Submission #829560

#	Time	Username	Problem	Language	Result	Execution time	Memory
829560		birthdaycake	Coins (IOI17_coins)	C++17	100 / 100	8 ms	1376 KiB

coins

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



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

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

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:10:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for(int i = 0; i < b.size(); i++){
      |                    ~~^~~~~~~~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:19:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     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