Submission #1322019

#	Time	Username	Problem	Language	Result	Execution time	Memory
1322019		khoianh	Coins (IOI17_coins)	C++20	100 / 100	5 ms	748 KiB

coins

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

vector<int> coin_flips(vector<int> b, int c){
	ll t = 0;
	for(int i = 0; i < 64; ++i) t ^= (i * b[i]);
	t ^= c;
	return {t};
}

int find_coin(vector<int> b){
	ll t = 0;
	for(int i = 0; i < 64; ++i) t ^= (i * b[i]);
	return t;
}

//int main(){
//	ios_base::sync_with_stdio(false);
//	cin.tie(NULL);
//	if(fopen(".INP", "r")) {
//		freopen(".INP", "r", stdin);
//		freopen(".OUT", "w", stdout);
//	}
//	int testCase = 1;
//	//cin >> testCase;
//	while(testCase--) solve();
//}

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:9:17: warning: narrowing conversion of 't' from 'll' {aka 'long long int'} to 'int' [-Wnarrowing]
    9 |         return {t};
      |                 ^
coins.cpp:9:17: warning: narrowing conversion of 't' from 'll' {aka 'long long int'} to 'int' [-Wnarrowing]
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: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 15 / 15
• Subtask 5: 50 / 50