Compilare: main.cpp: In function 'void ford(int, int, int)': main.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graf[elem].size();i++) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:9: warning: unused variable 'ns' [-Wunused-variable] int ns,pic; ^~ main.cpp:61:21: warning: iteration 50005 invokes undefined behavior [-Waggressive-loop-optimizations] verif[i]=0; ~~~~~~~~^~ main.cpp:59:22: note: within this loop for(int i=0;i<=NMax;i++) ~^~~~~~