Submission #1006169

#	Time	Username	Problem	Language	Result	Execution time	Memory
1006169		Abdullah_Alodaibi	Coins (IOI17_coins)	C++17	0 / 100	5 ms	1364 KiB

coins

#include <coins.h>
using namespace std;
using ll = long long;
vector<int> coin_flips(vector<int> b, int c){
    int x=0;
    for(int i=0;i<b.size();i++){
        x^=b[i]*i;
        x%=b.size();
    }
    b[x^c]=(b[x^c]+1)%2;
    return b;
}
int find_coin(vector<int> b){
    int x=0;
    for(int i=0;i<b.size();i++){
        x^=b[i]*i;
        x%=b.size();
    }
    return x;
}

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:6:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |     for(int i=0;i<b.size();i++){
      |                 ~^~~~~~~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:15:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for(int i=0;i<b.size();i++){
      |                 ~^~~~~~~~~

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