0_0_33374774_18783.cpp: In function 'int main()':
0_0_33374774_18783.cpp:58:68: error: 'a' was not declared in this scope
for ( int i = 1, u, v; i <= m; ++ i ) scanf ( "%d %d", &u, &v ), a
^
0_0_33374774_18783.cpp:58:68: error: expected '}' at end of input
0_0_33374774_18783.cpp:58:68: error: expected '}' at end of input
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