Compilare: user.cpp: In function ‘void arboreCostMinim()’: user.cpp:63:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vecini[destin].size(); i++) ^ user.cpp:69:26: warning: unused variable ‘nr2’ [-Wunused-variable] int nr1, nr2, nr3; ^ user.cpp:80:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i++) ^ user.cpp: In function ‘void citire()’: user.cpp:16:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:22:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &tmp1, &tmp2, &tmp3); ^ user.cpp: In function ‘int main()’: user.cpp:88:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.in", "r", stdin); ^ user.cpp:89:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.out", "w", stdout); ^