Compilare: main.cpp: In function 'int main()': main.cpp:72:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < aux.size(); i++) ~~^~~~~~~~~~~~ main.cpp:79:32: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<std::vector<int> >::size_type {aka long unsigned int}' [-Wformat=] fprintf(out, "%d\n", r.size()); ^ main.cpp:80:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < r.size(); i++){ ~~^~~~~~~~~~ main.cpp:81:36: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=] fprintf(out, "%d ", r[i].size()); ^ main.cpp:82:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < r[i].size() - 1; j++){ ~~^~~~~~~~~~~~~~~~~ main.cpp:39:26: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s1, MAXN + 2, in); ^ main.cpp:40:26: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s2, MAXN + 2, in); ^