tgraf.cpp: In function 'int main()': tgraf.cpp:75: warning: format '%ld' expects type 'long int', but argument 2 has type 'int' tgraf.cpp:77: warning: format '%ld' expects type 'long int', but argument 2 has type 'int' tgraf.cpp:55: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result tgraf.cpp:56: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result tgraf.cpp:58: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result tgraf.cpp:60: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result tgraf.cpp:65: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result