Compilare: main.cpp: In function 'void solve()': main.cpp:24:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] int m = l + r >> 1; ~~^~~ main.cpp: In lambda function: main.cpp:41:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; p < aib.size(); p += p&-p) ++aib[p]; ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:60:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("inv.in", "r", stdin); ^ main.cpp:61:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("inv.out", "w", stdout); ^