oj.uz

Submission #857257

# Submission time Handle Problem Language Result Execution time Memory
857257 2023-10-05T16:53:32 Z divad Brperm (RMI20_brperm) C++14
0 / 100
 3000 ms 2240 KB 
#include <bits/stdc++.h>
#include "brperm.h"
using namespace std;
string str;

void init(int n, const char s[]) {
  str = s;
}

int rev_bits(int x, int k){
    int ans = 0;
    for(int i = 0; i < k; i++){
        int bt = (x>>i)&1;
        ans += bt*(1<<(k-i-1));
    }
    return ans;
}

int query(int i, int k){
    int len = (1<<k);
    if(i+len >= str.size()){
        return 0;
    }
    string sub = str.substr(i, len);
    for(int i = 0; i < len; i++){
        if(sub[i] != sub[rev_bits(i, k)]){
            return false;
        }
    }
    return true;
}

Compilation message

brperm.cpp: In function 'int query(int, int)':
brperm.cpp:21:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     if(i+len >= str.size()){
      |        ~~~~~~^~~~~~~~~~~~~

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 37.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3043 ms 2240 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -