0_0_10334087_22755.cpp: In function `void dfs(int, int, int, int)':
0_0_10334087_22755.cpp:5: error: `n' undeclared (first use this function)
0_0_10334087_22755.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10334087_22755.cpp:9: error: `cnt' undeclared (first use this function)
0_0_10334087_22755.cpp:13: error: `b' undeclared (first use this function)
0_0_10334087_22755.cpp:13: error: `printf' undeclared (first use this function)
0_0_10334087_22755.cpp:19: error: `len' undeclared (first use this function)
0_0_10334087_22755.cpp:21: error: `a' undeclared (first use this function)
0_0_10334087_22755.cpp: In function `int main()':
0_0_10334087_22755.cpp:31: error: `n' undeclared (first use this function)
0_0_10334087_22755.cpp:31: error: `len' undeclared (first use this function)
0_0_10334087_22755.cpp:31: error: `scanf' undeclared (first use this function)
0_0_10334087_22755.cpp:34: error: `a' undeclared (first use this function)
0_0_10334087_22755.cpp:35: error: `printf' undeclared (first use this function)
0_0_10334087_22755.cpp:36: error: `cnt' undeclared (first use this function)
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