Cod sursa(job #541707)
Utilizator | Bora marian bora_marian | Data | 25 februarie 2011 13:28:46 |
---|---|---|---|
Problema | Light2 | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Romanian Master in Mathematics and Sciences 2011, Ziua 1 | Marime | 0.43 kb |
# include <fstream>
# include <fstream>
# include <bitset>
using namespace std;
long long sol;
bitset<100000000>v;
int main()
{
int n, k, a[30];
ifstream fin ("light2.in");
ofstream fout("light2.out");
fin>>n>>k;
for(int i=1;i<=k;++i)
fin>>a[i];
for(int i=1;i<=k;++i)
for(int j=a[i];j<=n;j+=a[i])
if (v[j]==0)
++sol, v[j]=1;
else
--sol, v[j]=0;
fout<<sol;
return 0;
}