Submission #1316282

#	Time	Username	Problem	Language	Result	Execution time	Memory
1316282		aaaaaaaa	Coins (IOI17_coins)	C++20	0 / 100	5 ms	568 KiB

coins

#include "coins.h"
#include <bits/stdc++.h>
using namespace std;


std::vector<int> coin_flips(std::vector<int> b, int c) {
    int x = 0;
    for(int i = 0; i < (int) b.size(); ++i){
        x ^= b[i] * i;
    }
    b[x ^ c] ^= 1;
    return b;
}

int find_coin(std::vector<int> b) {
    int ans = 0;
    for(int j = 0; j < (int) b.size(); ++j){
        ans ^= b[j] * j;
    }
    return ans;
}

Compilation message (stderr)

grader.cpp: In function 'void shuffle(std::vector<int>&)':
grader.cpp:88:23: warning: 'void std::random_shuffle(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<int*, vector<int> >]' is deprecated: use 'std::shuffle' instead [-Wdeprecated-declarations]
   88 |         random_shuffle(v.begin(), v.end());
      |         ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/13/algorithm:61,
                 from grader.cpp:5:
/usr/include/c++/13/bits/stl_algo.h:4581:5: note: declared here
 4581 |     random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last)
      |     ^~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 15
• Subtask 5: 0 / 50