Compilare: main.cpp: In function 'void Verif()': main.cpp:85:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (sol.count() == D) ~~~~~~~~~~~~^~~~ main.cpp: In function 'int main()': main.cpp:109:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (i = 1; i <= k; i++); ^~~ main.cpp:111:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' a[i] = i; ^