Submission #421406

#	Time	Username	Problem	Language	Result	Execution time	Memory
421406		2qbingxuan	Coins (IOI17_coins)	C++14	100 / 100	13 ms	1540 KiB

coins

#include "coins.h"

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

int find_coin(std::vector<int> b) {
    int res = 0;
  	for (int i = 0; i < 64; i++) if (b[i] == 1) res ^= i;
    return res;
}

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