View Compilation Error

0_0_18885570_3960.cpp:31:25: error: redefinition of 'int n'
 int n,m,bin[30]={1};int n,i,j,flag;std::bitset<505>v,f[62];char s[2000010],t[99];
                         ^
0_0_18885570_3960.cpp:31:5: note: 'int n' previously declared here
 int n,m,bin[30]={1};int n,i,j,flag;std::bitset<505>v,f[62];char s[2000010],t[99];
     ^