Compilare: main.cpp: In function 'std::vector<int> Find(int, int, int, int, int)': main.cpp:57:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a.size()==j && b.size()==need-j) ~~~~~~~~^~~ main.cpp:57:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a.size()==j && b.size()==need-j) ~~~~~~~~^~~~~~~~ main.cpp:69:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a.size()==j && b.size()==need-j) ~~~~~~~~^~~ main.cpp:69:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a.size()==j && b.size()==need-j) ~~~~~~~~^~~~~~~~ main.cpp: In function 'int main()': main.cpp:132:49: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("colorfulconflict.in","r",stdin); ^ main.cpp:133:51: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("colorfulconflict.out","w",stdout); ^ main.cpp:194:45: warning: 'cine' may be used uninitialized in this function [-Wmaybe-uninitialized] is_c[c1][c2]=cine; ~~~~~~~~~~~~^~~~~ main.cpp:167:45: warning: 'cine' may be used uninitialized in this function [-Wmaybe-uninitialized] is_r[r1][r2]=cine; ~~~~~~~~~~~~^~~~~