Compilare: user.cpp: In function ‘void Get(int&)’: user.cpp:115:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for (; s[u] < '0' || s[u] > '9'; Next()); ^~~ user.cpp:116:6: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ if ( s[u-1] == '-') ^~ user.cpp: In function ‘int main()’: user.cpp:23:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("concurs.in","r",stdin); ^ user.cpp:24:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("concurs.out","w",stdout); ^ user.cpp: In function ‘void Next()’: user.cpp:110:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] std::fread(s, 1, Lim, stdin), u = 0; ^ user.cpp: In function ‘int main()’: user.cpp:44:16: warning: ‘Rad’ may be used uninitialized in this function [-Wmaybe-uninitialized] DFS(Rad, 1); ^