/in/foo.cc: In function 'int SSSP(int, int, int)':
/in/foo.cc:23:15: warning: unused variable 'i' [-Wunused-variable]
     int u, v, i, j, k, d, arg;
               ^
/in/foo.cc:23:18: warning: unused variable 'j' [-Wunused-variable]
     int u, v, i, j, k, d, arg;
                  ^
/in/foo.cc:23:21: warning: unused variable 'k' [-Wunused-variable]
     int u, v, i, j, k, d, arg;
                     ^
/in/foo.cc:23:27: warning: unused variable 'arg' [-Wunused-variable]
     int u, v, i, j, k, d, arg;
                           ^~~
/in/foo.cc: In function 'void Run()':
/in/foo.cc:50:18: warning: unused variable 'k' [-Wunused-variable]
     int n, i, j, k, u, v, tmp, d;
                  ^