/in/foo.cc: In function 'int main()':
/in/foo.cc:12:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j, k, n, m, t;
            ^
/in/foo.cc:12:15: warning: unused variable 'k' [-Wunused-variable]
     int i, j, k, n, m, t;
               ^
/in/foo.cc:12:21: warning: unused variable 'm' [-Wunused-variable]
     int i, j, k, n, m, t;
                     ^
/in/foo.cc:12:24: warning: unused variable 't' [-Wunused-variable]
     int i, j, k, n, m, t;
                        ^
/in/foo.cc:13:9: warning: unused variable 'coeffs' [-Wunused-variable]
     int coeffs[101];
         ^~~~~~