Submission #474456

#	Time	Username	Problem	Language	Result	Execution time	Memory
474456		Carmel_Ab1	Coins (IOI17_coins)	C++17	100 / 100	13 ms	1532 KiB

coins

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

//#include "grader.cpp"
vi coin_flips(vi b, int c) {
    int x=0;
    for(int i=0; i<64; i++)
        x^=(i*b[i]);
    return vi(1,c^x);
}

int find_coin(vi b) {
    int ans=0;
    for(int i=0; i<64; i++)
        ans^=(b[i]*i);
    return ans;
}

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