Compilare: main.cpp: In function 'int main()': main.cpp:83:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gr[0][2].size();++i) ~^~~~~~~~~~~~~~~~ main.cpp:85:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gr[1][1].size();++i) ~^~~~~~~~~~~~~~~~ main.cpp:91:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gr[0][1].size();++i) ~^~~~~~~~~~~~~~~~ main.cpp:93:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gr[1][2].size();++i) ~^~~~~~~~~~~~~~~~ main.cpp:65:9: warning: unused variable 'rasp' [-Wunused-variable] int rasp=0,nrg=0; ^~~~