#include <bits/stdc++.h>   using namespace std;   template <class T>   inline T sqr(const T &x) {     return x * x;   }   inline long long sqr(int x) { return sqr<long long>(x); }   template <class T>   T binpow(const T &a, long long n) {     return n == 0 ? 1 : sqr(binpow(a, n / 2)) * (n % 2 ? a : 1);   }   long long binpow(long long a, long long n, long long modulo) {     return n == 0 ? 1                   : sqr(binpow(a, n / 2, modulo)) % modulo * (n % 2 ? a : 1) %                         modulo;   }   long long gcd(long long a, long long b, long long &x, long long &y) {     if (a == 0) {       x = 0;       y = 1;       return b;     }     long long x1, y1;     long long d = gcd(b % a, a, x1, y1);     x = y1 - (b / a) * x1;     y = x1;     return d;   }   inline long long phi(long long n) {     long long result = n;     for (long long i = 2; i * i <= n; ++i)       if (n % i == 0) {         while (n % i == 0) n /= i;         result -= result / i;       }     if (n > 1) result -= result / n;     return result;   }   inline vector<long long> inverseAll(long long m) {     vector<long long> r(m);     r[1] = 1;     for (int i = 2; i < m; ++i) r[i] = (m - (m / i) * r[m % i] % m) % m;     return r;   }   inline long long gcd(long long a, long long b) { return gcd(a, b, a, b); }   inline long long lcm(long long a, long long b) { return a / gcd(a, b) * b; }   inline long long llrand() {     const long long lsbToFill = (sizeof(long long) << 3) - 1;     const long long bitsFilledInIteration = __builtin_popcountll(RAND_MAX);     long long number = 0;     for (long long lsbFilled = 0; lsbFilled <= lsbToFill;          lsbFilled += bitsFilledInIteration) {       number ^= (((long long)rand()) << lsbFilled);     }     return number & numeric_limits<long long>::max();   }   inline long long llrand(long long begin, long long end) {     return begin + llrand() % (end - begin);   }   struct Dinic {     struct Edge {       int u, v;       long long cap, flow;       Edge() {}       Edge(int u, int v, long long cap) : u(u), v(v), cap(cap), flow(0) {}     };     int N;     vector<Edge> E;     vector<vector<int>> g;     vector<int> d, pt;     Dinic(int N) : N(N), E(0), g(N), d(N), pt(N) {}     void AddEdge(int u, int v, long long cap) {       if (u != v) {         E.emplace_back(Edge(u, v, cap));         g[u].emplace_back(E.size() - 1);         E.emplace_back(Edge(v, u, 0));         g[v].emplace_back(E.size() - 1);       }     }     bool BFS(int S, int T) {       queue<int> q({S});       fill(d.begin(), d.end(), N + 1);       d[S] = 0;       while (!q.empty()) {         int u = q.front();         q.pop();         if (u == T) break;         for (int k : g[u]) {           Edge &e = E[k];           if (e.flow < e.cap && d[e.v] > d[e.u] + 1) {             d[e.v] = d[e.u] + 1;             q.emplace(e.v);           }         }       }       return d[T] != N + 1;     }     long long DFS(int u, int T, long long flow = -1) {       if (u == T || flow == 0) return flow;       for (int &i = pt[u]; i < g[u].size(); ++i) {         Edge &e = E[g[u][i]];         Edge &oe = E[g[u][i] ^ 1];         if (d[e.v] == d[e.u] + 1) {           long long amt = e.cap - e.flow;           if (flow != -1 && amt > flow) amt = flow;           if (long long pushed = DFS(e.v, T, amt)) {             e.flow += pushed;             oe.flow -= pushed;             return pushed;           }         }       }       return 0;     }     long long MaxFlow(int S, int T) {       long long total = 0;       while (BFS(S, T)) {         fill(pt.begin(), pt.end(), 0);         while (long long flow = DFS(S, T)) total += flow;       }       return total;     }   };   vector<long long> Dijkstra(const vector<list<pair<int, long long>>> &g, int s) {     vector<long long> d(int((g).size()), numeric_limits<long long>::max() / 2LL);     priority_queue<pair<long long, int>> q;     d[s] = 0;     q.emplace(-0, s);     while (!q.empty()) {       while (q.top().first > d[q.top().second]) {         q.pop();       }       int v = q.top().second;       q.pop();       for (const auto &cw : g[v]) {         if (d[v] + cw.second < d[cw.first]) {           d[cw.first] = d[v] + cw.second;           q.emplace(-d[cw.first], cw.first);         }       }     }     return d;   }   struct BinarySearchIterator       : public std::iterator<std::forward_iterator_tag, bool> {     long long value;     typename iterator_traits<BinarySearchIterator>::difference_type operator-(         const BinarySearchIterator &it) const {       return value - it.value;     }     BinarySearchIterator &operator++() {       ++value;       return *this;     }     bool operator!=(const BinarySearchIterator &it) const {       return value != it.value;     }     bool operator*() const { return true; }   };   template <int ALPHA>   class AhoCorasick {    public:     static const int ILLEGAL_INDEX;     static const int ROOT;     struct Node {       bool leaf;       int parent;       int parentCharacter;       int link;       int next[ALPHA];       int go[ALPHA];       int outputFunction;       Node(int parent = ILLEGAL_INDEX, int parentCharacter = ALPHA)           : leaf(false),             parent(parent),             parentCharacter(parentCharacter),             link(ILLEGAL_INDEX),             outputFunction(ILLEGAL_INDEX) {         fill_n(next, ALPHA, ILLEGAL_INDEX);         fill_n(go, ALPHA, ILLEGAL_INDEX);       }     };     vector<Node> tree = vector<Node>(1);     AhoCorasick() {}     AhoCorasick(int maxStatesNumber) { tree.reserve(maxStatesNumber); }     template <class Iterator>     void add(int length, const Iterator begin) {       int vertex = ROOT;       for (int i = 0; i < length; ++i) {         if (ILLEGAL_INDEX == tree[vertex].next[begin[i]]) {           tree[vertex].next[begin[i]] = int((tree).size());           tree.push_back(Node(vertex, begin[i]));         }         vertex = tree[vertex].next[begin[i]];       }       tree[vertex].leaf = true;     }     int getLink(int vertex) {       assert(0 <= vertex && vertex < tree.size());       if (ILLEGAL_INDEX == tree[vertex].link) {         if (ROOT == vertex || ROOT == tree[vertex].parent) {           tree[vertex].link = ROOT;         } else {           tree[vertex].link =               go(getLink(tree[vertex].parent), tree[vertex].parentCharacter);         }       }       return tree[vertex].link;     }     int go(int vertex, int character) {       assert(0 <= character && character < ALPHA);       assert(0 <= vertex && vertex < tree.size());       if (ILLEGAL_INDEX == tree[vertex].go[character]) {         if (ILLEGAL_INDEX == tree[vertex].next[character]) {           tree[vertex].go[character] =               ROOT == vertex ? ROOT : go(getLink(vertex), character);         } else {           tree[vertex].go[character] = tree[vertex].next[character];         }       }       return tree[vertex].go[character];     }     int getOutputFunction(int vertex) {       assert(0 <= vertex && vertex < tree.size());       if (ILLEGAL_INDEX == tree[vertex].outputFunction) {         if (tree[vertex].leaf || ROOT == vertex) {           tree[vertex].outputFunction = vertex;         } else {           tree[vertex].outputFunction = getOutputFunction(getLink(vertex));         }       }       return tree[vertex].outputFunction;     }   };   template <int ALPHA>   const int AhoCorasick<ALPHA>::ILLEGAL_INDEX = -1;   template <int ALPHA>   const int AhoCorasick<ALPHA>::ROOT = 0;   int main(int argc, const char *argv[]) {     ios::sync_with_stdio(false);     cin.tie(0);     srand((unsigned int)time(NULL));     int n;     while (cin >> n) {       vector<long long> s(n);       for (int i = (0); i < (n); ++i) {         cin >> s[i];       }       vector<long long> ps(n + 1, 0);       partial_sum((s).begin(), (s).end(), ps.begin() + 1);       int q;       cin >> q;       for (int i = (0); i < (q); ++i) {         int l, r;         cin >> l >> r;         --l;         --r;         cout << (ps[r + 1] - ps[l]) / 10 << endl;       }     }     return 0;   }