Compilare: main.cpp: In function 'int find_ans(int)': main.cpp:167:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = k; i < desc_sizes.size(); i++) ret += desc_sizes[i]; ~~^~~~~~~~~~~~~~~~~~~ main.cpp:168:8: warning: statement has no effect [-Wunused-value] main.cpp:127:20: #define debug(...) (__VA_ARGS__) ~~~~~~~~~~~~~ main.cpp:168:8: debug(desc_sizes); main.cpp:127:21: note: in definition of macro 'debug' #define debug(...) (__VA_ARGS__) ^~~~~~~~~~~ main.cpp: In function 'std::pair<int, int> find_roots()': main.cpp:187:10: warning: statement has no effect [-Wunused-value] main.cpp:127:20: #define debug(...) (__VA_ARGS__) ~~~~~~~~~~~~~ main.cpp:187:10: debug(i); main.cpp:127:21: note: in definition of macro 'debug' #define debug(...) (__VA_ARGS__) ^~~~~~~~~~~ main.cpp: In function 'int32_t main()': main.cpp:230:8: warning: statement has no effect [-Wunused-value] main.cpp:127:20: #define debug(...) (__VA_ARGS__) ~~~~~~~~~~~~~ main.cpp:230:8: debug(roots); main.cpp:127:21: note: in definition of macro 'debug' #define debug(...) (__VA_ARGS__) ^~~~~~~~~~~ main.cpp:214:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(PROB_NAME".in", "r", stdin); ^ main.cpp:215:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(PROB_NAME".out", "w", stdout); ^