Compilare: main.cpp: In function 'int main()': main.cpp:22:31: warning: 'fin' may be used uninitialized in this function [-Wmaybe-uninitialized] 22 | int x, y, n, l, i, start, fin; | ^~~ main.cpp:45:56: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized] 45 | ans += p[i].x * p[i + 1].y - p[i + 1].x * p[i].y; | ~~~~~^