Compilare: main.cpp: In function 'int main()': main.cpp:14:29: warning: format '%s' expects argument of type 'char*', but argument 3 has type 'char (*)[2000001]' [-Wformat=] fscanf(fin, "%s\n%s",&a,&b); ^ main.cpp:14:29: warning: format '%s' expects argument of type 'char*', but argument 4 has type 'char (*)[2000001]' [-Wformat=] main.cpp:14:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s\n%s",&a,&b); ^