Compilare: main.cpp: In function 'int main()': main.cpp:21:28: warning: NULL used in arithmetic [-Wpointer-arith] 21 | for(int i=0; c[i]!=NULL; i++) | ^~~~ main.cpp:108:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 108 | for(int i=a; i<=b; i++) | ^~~ main.cpp:142:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 142 | cout<<sol; | ^~~~