Submission #1235456

#	Time	Username	Problem	Language	Result	Execution time	Memory
1235456		santi3223	Coins (IOI17_coins)	C++20	Compilation error	0 ms	0 KiB

coins

#include <bits/stdc++.h>
#include "coins.h"
using namespace std;
#define ll int
#define vb vector<bool>
#define pb push_back
#define ff(aa, bb, cc) for(ll aa = bb; aa < cc; aa++)
#define vl vector<ll>
#define pll pair<ll, ll>
#define fi first
#define se second
#define ed "\n"
#define all(aaa) aaa.begin(), aaa.end()
#define rall(aaa) aaa.rbegin(), aaa.rend()
ll MOD = 1e9+7;

std::vector<int> coin_flips(std::vector<int> b, int c) {
  vl ref;
	ll x = c;
    while(x > 0){
      if(x % 2 == 1){
			  ref.pb(1);
  		}
      else{
  			ref.pb(0);
  		}
      x /= 2;
    }
    while(ref.size() < 6){
  		ref.pb(0);
  	}
    vl fin;
    ff(i, 0, 6){
      if(b[i] != ref[i]){
			  fin.push_back(i);
	    }
    }
    if(fin.empty()){
	  	fin.push_back(63);
	  }
    return fin;
}

int find_coin(std::vector<int> b){
    ll trans = 0, x = 1;
    ff(i, 0, 6){
        trans += (b[i]*x);
        x*=2;
    }
    return trans;
}

static string run_test() {
	int c;
	cin >> c;
	vector<int> b(64);
	for (int i = 0; i < 8; i++) {
		string s;
		cin >> s;
		for (int j = 0; j < 8; j++) {
			b[i * 8 + j] = int(s[j] - '0');
		}
	}
	vector<int> flips = coin_flips(b, c);
	if ((int)flips.size() == 0) {
		return "0 turn overs";
	}
	for (int i = 0; i < (int)flips.size(); i++) {
		if (flips[i] < 0 || flips[i] > 63) {
			return "cell number out of range";
		}
		b[flips[i]] = 1 - b[flips[i]];
	}
	int coin = find_coin(b);
	if (coin != c) {
		return "wrong coin";
	}
	return "ok";
}

int main() {
	int tests;
	cin >> tests;
	for (int t = 1; t <= tests; t++) {
		string result = run_test();
		cout << "test #" << t << ": " << result << endl;
	}
	return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccG8BJbk.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc3XWabZ.o:coins.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status