Compilare: main.cpp: In function 'int main()': main.cpp:492:22: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:493:39: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' out<<"1\n"; break; ^~~~~ main.cpp:470:9: warning: unused variable 'Op' [-Wunused-variable] int Op; ^~ main.cpp:471:12: warning: unused variable 'y' [-Wunused-variable] int x, y; ^