Compilare: user.cpp: In function ‘int main()’: user.cpp:13:20: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[1000001]’ [-Wformat=] fscanf(f, "%s", &s); ^ user.cpp:16:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < (strlen(s) - 1) && nr < X; i++) ^ user.cpp:12:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%lld %lld", &N, &X); ^ user.cpp:13:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s", &s); ^