Compilare: main.cpp: In constructor 'Node::Node(int, long long int, int)': main.cpp:7:26: warning: 'Node::sum' will be initialized after [-Wreorder] int mxm, lzy; long long sum; ^~~ main.cpp:7:11: warning: 'int Node::lzy' [-Wreorder] int mxm, lzy; long long sum; ^~~ main.cpp:9:2: warning: when initialized here [-Wreorder] Node(int _mxm = 0, long long _sum = 0, int _lzy = 0) : ^~~~ main.cpp: In function 'long long int querySum(int, int, int, int, int)': main.cpp:96:58: warning: control reaches end of non-void function [-Wreturn-type] return querySum(nd << 1 | 1, md + 1, ri, st, en); } } } ^ main.cpp: In function 'int main()': main.cpp:99:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("vaporeon.in", "r", stdin); ^ main.cpp:100:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("vaporeon.out", "w", stdout); ^