Compilare: main.cpp: In function 'int main()': main.cpp:65:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<ciur[a].size();j++){ ~^~~~~~~~~~~~~~~ main.cpp:68:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<ciur[a].size();j++){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'char adv()': main.cpp:32:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer,1,SIZE,fin); ^