Submission #1013668

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013668		NintsiChkhaidze	Coins (IOI17_coins)	C++17	100 / 100	9 ms	1820 KiB

coins

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

vector<int> coin_flips(vector<int> b, int c) {
    vector<int> flips(1);
    int xr = 0;
    for (int i = 0; i < 64; i++){
    	if (b[i]) xr ^= i;
	}
	
	for (int i = 0; i < 64; i++){
		int newxor = xr ^ i;
		if (newxor == c) {
			flips[0] = i;
			return flips;
		}
	}
	
    return flips;
}

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

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