Compilare: main.cpp: In function 'bool sor(std::vector<int>, std::vector<int>)': main.cpp:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int f=0;f<x.size();f++) ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:48:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&t); ^ main.cpp:56:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ main.cpp:61:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&a); ^