View Compilation Error

0_0_16393783_13197.cpp: In function 'int main(int, char**)':
0_0_16393783_13197.cpp:4:13: error: redeclaration of 'int n'
     int n,s,n;
             ^
0_0_16393783_13197.cpp:4:9: note: 'int n' previously declared here
     int n,s,n;
         ^