Submission #711211

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
711211	2023-03-16T10:10:58 Z	Darren0724	Data Transfer (IOI19_transfer)	C++14	Compilation error	0 ms	0 KB

transfer

#include "transfer.h"
#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;
std::vector<int> get_attachment(std::vector<int> source) {
	int n=source.size();

        vector<int> a(7);
        for(int j=0;j<6;j++){
            for(int i=0;i<n;i++){
                if(i&(1<<j)){
                    a[j]^=source[i];
                }
            }
        }
        for(int i=0;i<n;i++){
            a[6]^=source[i];
        }
        return a;

}

std::vector<int> retrieve(std::vector<int> data) {
    vector<int> v=data;
    int n=v.size();

        vector<int> a(6),b(6);
        for(int i=63;i<69;i++){
            a[i-63]=v[i];
            b[i-63]=v[69]^a[i-63];
        }
        vector<int> a1(6),b1(6);
        for(int j=0;j<6;j++){
            for(int i=0;i<63;i++){
                if(i&(1<<j)){
                    a1[j]^=v[i];
                }
                else{
                    b1[j]^=v[i];
                }
            }
        }
        int ans=0;
        int cnt=0;
        for(int j=0;j<6;j++){
            if(a[j]!=a1[j]){
                cnt++;
                ans^=(1<<j);
            }
            if(b[j]!=b1[j]){
                cnt++;
            }
        }
        vector<int> ans1(63);

        for(int i=0;i<63;i++){
            ans1[i]=v[i];
        }
        if(cnt==6){
            ans1[ans]^=1;
        }

        return ans1;

}

Compilation message

transfer.cpp: In function 'std::vector<int> retrieve(std::vector<int>)':
transfer.cpp:25:9: warning: unused variable 'n' [-Wunused-variable]
   25 |     int n=v.size();
      |         ^
/usr/bin/ld: /tmp/ccaPdLaw.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cccqVBuy.o:transfer.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status