Compilare: main.cpp: In function 'void read()': main.cpp:139:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=k;i++) ^~~ main.cpp:141:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' k=0; ^ main.cpp: In function 'int main()': main.cpp:146:9: warning: unused variable 'x' [-Wunused-variable] int x,y; ^ main.cpp:146:11: warning: unused variable 'y' [-Wunused-variable] int x,y; ^