foo.cc: In function 'int main()':
foo.cc:6:11: warning: unused variable 'a' [-Wunused-variable]
     int n,a=0,t=0,y=0,m,v;
           ^
foo.cc:6:23: warning: unused variable 'm' [-Wunused-variable]
     int n,a=0,t=0,y=0,m,v;
                       ^
foo.cc:6:25: warning: unused variable 'v' [-Wunused-variable]
     int n,a=0,t=0,y=0,m,v;
                         ^

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