Compilare: main.cpp: In member function 'void Btree::insert_not_full(Node*, int)': main.cpp:98:48: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 98 | if (node->children[i + 1]->keys.size() == (2 * this->t - 1)) /// if the selected child is full we split it | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Btree::insert(int)': main.cpp:111:31: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 111 | if (old_root->keys.size() == ((2 * this->t) - 1)) // if the root is full add a new node to the tree and make it the new root | ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Btree::printTree(Node*, int)': main.cpp:127:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 127 | for (int i = 0; i < node->keys.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'bool Btree::find(int, Node*)': main.cpp:142:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 142 | while (i < node->keys.size() && k > node->keys[i]) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:144:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 144 | if (i < node->keys.size() && node->keys[i] == k) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Btree::deleteKey(Node*, int)': main.cpp:157:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 157 | while (i < node->keys.size() && k > node->keys[i]) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:161:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 161 | if (i < node->keys.size() && node->keys[i] == k) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:168:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 168 | if (i < node->keys.size() && node->keys[i] == k) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:170:45: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 170 | else if (node->children[i]->keys.size() >= t) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:175:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Node*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 175 | if (i != 0 && i + 2 < node->children.size()) | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:177:52: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 177 | if (node->children[i - 1]->keys.size() >= t) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:179:57: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 179 | else if (node->children[i + 1]->keys.size() >= t) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:186:52: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 186 | if (node->children[i + 1]->keys.size() >= t) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:191:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Node*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 191 | else if (i + 1 == node->children.size()) | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:192:52: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 192 | if (node->children[i - 1]->keys.size() >= t) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~