Submission #1006123

#	Time	Username	Problem	Language	Result	Execution time	Memory
1006123		m5588ohammed	Coins (IOI17_coins)	C++14	0 / 100	1 ms	1052 KiB

coins

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

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

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:6:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |     for(int i=0;i<b.size();i++){
      |                 ~^~~~~~~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:17:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for(int i=0;i<b.size();i++) if(b[i]==1) num^=i;
      |                 ~^~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 15
• Subtask 5: 0 / 50