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我晕,这样的程序都能AC输入数据竟然都没有重叠区间
program poj2665;
var
l,a,b:longint;
m,i:integer;
begin
readln(l,m);
while l<>0 do
begin
l:=l+1;
for i:=1 to m do
begin
readln(a,b);
l:=l-b+a-1;
end;
writeln(l);
readln(l,m);
end;
end.
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