Compilare: user.cpp:9:1: warning: ‘typedef’ was ignored in this declaration [enabled by default] }; ^ user.cpp: In function ‘int main()’: user.cpp:33:42: warning: unused variable ‘j’ [-Wunused-variable] int N, E, d[50001], i, a, b, c, min, k, j, fare, cost; ^ user.cpp:33:45: warning: unused variable ‘fare’ [-Wunused-variable] int N, E, d[50001], i, a, b, c, min, k, j, fare, cost; ^ user.cpp:33:51: warning: unused variable ‘cost’ [-Wunused-variable] int N, E, d[50001], i, a, b, c, min, k, j, fare, cost; ^ user.cpp:36:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &N, &E); ^ user.cpp:39:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d", &a, &b, &c); ^ user.cpp:64:15: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] first = L[k]; ^