Submission #998416

#	Time	Username	Problem	Language	Result	Execution time	Memory
998416		hyakup	Coins (IOI17_coins)	C++17	100 / 100	9 ms	1940 KiB

coins

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


vector<int> coin_flips(vector<int> b, int c) {
    int x = 0;
    for( int i = 0; i < b.size(); i++ ) if( b[i] ) x ^= i;
    vector<int> resp;
    resp.push_back(c^x);
    return resp;
}

int find_coin(vector<int> b) {
    int x = 0;
    for( int i = 0; i < b.size(); 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:8:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for( int i = 0; i < b.size(); i++ ) if( b[i] ) x ^= i;
      |                     ~~^~~~~~~~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for( int i = 0; i < b.size(); i++ ) if( b[i] ) x ^= i;
      |                     ~~^~~~~~~~~~

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