Submission #1186897

#	Time	Username	Problem	Language	Result	Execution time	Memory
1186897		comxdddddd	Coins (IOI17_coins)	C++20	100 / 100	5 ms	584 KiB

coins

#include "coins.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> coin_flips(vector<int> b, int c) {
    int temp = 0;
    for (int i=0; i<(int)b.size(); i++)
        temp ^= i * b[i];
    vector<int> ans(1, c ^ temp);
    return ans;
}

int find_coin(vector<int> b) {
    int ans = 0;
    for (int i=0; i<(int)b.size(); i++)
        ans ^= i * b[i];
    return ans;
}

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