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uses crt;
var a,b:array[1..100]of integer;
n,i,dem,max,tam,j:integer;
begin
clrscr;
repeat
write('Nhap n='); readln(n);
until (0<n) and (n<=100);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
writeln('Cac so chia het cho 4 la: ');
for i:=1 to n do
if a[i] mod 4=0 then write(a[i]:4);
writeln;
dem:=0;
for i:=1 to n do
if a[i] mod 7=0 then
begin
inc(dem);
b[dem]:=a[i];
end;
max:=b[1];
for i:=1 to dem do
if max<b[i] then max:=b[i];
writeln('So lon nhat chia het cho 7 la: ',max);
writeln('Cac chi so cua no trong day A la: ');
for i:=1 to n do
if max=a[i] then write(i:4);
writeln;
for i:=1 to n-1 do
for j:=i+1 to n do
if a[i]<a[j] then
begin
tam:=a[i];
a[i]:=a[j];
a[j]:=tam;
end;
writeln('Day so sau khi sap xep giam dan la: ');
for i:=1 to n do
write(a[i]:4);
readln;
end.
Sữa lỗi:
phần khai báo:a:array[1..250] of integer (ngoặc vuông ko phải ngoặc tròn)
Bài làm của bạn @lê chí hiếu(bạn được 2,1 điểm)
bài 1
program PTYN;
uses crt;
var a:array[1..100,1..100]of integer;
i,j,m,n:integer;
f1,f2:text;
Max, Min:Integer;
Kt:boolean;
Procedure XuatMang;
begin
For i:=1 to n do
begin
for j:=1 to m do
Write(a[i,j]:4);
Writeln;
end;
end;
Procedure MaxCot(l:Integer);
var p:Integer;
begin
Max:=A[1,l];
For p:=2 to n do
if A[p,l]>Max then Max:=A[p,l];
end;
Procedure MinHang(k:Integer);
var o:integer;
begin
Min:=A[k,1];
For o:=2 to n do
if A[k,o]<Min then Min:=A[k,o];
end;
begin
clrscr;
assign(f1,'ptyn.inp');
assign(f2,'ptyn.out');
reset(f1);rewrite(f2);
while not EOF(f1) do
begin
kt:=false;
readln(f1,n,m);
for i:=1 to n do
begin
for j:=1 to m do
Read(f1,a[i,j]);
readln(f1);
end;
for i:=1 to n do
begin
for j:=1 to n do
begin
MaxCot(j);
MinHang(i);
if Max=Min then
begin
Writeln(f2,'(',i,',',j,')');
kt:=true;
end;
end;
end;
If kt=false then Writeln(f2,'Khong co ptu yen ngua.');
end;
Close(f1); Close(f2);
Readln
End.
Bài 4
const fi='tvh.inp';
fo='tvh.out';
var n,d,dem,sl,s2cs,s3cs,s4cs,s5cs,s6cs,s7cs,k,i,d1:longint;
st,st1,stk:string;
f1,f2:text;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,n,k);
str(n,st);
d:=length(st);
case d of
1: write(9);
2: begin
sl:=n-9;
dem:=9+sl*2;
end;
3: begin
s2cs:=(99-10)+1;
s3cs:=n-99;
dem:=9+s2cs*2+s3cs*3;
end;
4: begin
s2cs:=(99-10)+1;
s3cs:=(999-100)+1;
s4cs:=n-999;
dem:=9+s2cs*2+s3cs*3+s4cs*4;
end;
5: begin
s2cs:=(99-10)+1;
s3cs:=(999-100)+1;
s4cs:=(9999-1000)+1;
s5cs:=n-9999;
dem:=9+s2cs*2+s3cs*3+s4cs*4+s5cs*5;
end;
6: begin
s2cs:=(99-10)+1;
s3cs:=(999-100)+1;
s4cs:=(9999-1000)+1;
s5cs:=(99999-10000)+1;
s6cs:=n-99999;
dem:=9+s2cs*2+s3cs*3+s4cs*4+s5cs*5+s6cs*6;
end;
7: begin
s2cs:=(99-10)+1;
s3cs:=(999-100)+1;
s4cs:=(9999-1000)+1;
s5cs:=(99999-10000)+1;
s6cs:=(999999-1000000)+1;
s7cs:=n-999999;
dem:=9+s2cs*2+s3cs*3+s4cs*4+s5cs*5+s6cs*6+s7cs*7;
end;
end;
if k<=dem then
begin
i:=1;
d1:=0;
repeat
str(i,st1);
d1:=d1+length(st1);
i:=i+1;
until d1>=k;
stk:=st1[length(st1)-(d1-k)];
writeln(f2,stk);
end;
close(f1);
close(f2);
end.
Bài 5
PROGRAM robot;
VAR A:ARRAY[0..30,0..30] OF BYTE;
F:ARRAY[0..30,0..30] OF LONGINT;
m,n:INTEGER;
PROCEDURE Enter;
VAR i,j:INTEGER;
BEGIN
readln(m,n);
FOR i:=1 TO m DO
BEGIN
FOR j:=1 TO n DO read(A[i,j]);
readln;
END;
FOR i:=0 TO m DO A[i,0]:=-1;
FOR j:=0 TO n DO A[0,j]:=-1;
END;
FUNCTION Max(a,b:LONGINT):LONGINT;
BEGINIF (a>b) THEN Max:=a ELSE Max:=b;
END;
PROCEDURE Optimize;
VAR i,j:INTEGER;
BEGIN
FOR i:=0 TO m DO F[i,0]:=-1;
FOR j:=0 TO n DO F[0,j]:=-1;
F[0,1]:=0;
FOR i:=1 TO m DO
FOR j:=1 TO n DO
F[i,j]:=2*Max(F[i,j-1],F[i-1,j])+A[i,j];
END;
PROCEDURE Trace(i,j:INTEGER);
BEGINIF (i=1) AND (j=1) THEN
writeln(F[m,n])
ELSE
BEGIN
IF F[i,j-1]>F[i-1,j] THEN
Trace(i,j-1)
ELSE
Trace(i-1,j);
writeln(i,' ',j);
END;
END;
BEGIN
Assign(Input,'Robot.inp'); Reset(Input);
Assign(Output,'Robot.out');Rewrite(Output);
Enter;
Optimize;
Trace(m,n);
close(Input);
close(Output);
END.
Em hiểu,nhưng cách anh chỉ đến 8 chữ số là cùng.
Cách em thì chỉ cần lấy int64(em dùng luôn mấy biến real vì bự hơn) thì chấp 10^30
