Submission #439806

#	Time	Username	Problem	Language	Result	Execution time	Memory
439806		gromperen	Coins (IOI17_coins)	C++14	100 / 100	15 ms	1532 KiB

coins

#include "coins.h"
#include <bits/stdc++.h>

using namespace std;

vector<int> coin_flips(std::vector<int> b, int c) {
    vector<int> flips;
    int n = b.size();

    int x = 0;
    for (int i = 0; i < n; ++i) {
	    x ^= (i * b[i]);
    }
    flips.push_back(c ^ x);

    return flips;
}

int find_coin(std::vector<int> b) {
    int n = b.size();
    int x = 0;
    for (int i = 0; i < n; ++i) {
	    x ^= (i * b[i]);
    }

    return x;
}

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