Submission #956251

#	Time	Username	Problem	Language	Result	Execution time	Memory
956251		MuntherCarrot	Coins (IOI17_coins)	C++14	100 / 100	9 ms	1700 KiB

coins

#include <bits/stdc++.h>
#include "coins.h"

using namespace std;

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

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

// by me

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