Compilare: main.cpp: In function 'int main()': main.cpp:82:15: warning: 'retin' may be used uninitialized [-Wmaybe-uninitialized] 82 | update(1,1,n,retin,i,a[i]); | ~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp:47:11: note: 'retin' was declared here 47 | int i,retin,sol=0; | ^~~~~