Compilare: main.cpp: In function 'int main()': main.cpp:105:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 105 | for(j=1; j<adj[i].size(); j++) | ~^~~~~~~~~~~~~~ main.cpp:71:17: warning: unused variable 'l' [-Wunused-variable] 71 | int n,i,j,k,l,a,r,cnt=0,mod2; | ^ main.cpp:77:16: warning: iteration 10004 invokes undefined behavior [-Waggressive-loop-optimizations] 77 | fact[i]=(fact[i-1]*i)%mod; | ~~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:75:15: note: within this loop 75 | for(i=1; i<=90005; i++) | ~^~~~~~~