0_0_14231977_4384.cpp: In function 'void build(int, int, int)':
0_0_14231977_4384.cpp:61:27: error: 'read' was not declared in this scope
if(l&1)read(a[o].w[1][1]);//scanf("%lld",&a[o].w[1][1]);
^
0_0_14231977_4384.cpp:62:25: error: 'read' was not declared in this scope
else read(a[o].w[0][0]);//scanf("%lld",&a[o].w[0][0]);
^
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