Compilare: main.cpp: In function 'int main()': main.cpp:24:25: warning: unused variable 'ans' [-Wunused-variable] int lo = 1, hi = 1, ans = 0, cn = n * 2, bestsum = -inf, beg, sum; ^~~ main.cpp:30:17: warning: 'sum' may be used uninitialized in this function [-Wmaybe-uninitialized] sum += v[i]; ~~~~^~~~~~~ main.cpp:24:62: warning: 'beg' may be used uninitialized in this function [-Wmaybe-uninitialized] int lo = 1, hi = 1, ans = 0, cn = n * 2, bestsum = -inf, beg, sum; ^~~