Compilare: main.cpp: In function 'int main()': main.cpp:46:50: 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", cost, muchii.size()); ^ main.cpp:47:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<muchii.size();i++) ~^~~~~~~~~~~~~~ main.cpp:30:26: warning: unused variable 'j' [-Wunused-variable] int n, m, i, cost=0, j; ^ main.cpp:33:32: 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:35:57: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &v[i].a, &v[i].b, &v[i].c); ^