Compilare: main.cpp: In function 'int main()': main.cpp:96:15: warning: unused variable 'j' [-Wunused-variable] 96 | int k,q,i,j,x,y,t,s; | ^ main.cpp: In function 'void precalc()': main.cpp:79:16: warning: iteration 2000004 invokes undefined behavior [-Waggressive-loop-optimizations] 79 | fact[i]=1LL*fact[i-1]*i%MOD; | ~~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp:78:14: note: within this loop 78 | for(i=1;i<=NMAX2;i++) | ~^~~~~~~