Submission #918556

#	Time	Username	Problem	Language	Result	Execution time	Memory
918556		vjudge1	Coins (IOI17_coins)	C++17	100 / 100	9 ms	1860 KiB

coins

#include<bits/stdc++.h>
#include "coins.h"
#define ll int
using namespace std;
vector<int> coin_flips(vector<int> b, int c) {
    ll x = 0, i, j;
    for(i = 0; i<64; i++){
        if(b[i]){
            x ^= i;
        }
    }
    x ^= c;
    vector<int> flips(1);
    flips[0] = x;
    return flips;
}

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

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:6:18: warning: unused variable 'j' [-Wunused-variable]
    6 |     ll x = 0, i, j;
      |                  ^

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