Compilare: main.cpp: In function 'int main()': main.cpp:23:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1;i<=n;i++) ^~~ main.cpp:25:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(i=1;i<=n;i++) ^~~ main.cpp:17:23: warning: unused variable 'x' [-Wunused-variable] long a[5][50001],x,y,f1,f2; ^ main.cpp:17:25: warning: unused variable 'y' [-Wunused-variable] long a[5][50001],x,y,f1,f2; ^