Compilare: main.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas] # pragma GCC optimization ("unroll-loops") main.cpp: In function 'int32_t main()': main.cpp:6:21: warning: this 'for' clause does not guard... [-Wmisleading-indentation] #define forn(i,a,b) for (int i = a; i <= b; i++) ^ main.cpp:41:2: note: in expansion of macro 'forn' forn(i,1,n)len[i]=-1; len[s]=0; ^~~~ main.cpp:41:24: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' forn(i,1,n)len[i]=-1; len[s]=0; ^~~