Compilare: main.cpp: In function 'int main()': main.cpp:19:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(unp.size()>=p){ ~~~~~~~~~~^~~ main.cpp:25:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(up.size()>q-p+1){ ~~~~~~~~~^~~~~~ main.cpp:14:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&n,&p,&q); ^