Compilare: main.cpp: In function 'void ciclu_eulerian_smecher()': main.cpp:68:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ciclu.size() == n + 1) { ~~~~~~~~~~~~~^~~~~~~~ main.cpp: In function 'int main()': main.cpp:79:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ulei.in", "r", stdin); ^ main.cpp:80:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ulei.out", "w", stdout); ^ main.cpp:81:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:83:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ main.cpp:85:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &x, &y, &z); ^