Compilare: user.cpp: In member function ‘int hashtable::max_conf()’: user.cpp:69: warning: comparison between signed and unsigned integer expressions user.cpp: In member function ‘void tractor::generate_children()’: user.cpp:125: warning: comparison between signed and unsigned integer expressions user.cpp:132: warning: comparison between signed and unsigned integer expressions user.cpp:133: warning: comparison between signed and unsigned integer expressions user.cpp:140: warning: comparison between signed and unsigned integer expressions user.cpp:141: warning: comparison between signed and unsigned integer expressions user.cpp:142: warning: comparison between signed and unsigned integer expressions user.cpp:150: warning: comparison between signed and unsigned integer expressions user.cpp:151: warning: comparison between signed and unsigned integer expressions user.cpp:152: warning: comparison between signed and unsigned integer expressions user.cpp:153: warning: comparison between signed and unsigned integer expressions user.cpp:163: warning: comparison between signed and unsigned integer expressions user.cpp:164: warning: comparison between signed and unsigned integer expressions user.cpp:165: warning: comparison between signed and unsigned integer expressions user.cpp:166: warning: comparison between signed and unsigned integer expressions user.cpp:167: warning: comparison between signed and unsigned integer expressions user.cpp:177: warning: comparison between signed and unsigned integer expressions user.cpp:178: warning: comparison between signed and unsigned integer expressions user.cpp:179: warning: comparison between signed and unsigned integer expressions user.cpp:180: warning: comparison between signed and unsigned integer expressions user.cpp:181: warning: comparison between signed and unsigned integer expressions user.cpp:182: warning: comparison between signed and unsigned integer expressions user.cpp:193: warning: comparison between signed and unsigned integer expressions user.cpp:194: warning: comparison between signed and unsigned integer expressions user.cpp:195: warning: comparison between signed and unsigned integer expressions user.cpp:196: warning: comparison between signed and unsigned integer expressions user.cpp:197: warning: comparison between signed and unsigned integer expressions user.cpp:198: warning: comparison between signed and unsigned integer expressions user.cpp:199: warning: comparison between signed and unsigned integer expressions user.cpp: In member function ‘int tractor::find(int, int)’: user.cpp:233: warning: comparison between signed and unsigned integer expressions user.cpp:236: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:322: warning: format ‘%d’ expects type ‘int’, but argument 4 has type ‘long long int’ user.cpp:323: warning: format ‘%d’ expects type ‘int’, but argument 4 has type ‘long long int’ user.cpp:326: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long long int’ user.cpp:301: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:302: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:307: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:312: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:317: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result