Compilare: main.cpp: In function 'long long int querySum(int, int, int, int, int)': main.cpp:97:58: 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:100:36: 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:101:38: 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); ^