Submission #117709

#	Time	Username	Problem	Language	Result	Execution time	Memory
117709		nvmdava	Coins (IOI17_coins)	C++17	100 / 100	13 ms	1712 KiB

coins

#include "coins.h"
#include <bits/stdc++.h>
std::vector<int> coin_flips(std::vector<int> b, int c) {
   int res  = 0;
    for(int i = 0; i < 64; i++) res ^= b[i] * i;
    return {res ^ c};
}

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

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