Submission #924220

#	Time	Username	Problem	Language	Result	Execution time	Memory
924220		Camillus	Brperm (RMI20_brperm)	C++17	0 / 100	86 ms	2260 KiB

brperm

#define debug(...) 42
#include "bits/stdc++.h"
using namespace std;

#ifndef LOCAL
#include "brperm.h"
#else
void init(int n, const char s[]);
int query(int i, int k);
#endif

int n;
string s;

void init(int N, const char S[]) {
    s = string(S, S + N);
}

int swapped(int i, int k) {
    int a = 1;
    int b = 1 << (k - 1);

    if (bool(i & a) == bool(i & b)) {
        return i;
    } else {
        i ^= a;
        i ^= b;
        return i;
    }
}

int query(int i, int k) {
    if (i + (1 << k) > n) {
        return false;
    }
    string t(s.begin() + i, s.begin() + i + (1 << k));
    for (int j = 0; j < (1 << k); j++) {
        if (t[j] != t[swapped(j, k)]) {
            return false;
        }
    }
    return true;
}

#ifdef LOCAL
char __s[(int)5e5 + 10] = {};

int main() {
    cin >> __s;
    init(strlen(__s), __s);

    int __x, __y;
    while (cin >> __x >> __y)
        cout << query(__x, __y) << '\n';

    return 0;
}
#endif

• Subtask 1: 0 / 13
• Subtask 2: 0 / 37
• Subtask 3: 0 / 17
• Subtask 4: 0 / 33