Submission #144895

#	Time	Username	Problem	Language	Result	Execution time	Memory
144895		socho	Coins (IOI17_coins)	C++14	100 / 100	13 ms	1772 KiB

coins

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

std::vector<int> coin_flips(std::vector<int> b, int c) {
    int a = 0;
    for (int i=0; i<b.size(); i++) {
        if (b[i] == 1) {
            a = a ^ i;
        }
    }
    vector<int> L;
    L.push_back(a ^ c);
    return L;
}

int find_coin(std::vector<int> b) {
    int a = 0;
    for (int i=0; i<b.size(); i++) {
        if (b[i] == 1) {
            a = a ^ i;
        }
    }
    return a;
}

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:7:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0; i<b.size(); i++) {
                   ~^~~~~~~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:19:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0; i<b.size(); i++) {
                   ~^~~~~~~~~

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