Compilare: main.cpp: In constructor 'Node::Node(int, long long int, int)': main.cpp:9:26: warning: 'Node::sum' will be initialized after [-Wreorder] int mxm, lzy; long long sum; ^~~ main.cpp:9:11: warning: 'int Node::lzy' [-Wreorder] int mxm, lzy; long long sum; ^~~ main.cpp:11:2: warning: when initialized here [-Wreorder] Node(int _mxm = 0, long long _sum = 0, int _lzy = 0) : ^~~~ main.cpp: In function 'int main()': main.cpp:106:36: 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:107:38: 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); ^ main.cpp:109:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int n, k; scanf("%d %d", &n, &k); ^ main.cpp:111:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &arr[i]); lst[i] = make_pair(arr[i], i); } ^ main.cpp:122:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] t = 0; scanf("%d", &t); ^ main.cpp:125:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int p; scanf("%d", &p); p ^= ans; ^ main.cpp:151:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int x, y; scanf("%d %d", &x, &y); x ^= ans; y ^= ans; ^