Compilare: main.cpp: In function 'int main()': main.cpp:53:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < K && i < comps.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:36:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &N, &K); ^ main.cpp:39:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x, &y); ^