0_0_7480403_30555.cpp: In function `void DFS(int, int, std::vector<int, std::allocator<int> >)':
0_0_7480403_30555.cpp:20: error: `itoa' undeclared (first use this function)
0_0_7480403_30555.cpp:20: error: (Each undeclared identifier is reported only once for each function it appears in.)
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