ifstream cin("lifeguards.in");
ofstream cout("lifeguards.out");
int t; cin >> t;
pair <int, int> time[t];
int max = 0;
for (int i = 0; i < t; ++i)
{
cin >> time[i].first >> time[i].second;
}
for (int i = 0; i < t; ++i)
{
int arr[1001] = {0};
for (int j = 0; j < t; ++j)
{
if (i != j){
for (int k = time[j].first; k <= time[j].second; ++k)
{
arr[k]++;
}
}
}
int ans = 0;
for (int o = 0; o < 1001; ++o)
{
if (arr[o] > 0) {
ans ++;
if (ans > max) max = ans;
}
else ans = 0;
}
}
cout << max;
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}