Compilare: main.cpp: In function 'int main()': main.cpp:25:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("vase.in","r",stdin); ^ main.cpp:26:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("vase.out","w",stdout); ^ main.cpp:89:17: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized] if(s=='D') ^~ main.cpp:77:17: warning: 'd' may be used uninitialized in this function [-Wmaybe-uninitialized] if(d=='D') ^~ main.cpp:84:15: warning: 'dr' may be used uninitialized in this function [-Wmaybe-uninitialized] dr+=(cfirst->val)/2; ~~^~~~~~~~~~~~~~~~~ main.cpp:96:16: warning: 'stg' may be used uninitialized in this function [-Wmaybe-uninitialized] stg+=(cfirst->val)/2; ~~~^~~~~~~~~~~~~~~~~