Compilare: main.cpp: In function 'void rec(int)': main.cpp:12:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<e[ind].size();i++){ ~^~~~~~~~~~~~~~ main.cpp:15:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<dis[e[ind][i]].size();j++){ ~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void rec2(int)': main.cpp:28:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<er[ind].size();i++){ ~^~~~~~~~~~~~~~~ main.cpp:31:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<dis[er[ind][i]].size();j++){ ~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:42:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("statiuni.in","r",stdin); ^ main.cpp:43:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("statiuni.out","w",stdout); ^