0_0_21009486_25822.cpp: In function 'int main()':
0_0_21009486_25822.cpp:56:26: error: 'building' was not declared in this scope
scan("%d%d",&building[i].w,&building[i].s);
^
0_0_21009486_25822.cpp:56:54: error: 'scan' was not declared in this scope
scan("%d%d",&building[i].w,&building[i].s);
^
0_0_21009486_25822.cpp:59:14: error: 'building' was not declared in this scope
sort(building,building+n,cmp);
^
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