uses crt; const n=5; var a:array[1..n,1..n] of integer; i,j,sum:integer; begin clrscr; writeln('Введите ',n*n,' матрицу:'); for i:=1 to n do for j:=1 to n do begin write('a[',i,',',j,']='); readln(a[i,j]); end; clrscr; writeln('Матрица:'); sum:=0; for i:=1 to n do begin for j:=1 to n do begin write(a[i,j]:4); if j=i then s:=sum+sqr(a[i,j]); end; writeln; end; write('Сумма квадратов элементов диагонали=',s); readln end.