oj.uz

Submission #829879

# Submission time Handle Problem Language Result Execution time Memory
829879 2023-08-18T15:33:29 Z Essa2006 Data Transfer (IOI19_transfer) C++14
100 / 100
 239 ms 2492 KB 
#include "transfer.h"
#include<bits/stdc++.h>

using namespace std;

vector<int> get_attachment(vector<int> source) {
    vector<int>Ans;
	for(int j=0;j<=9;j++){
        int cur=(1<<j);
        int res=0;
        bool cont=0;
        for(int i=0;i<source.size();i++){
            if((i+1)&cur){
                cont=1;
                res^=source[i];
            }
        }
        if(!cont)
            continue;
        Ans.push_back(res);
	}
	int res=0;
	for(int i=0;i<Ans.size();i++){
        res^=Ans[i];
	}
	Ans.push_back(res);
	return Ans;
}

vector<int> retrieve(vector<int> data) {
	int ind=0;
	int n=63;
	if(data.size()>200){
        n=255;
	}
	vector<int>Cur(n);
	for(int j=0;j<=9;j++){
        int cur=(1<<j);
        int res=0;
        bool cont=0;
        for(int i=0;i<n;i++){
            if((i+1)&cur){
                cont=1;
                res^=data[i];
            }
        }
        if(!cont)
            continue;
        Cur.push_back(res);
	}
	int res=0;
	for(int i=n;i<data.size()-1;i++){
        res^=data[i];
        if(Cur[i]!=data[i]){
            ind+=(1<<(i-n));
        }
	}
	vector<int>Ans;
	for(int i=0;i<n;i++){
        Ans.push_back(data[i]);
	}
	if(ind && res!=data.back()){
        ind=0;
	}
	if(ind){
        Ans[ind-1]=!Ans[ind-1];
	}
	if(Ans.size()!=n)
        n/=0;
	return Ans;
}


//static inline string run_scenario() {
//	int c;
//	cin >> c;
//	if (c < -1)
//		return "invalid corruption index";
//	string source_str;
//	cin >> source_str;
//	const int N = source_str.size();
//	const int max_attachment_size = 2*N;
//	vector<int> source;
//	for (int i=0; i<N; i++)
//		source.push_back(source_str[i]-'0');
//
//	vector<int> attachment = get_attachment(source);
//	if (int(attachment.size()) > max_attachment_size)
//		return "attachment too large";
//	for (int x : attachment)
//		if (x != 0 && x != 1)
//			return "invalid attachment integer value";
//
//	vector<int> data(source);
//	data.insert(data.end(), attachment.begin(), attachment.end());
//
//	if (c >= int(data.size()))
//		return "invalid corruption index";
//
//	if (c >= 0)
//		data[c] = 1-data[c];
//
//	vector<int> result_source = retrieve(data);
//
//	if (source != result_source)
//		return "wrong source retrieval";
//
//	return string("OK K=")+to_string(attachment.size());
//}
//
//int main() {
//	int T;
//	cin >> T;
//	for (int scenario = 0; scenario < T; scenario++) {
//		string result = run_scenario();
//		cout << "scenario #" << scenario << ": " << result << endl;
//	}
//	return 0;
//}

Compilation message

transfer.cpp: In function 'std::vector<int> get_attachment(std::vector<int>)':
transfer.cpp:12:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |         for(int i=0;i<source.size();i++){
      |                     ~^~~~~~~~~~~~~~
transfer.cpp:23:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for(int i=0;i<Ans.size();i++){
      |              ~^~~~~~~~~~~
transfer.cpp: In function 'std::vector<int> retrieve(std::vector<int>)':
transfer.cpp:52:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |  for(int i=n;i<data.size()-1;i++){
      |              ~^~~~~~~~~~~~~~
transfer.cpp:68:15: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   68 |  if(Ans.size()!=n)
      |     ~~~~~~~~~~^~~
transfer.cpp:69:10: warning: division by zero [-Wdiv-by-zero]
   69 |         n/=0;
      |         ~^~~

Subtask #1
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 648 KB Output is correct
2 Correct 5 ms 652 KB Output is correct
3 Correct 4 ms 788 KB Output is correct
4 Correct 5 ms 732 KB Output is correct
5 Correct 5 ms 812 KB Output is correct
6 Correct 5 ms 652 KB Output is correct
7 Correct 5 ms 644 KB Output is correct
8 Correct 7 ms 736 KB Output is correct
9 Correct 5 ms 652 KB Output is correct
10 Correct 5 ms 732 KB Output is correct
11 Correct 5 ms 652 KB Output is correct
12 Correct 5 ms 812 KB Output is correct
13 Correct 5 ms 644 KB Output is correct
14 Correct 5 ms 648 KB Output is correct
15 Correct 5 ms 644 KB Output is correct
16 Correct 5 ms 648 KB Output is correct
17 Correct 5 ms 644 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 190 ms 2492 KB Output is correct
2 Correct 193 ms 2492 KB Output is correct
3 Correct 193 ms 2492 KB Output is correct
4 Correct 190 ms 2484 KB Output is correct
5 Correct 198 ms 2464 KB Output is correct
6 Correct 239 ms 2492 KB Output is correct
7 Correct 189 ms 2484 KB Output is correct
8 Correct 189 ms 2492 KB Output is correct
9 Correct 194 ms 2484 KB Output is correct
10 Correct 189 ms 2488 KB Output is correct
11 Correct 222 ms 2484 KB Output is correct
12 Correct 195 ms 2484 KB Output is correct
13 Correct 190 ms 2484 KB Output is correct
14 Correct 209 ms 2492 KB Output is correct
15 Correct 191 ms 2484 KB Output is correct
16 Correct 190 ms 2492 KB Output is correct
17 Correct 194 ms 2488 KB Output is correct
18 Correct 189 ms 2484 KB Output is correct
19 Correct 196 ms 2484 KB Output is correct