BABA
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#include <bits/stdc++.h>
using namespace std;
// type
typedef long long ll;
typedef long double ld;
// loop
//#define For(i, l, r, x) for (int i = l; i < r; i+=x)
//#define ForE(i, l, r, x) for (int i = l; i <= r; i+=x)
//#define Ford(i, r, l) for (int i = r; i > l; i--)
//#define FordE(i, r, l) for (int i = r; i >= l; i--)
//#define Fora(i, a) for (auto i : a)
// I/O
#define FAST_IO std::ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
//#define PrintV(a) Fora(ii, a) cout << ii << ' '; cout << rl;
//#define PrintVl(a) Fora(ii, a) cout << ii << rl;
//#define PrintA(a, l, r) for (int ii = l; ii <= r; ii++) cout << a[ii] << ' '; cout << rl;
//#define PrintAl(a, l, r) for (int ii = l; ii <= r; ii++) cout << a[ii] << rl;
//#define Ptest(x) return cout << x, 0;
#define setpre(n) fixed << setprecision(n)
// pair
#define F first
#define S second
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pdd pair<ld, ld>
// vector & !!?(string)
#define eb emplace_back
#define pb push_back
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define sz(a) a.size()
#define len(a) a.length()
// geometry calc
#define pi acos(-1.0)
#define g_sin(a) sin(a*pi/180)
#define g_cos(a) cos(a*pi/180)
#define g_tan(a) tan(a*pi/180)
// set val
#define ms0(a) memset(a, 0, sizeof(a));
#define ms1(a) memset(a, 1, sizeof(a));
#define msn1(a) memset(a, -1, sizeof(a));
#define msinf(a) memset(a, 0x3f3f3f, sizeof(a));
// constant
const int mod1 = 998244353, mod = 1e9+7;
const int MAX_N = 100005, MAX_M = 200010;
// code
//#define int long long
int arr[(int) 1e7 + 1];
int par[33], v;
void get(string &a, string s){
if (s.length() > a.length()) {a = s; return;}
else if (s.length() != a.length()) return;
for (int i = 0; i < a.length(); i++){
if (a[i] < s[i]) {a = s; return;}
else if (a[i] > s[i]) return;
}
}
void Solve() {
string s;
cin >> s >> v;
for (int i = 0; i < s.length(); i++){
arr[i+1] = (arr[i] * 10 + s[i] - '0') % 33;
}
for (int i = 0; i < 33; i++){
par[i] = i*10 % 33;
//cout << i << ' ' << par[i] << endl;
}
//for (int i = 0; i <= s.length(); i++) cout << arr[i] << ' '; cout << endl;
if (v == 1){
map<int, int> cnt;
int ans = 0;
for (int i = 0; i <= s.length(); i++){
int val = arr[i];
if (cnt.count(par[val])){
ans += cnt[par[val]];
}
cnt[val] ++;
}
cout << ans;
}else{
map<int, int> idx;
string ans = "";
for (int i = 0; i <= s.length(); i++){
int val = arr[i];
if (idx.count(par[val])){
string t = s.substr(idx[par[val]], i - idx[par[val]]);
get(ans, t);
}
idx[val] = i;
}
cout << ans;
}
}
signed main(){
FAST_IO;
int TC = 1;
//cin >> TC;
while(TC--) Solve();
return 0;
}
Cpp
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