Compilare: main.cpp: In function 'int main()': main.cpp:49:110: warning: 'd' may be used uninitialized in this function [-Wmaybe-uninitialized] long long d = arie - ar(points[i - 1], points[i], points[i + 1]) + ar(points[i - 1], {points[i].x, d + points[i].y}, points[i + 1]); ~~^~~~~~~~~~~~~