Submission #1141518

#	Time	Username	Problem	Language	Result	Execution time	Memory
1141518		hyl_kibou	Coins (IOI17_coins)	C++17	100 / 100	9 ms	584 KiB

coins

#include "coins.h"

std::vector<int> coin_flips(std::vector<int> b, int c) {
    std::vector<int> flips;

    long long sum = 0;

    for(int i = 0; i<64; ++i){
        if(b[i]){
            sum = sum^i;
        }
    }
    if(sum == c){
        flips.push_back(0);
        return flips;
    }

    for(int i = 0; i<64; ++i){
        if((sum^i)==c){
            flips.push_back(i);
            break;
        }
    }

    return flips;
}

int find_coin(std::vector<int> b) {
    int sum = 0;

    for(int i = 0; i<64; ++i){
        if(b[i]){
            sum=sum^i;
        }
    }

    return sum;

}

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