Submission #486340

#	Time	Username	Problem	Language	Result	Execution time	Memory
486340		PiejanVDC	Coins (IOI17_coins)	C++17	100 / 100	9 ms	1528 KiB

coins

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

void print(vector<int>v) {
    for(int i = 0 ; i < 8 ; i++) {
        for(int j = 0 ; j < 8 ; j++) {
            cout << v[8*i+j];
        } cout << "\n";
    }
}

vector<int> coin_flips(vector<int>b, int c) {
    const int n = 64;
    int mask = 0;
    for(int i = 0 ; i < n ; i++) {
        if(b[i]&1) mask^=i;
    }
    int need=0;
    if(mask != c) {
        //cout << mask << " ";
        need = mask^c;
    }
    return {need};
}

int find_coin(vector<int> b) {
    const int n = 64;
    //print(b);
    int mask = 0;
    for(int i = 0 ; i < n ; i++) {
        if(b[i]&1) mask^=i;
    }
    //return mask;
    //cout << " -- " << mask << " ";
    return mask;
}

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