Submission #1217987

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217987		KindaGoodGames	Brperm (RMI20_brperm)	C++20	Compilation error	0 ms	0 KiB

brperm

#include<bits/stdc++.h>

using namespace std;

int rev(int a, int p){
    int r = 0;
    for(int i = 0; i < p; i++){
        int bit = (a & (1<<i)) > 0;
        r += (1<<(p-i-1)) * bit;
    }
    return r;
}

int main(){
    int k;
    cin >> k;
    for(int p = 0; p <= k; p++){
        int n = 1 << p;
    
        vector<int> arr(n);
        iota(arr.begin(),arr.end(),0);
    
        for(int i = 0; i < n; i++){
            cout << rev(arr[i], p) <<  " ";
        }
        cout << endl; 
    }
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cc2YVTl1.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccBIPblH.o:brperm.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cc2YVTl1.o: in function `main':
grader.cpp:(.text.startup+0x78): undefined reference to `init(int, char const*)'
/usr/bin/ld: grader.cpp:(.text.startup+0x89): undefined reference to `query(int, int)'
collect2: error: ld returned 1 exit status