Compilare: main.cpp: In function 'void lazy_flip(std::vector<node>&, int)': main.cpp:23:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | if(2*i<aint.size()); | ~~~^~~~~~~~~~~~ main.cpp:23:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] 23 | if(2*i<aint.size()); | ^~ main.cpp:24:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if' 24 | aint[2*i].lazy=aint[2*i+1].lazy=1; | ^~~~