Compilare: user.cpp: In function ‘void Solve()’: user.cpp:59:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( p[l] >= pos[ l ].size() ) ^ user.cpp:68:21: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d", ans); ^ user.cpp: In function ‘void Set()’: user.cpp:41:17: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(S1 + 1); ^ user.cpp:42:17: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(S2 + 1); ^ /tmp/ccYIRyM0.o: In function `Set()': user.cpp:(.text+0x263): warning: the `gets' function is dangerous and should not be used.