Submission #578529

#	Time	Username	Problem	Language	Result	Execution time	Memory
578529		zaneyu	Coins (IOI17_coins)	C++14	100 / 100	11 ms	1552 KiB

coins

#include "coins.h"
#define REP(i,n) for(int i=0;i<n;i++)
std::vector<int> coin_flips(std::vector<int> b, int c) {
    REP(i,64){
        if(b[i]) c^=i;
    }
    return {c};
}

int find_coin(std::vector<int> b) {
    int a=0;
    REP(i,64) if(b[i]) a^=i;
    return a;
}

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