Submission #646152

#	Time	Username	Problem	Language	Result	Execution time	Memory
646152		borgar02	Sum Zero (RMI20_sumzero)	C++17	61 / 100	499 ms	46752 KiB

sumzero

#include <bits/stdc++.h>

using namespace std;
unsigned seed = chrono :: system_clock :: now().time_since_epoch().count();
mt19937 rng(seed);
using ll = long long;
const int N = 4e5 + 5;
ll c[N];
int dp[N][19];

int main()
{
    ios_base :: sync_with_stdio(false); cin.tie(0);
    int n, q;
    cin >> n;
    for(int i = 1; i <= n; i++)
        cin >> c[i];
    partial_sum(c + 1, c + n + 1, c + 1);
    map <ll, int> m;
    dp[n + 1][0] = n + 1;
    for(int i = n; i >= 0; i--) {
        dp[i][0] = (m.count(c[i]) ? min(m[c[i]], dp[i + 1][0]) : dp[i + 1][0]);
        m[c[i]] = i;
    }
    for(int j = 1; j < 19; j++) {
        dp[n + 1][j] = n + 1;
        for(int i = n; i >= 0; i--)
            dp[i][j] = dp[dp[i][j - 1]][j - 1];
    }
    cin >> q;
    for(int i = 1, l, r; i <= q; i++) {
        cin >> l >> r; l--;
        int res = 0;
        for(int j = 18; j >= 0; j--)
            if(dp[l][j] <= r)
                res |= (1 << j),
                l = dp[l][j];
        cout << res << "\n";
    }
    return 0;
}

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