Compilare: main.cpp: In function 'int main()': main.cpp:20:10: warning: statement has no effect [-Wunused-value] for(b;(1<<b)<n;++b); ^ main.cpp:24:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=n-1;i>=0;--i) ^~~ main.cpp:33:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' len[0]=0; ^~~ main.cpp:13:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aranjare3.in","r",stdin); ^ main.cpp:14:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aranjare3.out","w",stdout); ^