0_0_21009471_852.cpp: In function 'int main()':
0_0_21009471_852.cpp:56:25: error: 'building' was not declared in this scope
scan("%d%d",building[i].w,building[i].s);
^
0_0_21009471_852.cpp:56:52: error: 'scan' was not declared in this scope
scan("%d%d",building[i].w,building[i].s);
^
0_0_21009471_852.cpp:59:14: error: 'building' was not declared in this scope
sort(building,building+n,cmp);
^
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