Submission #1203030

#	Time	Username	Problem	Language	Result	Execution time	Memory
1203030		al95ireyiz	Sum Zero (RMI20_sumzero)	C++20	22 / 100	91 ms	27716 KiB

sumzero

//*** Bismillah ***//
#pragma GCC optimize("O3", "fast-math", "unroll-loops", "no-stack-protector")
#include <bits/stdc++.h>
using namespace std;
#if !defined(ONLINE_JUDGE) and !defined(EVAL)
#include "template/debug.h"
#else
#define d(x...)
#endif
#define fr first
#define sc second
#define ll long long
#define pb push_back
#define pll pair<ll,ll>
#define len(x)(ll)x.size()
#define all(x)x.begin(),x.end()
const ll INF = 1e9;
const ll INFL = 1e18;
const ll MOD = 1e9+7;
// const ll MOD = 998244353;
const ll maxn = 4e5+5;
ll n,m,k=0;
ll a[maxn], up[maxn][30];
map<ll, ll> mp;
void _(ll tt){
    cin>>n;
    ll pr = 0, pos = n + 1;
    for(ll i = 1; i <= n; i ++) cin>>a[i], pr += a[i];
    for(ll i = n; i >= 0; i --){
        if(mp.count(pr)) pos = min(pos, mp[pr]);
        up[i][0] = pos;
        mp[pr] = i;
        pr -= a[i];
    }
    mp.clear();
    up[n+1][0] = n + 1;
    for(ll i = 1; i < 30; i ++){
        for(ll j = 0; j <= n + 1; j ++){
            up[j][i] = up[up[j][i-1]][i-1];
        }
    }
    cin>>m;
    for(ll i = 1, l, r; i <= m; i ++){
        cin>>l>>r;
        l --;
        ll cv = 0;
        for(ll i = 29; i >= 0; i --){
            if(up[l][i] <= r and up[l][i] != 0){
                cv += 1ll << i;
                l = up[l][i];
            }
        }
        cout<<cv<<'\n';
    }
}
signed main(){
    ll tm=clock();
    cin.tie(0)->sync_with_stdio(0);
    ll t=1;
    // cin>>t;
    for(ll tt=1;tt<=t;tt++){
        _(tt);
    }
    cerr<<"\n\033[1;31mTime: \033[1;30m" \
        <<(double)(clock()-tm)/1000000<<"\033[1;32m seconds\n";
}

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