Compilare: user.cpp: In function ‘void getSourcesAndDestinations()’: user.cpp:111:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<source.size();++i) ^ user.cpp:112:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<destination.size();++j) ^ user.cpp: In function ‘void cuplaj()’: user.cpp:167:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<source.size();++i) ^ user.cpp: In function ‘void writeSolution()’: user.cpp:181:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<eCuplaj.size();++i) ^ user.cpp:183:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == eCuplaj.size()-1) ^ user.cpp:193:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < source.size() ; ++j) ^ user.cpp:200:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < destination.size() ; ++j) ^