Compilare: main.cpp: In function 'int main()': main.cpp:36:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i=0;i<cuv.size();i++) | ~^~~~~~~~~~~ main.cpp:31:16: warning: iteration 1000003 invokes undefined behavior [-Waggressive-loop-optimizations] 31 | fact[i]=(1LL*i*fact[i-1])%mod; | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:30:18: note: within this loop 30 | for(int i=2;i<=1000005;i++) | ~^~~~~~~~~