Compile Error
foo.cc: In function 'int main()':
foo.cc:7:15: error: lvalue required as left operand of assignment
7 | if(400%a=0){
| ~~~^~
foo.cc:10:13: error: lvalue required as left operand of assignment
10 | if(4%a=0 && a%100!=0){
| ~^~
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