]=nxt[nxt[nxt[nxt[nxt[nxt[i][j-1]][j-1]][j-1]][j-1]][j-1]][j-1];
        }
        int q;
        cin >> q;
        while(q--) {
                int l, r;
                cin >> l >> r; --l;
                int ans=0, i=7;
                while(i>=0) {
                        if(nxt[l][i]<=r) {
                                ans+=pot[i];
                                l=nxt[l][i];
                        } else --i;
                }
                cout << ans << '\n';
        }
}

• Subtask 1: 0 / 22
• Subtask 2: 0 / 39
• Subtask 3: 0 / 39