Submission #918561

#	Time	Username	Problem	Language	Result	Execution time	Memory
918561		vjudge1	Coins (IOI17_coins)	C++17	100 / 100	8 ms	1616 KiB

coins

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

#define db long double
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pii>
#define vll vector<pll>
// #define endl '\n'
#define all(x) x.begin(), x.end()
#define fastio\
    ios_base::sync_with_stdio(0);\
    cin.tie(0);\
    cout.tie(0)\

vector<int> coin_flips(std::vector<int> b, int c) {
    std::vector<int> flips(1);
    unsigned ll xr = c;
    for(int i = 0; i < 64; i++){
        xr ^= i * b[i];
    }
    flips[0] = xr;
    return flips;
}

int find_coin(std::vector<int> b) {
    unsigned ll xr = 0;
    for(int i = 0; i < 64; i++){
        xr ^= i * b[i];
    }
    return xr;
}

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