Compilare: In file included from /usr/include/c++/6/cassert:44:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:33, from main.cpp:1: main.cpp: In function 'int main()': main.cpp:51:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(m >= ans.size()); ~~^~~~~~~~~~~~~ main.cpp:40:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arbsat2.in", "r", stdin); ^ main.cpp:41:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("arbsat2.out", "w", stdout); ^