Submission #1006168

#	Time	Username	Problem	Language	Result	Execution time	Memory
1006168		m5588ohammed	Data Transfer (IOI19_transfer)	C++17	0 / 100	5 ms	5396 KiB

transfer

#include <bits/stdc++.h>
using namespace std;
int n=255;
vector<int> get_attachment(vector <int> source) {
    int cnt=0,sum=0,k;
    for(int i=0;i<source.size();i++){
        if(source[i]==1){
            sum++;
            cnt^=i;
        }
    }
    vector <int> ans=source;
    k=sum%2;
    while(cnt!=0){
        ans.push_back(cnt%2);
        cnt/=2;
    }
    ans.push_back(k);
    return ans;
}

vector<int> retrieve(vector<int> data) {
    int cnt=0,sum=0,k=data[data.size()-1],num=0;
    int n = (data.size() > 255 ? 255 : 63);
    for(int i=0;i<n;i++){
        if(data[i]==1){
            sum++;
            cnt^=i;
        }
    }
    
    for(int i=n;i<data.size()-1;i++) num+=data[i]*(1<<(i-n));
    if(sum%2!=k&&cnt!=num) data[cnt^num]^=1;
    
    vector <int> ans;
    for(int i=0;i<n;i++) ans.push_back(data[i]);
    
    return ans;

}

Compilation message (stderr)

transfer.cpp: In function 'std::vector<int> get_attachment(std::vector<int>)':
transfer.cpp:6:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |     for(int i=0;i<source.size();i++){
      |                 ~^~~~~~~~~~~~~~
transfer.cpp: In function 'std::vector<int> retrieve(std::vector<int>)':
transfer.cpp:32:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for(int i=n;i<data.size()-1;i++) num+=data[i]*(1<<(i-n));
      |                 ~^~~~~~~~~~~~~~

• Subtask 1: 0 / 60
• Subtask 2: 0 / 40