Compilare: main.cpp: In function 'int main()': main.cpp:77:37: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=] fprintf (fout, "%d\n", sol.size() ) ; ^ main.cpp:78:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < sol.size() ; i++ ) ~~^~~~~~~~~~~~ main.cpp:56:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &n ) ; ^ main.cpp:58:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &a, &b ) ; ^ main.cpp: In function 'char veriftati(int, int)': main.cpp:36:25: warning: 'bun' may be used uninitialized in this function [-Wmaybe-uninitialized] return 1 - stare[bun] ; ~~~~~~~~~^