Submission #720096

#	Time	Username	Problem	Language	Result	Execution time	Memory
720096		ifateen	Secret (JOI14_secret)	C++14	0 / 100	423 ms	4468 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
using namespace std;

struct SparseTable {
    int N, LOG;
    vector<vector<int>> table;
    void init(vector<int> &v) {
        N = v.size();
        LOG = __builtin_clz(1) - __builtin_clz(N);
        table.resize(LOG + 1);
        table[0] = v;
        for (int i = 1; i <= LOG; i++) {
            table[i].resize(N - (1 << i) + 1);
            for (int j = 0; j + (1 << i) <= N; j++) {
                table[i][j] = Secret(table[i - 1][j], table[i - 1][j + (1 << (i - 1))]);
            }
        }
    }
    int query(int L, int R) {
        int LOG2 = __builtin_clz(1) - __builtin_clz(R - L + 1);
        return Secret(table[LOG2][L], table[LOG2][R - (1 << LOG2) + 1]);
    }
};

SparseTable s;

void Init(int N, int A[]) {
    vector<int> v(N);
    int cnt = 0;
    for (auto &i : v) i = A[cnt++];
    s.init(v);
}

int Query(int L, int R) {
    return s.query(L, R);
}

int Secret(int X, int Y);

• Subtask 1: 0 / 100