Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:59:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (it != father) ^ user.cpp: In function ‘void Solve(int, int)’: user.cpp:110:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < cycle[id].size(); j++) { ~~^~~~~~~~~~~~~~~~~~ user.cpp:113:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == cycle[id].size()) ~~^~~~~~~~~~~~~~~~~~~ user.cpp:118:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cycle[id].size(); i++) { ~~^~~~~~~~~~~~~~~~~~ user.cpp:132:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < cycle[id].size(); i++) { ~~^~~~~~~~~~~~~~~~~~ user.cpp: In function ‘char Advance()’: user.cpp:25:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:148:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pastrafaceri.in", "r", stdin); ^ user.cpp:149:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pastrafaceri.out", "w", stdout); ^ user.cpp:151:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:153:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &value[i]); ^ user.cpp:156:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^