Compilare: main.cpp:8: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas] 8 | #pragma GCC optimization ("O3") | main.cpp:9: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas] 9 | #pragma GCC optimization ("unroll-loops") | main.cpp: In function 'void build(int, int, int)': main.cpp:56:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | while (i<A[2*nod].size() && j<A[2*nod+1].size()) | ~^~~~~~~~~~~~~~~~ main.cpp:56:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | while (i<A[2*nod].size() && j<A[2*nod+1].size()) | ~^~~~~~~~~~~~~~~~~~ main.cpp:70:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | while (i<A[2*nod].size()) | ~^~~~~~~~~~~~~~~~ main.cpp:76:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | while (j<A[2*nod+1].size()) | ~^~~~~~~~~~~~~~~~~~