Compilare: main.cpp: In function 'int main()': main.cpp:133:33: 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: In function 'char adv()': main.cpp:59:37: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf,sizeof(char),SIZE,fin); ^ main.cpp: In function 'int main()': main.cpp:81:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&m); ^