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lehuytuan64


giup minh voi sap thi roi
tim a,b,c,d biet :a,10a+d, 10c+d, 1000a+100b+10c+d la so chinh phuong
dang voi luc khac danh len tiep
tim a,b,c,d biet :a,10a+d, 10c+d, 1000a+100b+10c+d la so chinh phuong
dang voi luc khac danh len tiep