Compilare: main.cpp: In function 'void read()': main.cpp:17:9: warning: unused variable 'x' [-Wunused-variable] int x,y; ^ main.cpp:17:11: warning: unused variable 'y' [-Wunused-variable] int x,y; ^ main.cpp: In function 'void a()': main.cpp:42:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=N;i++) ^~~ main.cpp:48:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' fout << ans; ^~~~