Submission #124731

#	Time	Username	Problem	Language	Result	Execution time	Memory
124731		mraron	Coins (IOI17_coins)	C++14	100 / 100	13 ms	1508 KiB

coins

#include "coins.h"
using namespace std;


vector<int> coin_flips(vector<int> b, int c) {
    vector<int> res(1);
    int sum=0;
    for(int i=0;i<(int)b.size();++i) {
		sum^=i*b[i];
	}
	res[0]=sum^c;
    return res;
}

int find_coin(vector<int> b) {
	int sum=0;
    for(int i=0;i<(int)b.size();++i) {
		sum^=b[i]*i;
	}
	return sum;
}

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