#include "transfer.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define dbg(x...) cerr << "LINE(" << __LINE__ << ") -> " <<"[" << #x << "] = ["; _print(x)
#else
#define dbg(x...)
#endif
string bin(int x){
string res;
for(int i = 30;i>=0;--i){
if(x&(1ll<<i))res+='1';
else res+='0';
}
while(!res.empty() && res[0]=='0')res.erase(res.begin());
return res;
}
int power(int x){
// is x a power of 2
while((x%2)==0)x/=2;
if(x==1)return 1;
return 0;
}
std::vector<int> get_attachment(std::vector<int> source) {
int v = 3;
int x = 0;
for(int i = 0;i<source.size();++i){
while(power(v))v++;
if(source[i])x^=v;
v++;
}
string s= bin(x);
vector<int>ret;
for(auto w : s)ret.pb(w-'0');
return ret;
}
/*
1
1 110101100
*/
std::vector<int> retrieve(std::vector<int> data) {
int N = 63;
if(data.size()>100)N = 255;
int bits = data.size()-N;
vector<int>ret;
int v = 3, X = 0, Y = 0;
for(int i = 0;i<N;++i){
while(power(v))v++;
if(data[i])X^=v;
v++;
}
int pos = 0;
for(int i = data.size()-1;i>=N;--i){
if(data[i])Y+=(1ll<<pos);
pos++;
}
if(X==Y){
for(int i = 0;i<N;++i)ret.pb(data[i]);
return ret;
}
for(int i = 0;i<N;++i){
int nsum = 0;
data[i] = 1-data[i];
v = 3;
for(int j = 0;j<N;++j){
while(power(v))v++;
if(data[j])nsum^=v;
v++;
}
data[i] = 1-data[i];
if(nsum==Y){
for(int j = 0;j<i;++j)ret.pb(data[j]);
ret.pb((data[i]?0:1));
for(int j = i+1;j<N;++j)ret.pb(data[j]);
return ret;
}
v++;
}
for(int i = 0;i<N;++i)ret.pb(data[i]);
return ret;
}
Compilation message
transfer.cpp: In function 'std::vector<int> get_attachment(std::vector<int>)':
transfer.cpp:54:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
54 | for(int i = 0;i<source.size();++i){
| ~^~~~~~~~~~~~~~
transfer.cpp: In function 'std::vector<int> retrieve(std::vector<int>)':
transfer.cpp:72:6: warning: unused variable 'bits' [-Wunused-variable]
72 | int bits = data.size()-N;
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
27 ms |
704 KB |
Output is correct |
| 2 |
Correct |
26 ms |
648 KB |
Output is correct |
| 3 |
Correct |
24 ms |
780 KB |
Output is correct |
| 4 |
Correct |
26 ms |
696 KB |
Output is correct |
| 5 |
Correct |
26 ms |
644 KB |
Output is correct |
| 6 |
Correct |
27 ms |
648 KB |
Output is correct |
| 7 |
Correct |
30 ms |
788 KB |
Output is correct |
| 8 |
Correct |
24 ms |
740 KB |
Output is correct |
| 9 |
Correct |
24 ms |
640 KB |
Output is correct |
| 10 |
Correct |
24 ms |
728 KB |
Output is correct |
| 11 |
Correct |
26 ms |
700 KB |
Output is correct |
| 12 |
Correct |
26 ms |
664 KB |
Output is correct |
| 13 |
Correct |
29 ms |
644 KB |
Output is correct |
| 14 |
Correct |
27 ms |
756 KB |
Output is correct |
| 15 |
Correct |
27 ms |
804 KB |
Output is correct |
| 16 |
Correct |
25 ms |
652 KB |
Output is correct |
| 17 |
Correct |
35 ms |
840 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
3069 ms |
2448 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
