Compilare: main.cpp: In function 'int main()': main.cpp:11:30: warning: format '%s' expects argument of type 'char*', but argument 3 has type 'char (*)[2000001]' [-Wformat=] fscanf (fin,"%s %s",&a,&b); ^ main.cpp:11:30: warning: format '%s' expects argument of type 'char*', but argument 4 has type 'char (*)[2000001]' [-Wformat=] main.cpp:11:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%s %s",&a,&b); ^ main.cpp:50:37: warning: 'x2' may be used uninitialized in this function [-Wmaybe-uninitialized] nrb2=((((nrb2-((b[i-n1]-'A')*x2)%MOD2+MOD2)%MOD2)*26)%MOD2+b[i]-'A')%MOD2; ~~~~~~~~~~~~~~^~~~ main.cpp:49:37: warning: 'x1' may be used uninitialized in this function [-Wmaybe-uninitialized] nrb1=((((nrb1-((b[i-n1]-'A')*x1)%MOD1+MOD1)%MOD1)*26)%MOD1+b[i]-'A')%MOD1; ~~~~~~~~~~~~~~^~~~