Compilare: main.cpp: In function 'std::tuple<int, int, int> solve(std::vector<std::pair<signed char, signed char> >&, std::vector<std::pair<signed char, signed char> >&, int, int)': main.cpp:29:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(right-left<2) ^ main.cpp: In function 'int main()': main.cpp:47:11: warning: unused variable 'j' [-Wunused-variable] int n,i,j,x,s=0; ^