Submission #580828

#	Time	Username	Problem	Language	Result	Execution time	Memory
580828		HeyYouNotYouYou	Coins (IOI17_coins)	C++14	Compilation error	0 ms	0 KiB

coins

#include "coins.h"
#include "grader.cpp"
#include<bits/stdc++.h>
using namespace std;
vector<int> coin_flips(std::vector<int> b, int c) {
    for(int i = 0 ; i < b.size() ; i++) if(b[i]) c^=i;
    return {c};
}

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

}

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:6:23: 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++) if(b[i]) c^=i;
      |                     ~~^~~~~~~~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:12:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(int i = 0 ; i < b.size() ; i++) if(b[i]) ans^=i;
      |                     ~~^~~~~~~~~~
/usr/bin/ld: /tmp/ccFPBshz.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccnGuYBA.o:coins.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status