Compilare: main.cpp:4:40: warning: bad option '-f unroll-loops' to pragma 'optimize' [-Wpragmas] 4 | #pragma GCC optimize("O3, unroll-loops") | ^ main.cpp:15:18: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] 15 | char read_ch() { | ^ main.cpp:25:30: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] 25 | InParser(const char* name) { | ^ main.cpp:29:32: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] 29 | InParser &operator>>(int &n) { | ^ main.cpp:55:11: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] 55 | void read() { | ^ main.cpp:69:12: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] 69 | void solve() { | ^ main.cpp: In function 'void solve()': main.cpp:81:29: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 81 | if (graph[i].size() > mx1) { | ~~~~~~~~~~~~~~~~^~~~~ main.cpp:87:34: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 87 | else if (graph[i].size() > mx2) { | ~~~~~~~~~~~~~~~~^~~~~ main.cpp: At global scope: main.cpp:95:10: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] 95 | int main() { | ^ main.cpp: In function 'void solve()': main.cpp:79:34: warning: 'node2' may be used uninitialized [-Wmaybe-uninitialized] 79 | int mx1 = 0, mx2 = 0, node1, node2; | ^~~~~ main.cpp:79:27: warning: 'node1' may be used uninitialized [-Wmaybe-uninitialized] 79 | int mx1 = 0, mx2 = 0, node1, node2; | ^~~~~