Compilare: main.cpp: In function 'int main()': main.cpp:17:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] cin >> s + 1; ~~^~~ main.cpp:15:12: warning: unused variable 'k' [-Wunused-variable] int n, k = 0, i, ok = 0, inc = 1, sf = 0, inc2 = 1; ^ main.cpp:15:47: warning: unused variable 'inc2' [-Wunused-variable] int n, k = 0, i, ok = 0, inc = 1, sf = 0, inc2 = 1; ^~~~