Compilare: main.cpp: In function 'int main()': main.cpp:16:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[i] * v[i - 1] > i1 && i1 <= i2) { ~~~~~~~~~~~~~~~~^~~~ main.cpp:21:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (v[i] * v[i - 1] > i2 && i2 < i1) { ~~~~~~~~~~~~~~~~^~~~ main.cpp:26:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i >= 3 && v[i] * v[i - 1] * v[i - 2] > big) { ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~