Compilare: main.cpp: In member function 'void Forest::roll_back(int)': main.cpp:45:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(Moves.size() > t) ~~~~~~~~~~~~~^~~ main.cpp: In function 'void divide(int, int, int)': main.cpp:96:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; ANS && i<where2.size(); ++i) ~^~~~~~~~~~~~~~ main.cpp:98:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < where1.size() && where1[j] != where2[i]) ++j; ~~^~~~~~~~~~~~~~~ main.cpp:99:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j == where1.size()) ANS = 0; ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:152:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("colors2.in", "r", stdin); ^ main.cpp:153:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("colors2.out", "w", stdout); ^