Compilare: main.cpp: In function 'int main()': main.cpp:29:46: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 29 | if(a[i].x<a[mn].x || a[i].x==a[mn].x && a[i].y<a[mn].y) mn=i; | ^ main.cpp:39:9: warning: this 'while' clause does not guard... [-Wmisleading-indentation] 39 | while(l>=2 && det(a[l-1],a[l],a[i])<0) | ^~~~~ main.cpp:41:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while' 41 | a[++l]=a[i]; | ^