Compilare: main.cpp: In function 'int main()': main.cpp:52:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1;i<=n;++i) ^~~ main.cpp:59:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' cin>>l1>>c1>>l2>>c2; ^~~ main.cpp:77:21: warning: unused variable 'u' [-Wunused-variable] int u=300; ^