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namespace std {
 using size_t = /* see description */;
 using FILE = /* see description */;
 using fpos_t = /* see description */;
}
 
#define NULL /* see description */
#define _IOFBF /* see description */
#define _IOLBF /* see description */
#define _IONBF /* see description */
#define BUFSIZ /* see description */
#define EOF /* see description */
#define FOPEN_MAX /* see description */
#define FILENAME_MAX /* see description */
#define L_tmpnam /* see description */
#define SEEK_CUR /* see description */
#define SEEK_END /* see description */
#define SEEK_SET /* see description */
#define TMP_MAX /* see description */
#define stderr /* see description */
#define stdin /* see description */
#define stdout /* see description */
 
namespace std {
 int remove(const char* filename);
 int rename(const char* old_p, const char* new_p);
 FILE* tmpfile();
 char* tmpnam(char* s);
 int fclose(FILE* stream);
 int fflush(FILE* stream);
 FILE* fopen(const char* filename, const char* mode);
 FILE* freopen(const char* filename, const char* mode, FILE* stream);
 void setbuf(FILE* stream, char* buf);
 int setvbuf(FILE* stream, char* buf, int mode, size_t size);
 int fprintf(FILE* stream, const char* format, ...);
 int fscanf(FILE* stream, const char* format, ...);
 int printf(const char* format, ...);
 int scanf(const char* format, ...);
 int snprintf(char* s, size_t n, const char* format, ...);
 int sprintf(char* s, const char* format, ...);
 int sscanf(const char* s, const char* format, ...);
 int vfprintf(FILE* stream, const char* format, va_list arg);
 int vfscanf(FILE* stream, const char* format, va_list arg);
 int vprintf(const char* format, va_list arg);
 int vscanf(const char* format, va_list arg);
 int vsnprintf(char* s, size_t n, const char* format, va_list arg);
 int vsprintf(char* s, const char* format, va_list arg);
 int vsscanf(const char* s, const char* format, va_list arg);
 int fgetc(FILE* stream);
 char* fgets(char* s, int n, FILE* stream);
 int fputc(int c, FILE* stream);
 int fputs(const char* s, FILE* stream);
 int getc(FILE* stream);
 int getchar();
 int putc(int c, FILE* stream);
 int putchar(int c);
 int puts(const char* s);
 int ungetc(int c, FILE* stream);
 size_t fread(void* ptr, size_t size, size_t nmemb, FILE* stream);
 size_t fwrite(const void* ptr, size_t size, size_t nmemb, FILE* stream);
 int fgetpos(FILE* stream, fpos_t* pos);
 int fseek(FILE* stream, long int offset, int whence);
 int fsetpos(FILE* stream, const fpos_t* pos);
 long int ftell(FILE* stream);
 void rewind(FILE* stream);
 void clearerr(FILE* stream);
 int feof(FILE* stream);
 int ferror(FILE* stream);
 void perror(const char* s);
}