Compilare: main.cpp: In function 'int main()': main.cpp:47:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < components.size(); ++i) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp:49:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < i && pntComp[j] >= components[j].size()) { main.cpp:55:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < i && pntComp[j] == components[j].size() * 2) main.cpp:65:53: warning: format '%d' expects argument of type 'int', but argument 4 has type 'std::vector<std::pair<int, int> >::size_type {aka long unsigned int}' [-Wformat=] fprintf(fout, "%d\n%d\n", maxExtra, edges.size()); ^ main.cpp:29:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &N, &M); ^ main.cpp:31:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &a, &b); ^