Borderou de evaluare (job #70746)

Compilare: user.cpp: In function ‘void solve()’: user.cpp:100:12: warning: unused variable ‘num’ [-Wunused-variable] user.cpp:100:30: warning: unused variable ‘d1’ [-Wunused-variable] user.cpp: In function ‘int main()’: user.cpp:179:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:180:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:185:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function ‘void read()’: user.cpp:29:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:31:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function ‘void solve()’: user.cpp:117:9: warning: ‘root’ may be used uninitialized in this function [-Wuninitialized]