0_0_33510684_7615.cpp: In function 'bool operator<(Huffman_trie, Huffman_trie)':
0_0_33510684_7615.cpp:15:5: error: named return values are no longer supported
return a.freq>b.freq;
^
0_0_33510684_7615.cpp:15:21: error: expected '{' at end of input
return a.freq>b.freq;
^
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