#include using namespace std; #define rep(i, n) for(int i = 0; i < n; i++) #define rep2(i, x, n) for(int i = x; i <= n; i++) #define rep3(i, x, n) for(int i = x; i >= n; i--) #define each(e, v) for(auto &e: v) #define pb push_back #define eb emplace_back #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define sz(x) (int)x.size() using ll = long long; using pii = pair; using pil = pair; using pli = pair; using pll = pair; const int MOD = 924844033; //const int MOD = 998244353; const int inf = (1<<30)-1; const ll INF = (1LL<<60)-1; template bool chmax(T &x, const T &y) {return (x < y)? (x = y, true) : false;}; template bool chmin(T &x, const T &y) {return (x > y)? (x = y, true) : false;}; struct io_setup{ io_setup(){ ios_base::sync_with_stdio(false); cin.tie(NULL); cout << fixed << setprecision(15); } } io_setup; template struct Mod_Int{ int x; Mod_Int() : x(0) {} Mod_Int(long long y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {} Mod_Int &operator += (const Mod_Int &p){ if((x += p.x) >= mod) x -= mod; return *this; } Mod_Int &operator -= (const Mod_Int &p){ if((x += mod - p.x) >= mod) x -= mod; return *this; } Mod_Int &operator *= (const Mod_Int &p){ x = (int) (1LL * x * p.x % mod); return *this; } Mod_Int &operator /= (const Mod_Int &p){ *this *= p.inverse(); return *this; } Mod_Int &operator ++ () {return *this += Mod_Int(1);} Mod_Int operator ++ (int){ Mod_Int tmp = *this; ++*this; return tmp; } Mod_Int &operator -- () {return *this -= Mod_Int(1);} Mod_Int operator -- (int){ Mod_Int tmp = *this; --*this; return tmp; } Mod_Int operator - () const {return Mod_Int(-x);} Mod_Int operator + (const Mod_Int &p) const {return Mod_Int(*this) += p;} Mod_Int operator - (const Mod_Int &p) const {return Mod_Int(*this) -= p;} Mod_Int operator * (const Mod_Int &p) const {return Mod_Int(*this) *= p;} Mod_Int operator / (const Mod_Int &p) const {return Mod_Int(*this) /= p;} bool operator == (const Mod_Int &p) const {return x == p.x;} bool operator != (const Mod_Int &p) const {return x != p.x;} Mod_Int inverse() const{ assert(*this != Mod_Int(0)); return pow(mod-2); } Mod_Int pow(long long k) const{ Mod_Int now = *this, ret = 1; for(; k > 0; k >>= 1, now *= now){ if(k&1) ret *= now; } return ret; } friend ostream &operator << (ostream &os, const Mod_Int &p){ return os << p.x; } friend istream &operator >> (istream &is, Mod_Int &p){ long long a; is >> a; p = Mod_Int(a); return is; } }; using mint = Mod_Int; int main(){ string S; cin >> S; int N = sz(S); S += '1'; vector cnt, ids; int ptr = 0; while(ptr <= N){ int j = 0; while(ptr+j <= N && S[ptr+j] == '0') j++; ptr += j; cnt.eb(j), ids.eb(ptr); ptr++; } int K = sz(ids); //rep(i, K) cout << cnt[i] << ' ' << ids[i] << '\n'; if(K == 1){ cout << N << '\n'; return 0; } vector>> p(K-1); vector v; vector tmp; rep3(i, K-2, 0){ while(!empty(v) && cnt[v.back()] <= cnt[i]){ int t = v.back(); auto [r, c] = tmp.back(); v.pop_back(), tmp.pop_back(); p[t].eb(i, r, c); } if(!empty(v)){ int t = v.back(); auto [r, c] = tmp.back(); p[t].eb(i, r, c); tmp.back().first = i; tmp.back().second = cnt[t]-cnt[i]; } v.eb(i); tmp.eb(i, cnt[i]+1); } rep(i, sz(v)){ int t = v[i]; auto [r, c] = tmp[i]; p[t].eb(0, r, c); } vector dp(K-1, 0); vector s(K, 0); dp[0] = cnt[0]+1; s[1] = dp[0]; rep2(i, 1, K-2){ int pre = -1; each(e, p[i]){ auto [l, r, c] = e; dp[i] += (s[r]-s[l])*c; } s[i+1] = s[i]+dp[i]; } //rep(i, K-1) cout << dp[i] << ' '; cout << '\n'; cout << accumulate(all(dp), mint(0))*(cnt[K-1]+1) << '\n'; }