oj.uz

Submission #711221

# Submission time Handle Problem Language Result Execution time Memory
711221 2023-03-16T10:22:15 Z Darren0724 Data Transfer (IOI19_transfer) C++17
60 / 100
 7 ms 2492 KB 
#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();
	if(n==63){
        vector<int> a(7),b(7);
        for(int j=0;j<6;j++){
            for(int i=0;i<n;i++){
                if(i&(1<<j)){
                    b[j]^=source[i];
                }
                else{
                    a[j]^=source[i];
                }
            }
        }
        for(int i=0;i<n;i++){
            a[6]^=source[i];
        }
        return a;
	}
	else{
        vector<int> a(9),b(9);
        for(int j=0;j<8;j++){
            for(int i=0;i<n;i++){
                if(i&(1<<j)){
                    b[j]^=source[i];
                }
                else{
                    a[j]^=source[i];
                }
            }
        }
        for(int i=0;i<n;i++){
            a[9]^=source[i];
        }
        return a;
	}
}

std::vector<int> retrieve(std::vector<int> data) {
    vector<int> v=data;
    int n=v.size();
    if(n==70){
        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)){
                    b1[j]^=v[i];
                }
                else{
                    a1[j]^=v[i];
                }
            }
        }
        int ans=0;
        int cnt=0;
        for(int j=0;j<6;j++){
            if(a[j]!=a1[j]){
                cnt++;
            }
            if(b[j]!=b1[j]){
                cnt++;
                ans^=(1<<j);
            }
        }
        vector<int> ans1(63);
        //cout<<cnt<<' '<<ans<<endl;
        for(int i=0;i<63;i++){
            ans1[i]=v[i];
        }

        if(cnt==6&&ans!=63){
            ans1[ans]^=1;
        }
        return ans1;
    }
    else{
        vector<int> a(8),b(8);
        for(int i=255;i<263;i++){
            a[i-255]=v[i];
            b[i-255]=v[263]^a[i-255];
        }
        vector<int> a1(8),b1(8);
        for(int j=0;j<8;j++){
            for(int i=0;i<255;i++){
                if(i&(1<<j)){
                    b1[j]^=v[i];
                }
                else{
                    a1[j]^=v[i];
                }
            }
        }
        int ans=0;
        int cnt=0;
        for(int j=0;j<8;j++){
            if(a[j]!=a1[j]){
                cnt++;
            }
            if(b[j]!=b1[j]){
                cnt++;
                ans^=(1<<j);
            }
        }
        vector<int> ans1(255);
        //cout<<cnt<<' '<<ans<<endl;
        for(int i=0;i<255;i++){
            ans1[i]=v[i];
        }

        if(cnt==8&&ans!=255){
            ans1[ans]^=1;
        }
        return ans1;
    }



}

Subtask #1
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 648 KB Output is correct
2 Correct 5 ms 640 KB Output is correct
3 Correct 5 ms 704 KB Output is correct
4 Correct 4 ms 640 KB Output is correct
5 Correct 6 ms 640 KB Output is correct
6 Correct 5 ms 640 KB Output is correct
7 Correct 7 ms 652 KB Output is correct
8 Correct 5 ms 652 KB Output is correct
9 Correct 7 ms 640 KB Output is correct
10 Correct 5 ms 640 KB Output is correct
11 Correct 4 ms 648 KB Output is correct
12 Correct 4 ms 648 KB Output is correct
13 Correct 7 ms 640 KB Output is correct
14 Correct 5 ms 640 KB Output is correct
15 Correct 4 ms 648 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 5 ms 640 KB Output is correct

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 2492 KB WA in grader: wrong source retrieval
2 Halted 0 ms 0 KB -