0_0_9146156_1949.cpp:7:25: unordered_map: No such file or directory
0_0_9146156_1949.cpp:16: error: expected constructor, destructor, or type conversion before '<' token
0_0_9146156_1949.cpp:16: error: expected `,' or `;' before '<' token
0_0_9146156_1949.cpp: In function `long long int dfs(int)':
0_0_9146156_1949.cpp:97: error: `s' undeclared (first use this function)
0_0_9146156_1949.cpp:97: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9146156_1949.cpp:99: error: `unordered_map' undeclared (first use this function)
0_0_9146156_1949.cpp:99: error: expected primary-expression before "long"
0_0_9146156_1949.cpp:99: error: expected `;' before "long"
0_0_9146156_1949.cpp:106: error: invalid type in declaration before '=' token
0_0_9146156_1949.cpp:107: error: base operand of `->' is not a pointer
0_0_9146156_1949.cpp:108: error: `iter' undeclared (first use this function)
0_0_9146156_1949.cpp:109: error: base operand of `->' is not a pointer
0_0_9146156_1949.cpp:111: error: invalid type in declaration before '=' token
0_0_9146156_1949.cpp:112: error: base operand of `->' is not a pointer
0_0_9146156_1949.cpp:115: error: base operand of `->' is not a pointer
0_0_9146156_1949.cpp:117: error: base operand of `->' is not a pointer
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