Submission #829568

#	Time	Username	Problem	Language	Result	Execution time	Memory
829568		vqpahmad	Coins (IOI17_coins)	C++14	100 / 100	11 ms	1552 KiB

coins

#include "coins.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define F first
#define S second
#define endl '\n'
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
const int mod = 1e9 + 7;
const int N = 1e6 + 15;
const ll inf = 1e18;

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

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

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