Submission #1219248

#	Time	Username	Problem	Language	Result	Execution time	Memory
1219248		NintsiChkhaidze	Coins (IOI17_coins)	C++17	100 / 100	8 ms	772 KiB

coins

#include "coins.h"
using namespace std;
// #define int long long
// #define ff first
// #define ss second
// #define pb push_back
int t;
const int N = 1e6 + 6;

std::vector<int> coin_flips(std::vector<int> b, int c) {
    std::vector<int> flips;
    
    int num = 0;
    for (int i = 0; i <= 63; i++){
        num ^= (b[i] * i);
    }
    
    for (int i = 0; i <= 63; i++){
        if ((num ^ i) == c){
            flips.push_back(i);
            break;
        }
    }
    
    return flips;
}

int find_coin(std::vector<int> b) {
    int num = 0;
    for (int i = 0; i <= 63; i++){
        num ^= (b[i] * i);
    }
    return num;
}

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