Compilare: main.cpp: In constructor 'Query::Query(int, int, int)': main.cpp:12:9: warning: 'Query::sum' will be initialized after [-Wreorder] int sum; ^~~ main.cpp:11:9: warning: 'int Query::node' [-Wreorder] int node; ^~~~ main.cpp:13:5: warning: when initialized here [-Wreorder] Query(int i, int s, int n) : idx(i), sum(s), node(n) {} ^~~~~ main.cpp: In function 'int main()': main.cpp:55:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < costs.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:23:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("br.in", "r", stdin); ^ main.cpp:24:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("br.out", "w", stdout); ^