Compilare: main.cpp: In function 'int main()': main.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<pal[i].size();j++){ ~^~~~~~~~~~~~~~ main.cpp:76:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<pal[inc].size();j++){ ~^~~~~~~~~~~~~~~~ main.cpp:16:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d\n",&n); ^