0_0_11538496_19815.cpp:1:25: bits/stdc++.h: No such file or directory
0_0_11538496_19815.cpp:19: error: expected constructor, destructor, or type conversion before '<' token
0_0_11538496_19815.cpp:19: error: expected `,' or `;' before '<' token
0_0_11538496_19815.cpp: In function `bool isPerfectSquare(int)':
0_0_11538496_19815.cpp:24: error: `sqrt' undeclared (first use this function)
0_0_11538496_19815.cpp:24: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11538496_19815.cpp: In function `void dfs(int)':
0_0_11538496_19815.cpp:36: error: `fill' undeclared (first use this function)
0_0_11538496_19815.cpp:39: error: `stack' undeclared (first use this function)
0_0_11538496_19815.cpp:39: error: expected primary-expression before "int"
0_0_11538496_19815.cpp:39: error: expected `;' before "int"
0_0_11538496_19815.cpp:40: error: `second' undeclared (first use this function)
0_0_11538496_19815.cpp:47: error: `graph' undeclared (first use this function)
0_0_11538496_19815.cpp: In function `int main()':
0_0_11538496_19815.cpp:61: error: `cin' undeclared (first use this function)
0_0_11538496_19815.cpp:66: error: `graph' undeclared (first use this function)
0_0_11538496_19815.cpp:66: error: `vector' undeclared (first use this function)
0_0_11538496_19815.cpp:66: error: expected primary-expression before "int"
0_0_11538496_19815.cpp:66: error: expected `;' before "int"
0_0_11538496_19815.cpp:93: error: `cout' undeclared (first use this function)
0_0_11538496_19815.cpp:93: error: `endl' undeclared (first use this function)
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