Compilare: user.cpp: In function ‘int FindParent(TreeNode*&, TreeNode*&)’: user.cpp:64:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<parent->sons.size();i++){ ^ user.cpp: In function ‘void DFS(TreeNode*)’: user.cpp:96:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<node->sons.size();i++) ^ user.cpp: In function ‘void DinamicProgramming(TreeNode*)’: user.cpp:102:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<node->sons.size();i++) ^ user.cpp:108:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<node->sons.size();j++){ ^ user.cpp: In function ‘void Reconstitute(TreeNode*)’: user.cpp:138:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<node->sons.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:142:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("soc2.in","r",stdin); ^ user.cpp:143:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("soc2.out","w",stdout); ^ user.cpp:145:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:147:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&value[i]); ^ user.cpp:149:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^ user.cpp: In function ‘void Reconstitute(TreeNode*)’: user.cpp:134:22: warning: ‘which’ may be used uninitialized in this function [-Wmaybe-uninitialized] seen[which]=1; ^