Compilare: user.cpp: In function ‘void readInput()’: user.cpp:21: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int BellmanFordMoore()’: user.cpp:68: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void transformCosts()’: user.cpp:92: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfdir(int)’: user.cpp:129: warning: comparison between signed and unsigned integer expressions user.cpp:125: warning: unused variable ‘j’ user.cpp: In function ‘void dfinv(int)’: user.cpp:145: warning: comparison between signed and unsigned integer expressions user.cpp:141: warning: unused variable ‘j’ user.cpp: In function ‘void StronglyConnectedComponents()’: user.cpp:161: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int SameSCCZeroCostEdges()’: user.cpp:188: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void computeStatistics()’: user.cpp:206: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:241: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result