Submission #320366

#	Time	Username	Problem	Language	Result	Execution time	Memory
320366		lifchrs	Coins (IOI17_coins)	C++14	100 / 100	12 ms	1468 KiB

coins

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

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

int find_coin(vector<int> b){
    int ans = 1;
    for(int i = 0; i < 64; i++){
        if(b[i]) ans ^= i;
    }
    return ans^1;
}

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