Submission #539173

#	Time	Username	Problem	Language	Result	Execution time	Memory
539173		astoria	Coins (IOI17_coins)	C++14	100 / 100	11 ms	1552 KiB

coins

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

std::vector<int> coin_flips(std::vector<int> b, int c) {
    std::vector<int> flips;
    int x=0;
    for (int i=0; i<64; i++) x^=(b[i]*i);
    int y = x^c;
    flips.push_back(y);
    return flips;
}

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

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