Решите подробно с объяснениями , буду .

uses crt;
var i,j,k,n,sum:integer;
a:array[1..100] of integer;
flag:boolean;
begin
flag:=false;
writeln('Input N');
read(n);
writeln('Input elements');
for i:=1 to n do
read(a[i]);
for i:=1 to n do
for j:=1 to n do
for k:=1 to n do
if (i<>j) and (j<>k) and (i<>k) then
if a[i]+a[j]+a[k]=0 then 
f flag=false then
writeln('No');
end.   uses crt;
var i,j,k,n,sum:integer;
a:array[1..100] of integer;
flag:boolean;
begin
flag:=false;
writeln('Input N');
read(n);
writeln('Input elements');
for i:=1 to n do
read(a[i]);
for i:=1 to n do
for j:=1 to n do
for k:=1 to n do
if (i<>j) and (j<>k) and (i<>k) then
if a[i]+a[j]+a[k]=0 then 
f flag=false then
writeln('No');
end.

Const n=5; m=3;
var x,y:array[1..n] of real; i:integer; t:boolean;
begin
for i:=1 to n do read(x[i]);
for i:=1 to n do if x[i]>m then y[i]:=x[i];
t:=true;
while t do begin
t:=false;
for i:=1 to n-1 do if ((y[i]<=m) or (y[i]>y[i+1])) and (y[i+1]>m) then begin
t:=true;
y[i]:=y[i]+y[i+1]; y[i+1]:=y[i]-y[i+1]; y[i]:=y[i]-y[i+1]
end
end;
for i:=1 to n do if y[i]>m then write(y[i],' ') else break;
writeln;
for i:=1 to n-1 do begin
if y[i]<=m then break;
if y[i]=y[i+1] then begin
if t=false then begin t:=true; write(i,' ') end;
write(i+1,' ') end
else t:=false
end
end.