test/verify/yosupo-static-range-sum.test.cpp

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Last update: 2022-09-11 00:53:50+09:00
Problem: https://judge.yosupo.jp/problem/static_range_sum
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Code

#define PROBLEM "https://judge.yosupo.jp/problem/static_range_sum"

#include "../../template/template.hpp"

#include "../../dp/cumulative-sum.hpp"

int main() {
  int n, q;
  cin >> n >> q;
  CumulativeSum< int64 > cs(n);
  for(int i = 0; i < n; i++) {
    int x;
    cin >> x;
    cs.add(i, x);
  }
  cs.build();
  for(int i = 0; i < q; i++) {
    int l, r;
    cin >> l >> r;
    cout << cs.fold(l, r) << "\n";
  }
}

#line 1 "test/verify/yosupo-static-range-sum.test.cpp"
#define PROBLEM "https://judge.yosupo.jp/problem/static_range_sum"

#line 1 "template/template.hpp"
#include<bits/stdc++.h>

using namespace std;

using int64 = long long;
const int mod = 1e9 + 7;

const int64 infll = (1LL << 62) - 1;
const int inf = (1 << 30) - 1;

struct IoSetup {
  IoSetup() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(10);
    cerr << fixed << setprecision(10);
  }
} iosetup;

template< typename T1, typename T2 >
ostream &operator<<(ostream &os, const pair< T1, T2 >& p) {
  os << p.first << " " << p.second;
  return os;
}

template< typename T1, typename T2 >
istream &operator>>(istream &is, pair< T1, T2 > &p) {
  is >> p.first >> p.second;
  return is;
}

template< typename T >
ostream &operator<<(ostream &os, const vector< T > &v) {
  for(int i = 0; i < (int) v.size(); i++) {
    os << v[i] << (i + 1 != v.size() ? " " : "");
  }
  return os;
}

template< typename T >
istream &operator>>(istream &is, vector< T > &v) {
  for(T &in : v) is >> in;
  return is;
}

template< typename T1, typename T2 >
inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }

template< typename T1, typename T2 >
inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }

template< typename T = int64 >
vector< T > make_v(size_t a) {
  return vector< T >(a);
}

template< typename T, typename... Ts >
auto make_v(size_t a, Ts... ts) {
  return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...));
}

template< typename T, typename V >
typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) {
  t = v;
}

template< typename T, typename V >
typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) {
  for(auto &e : t) fill_v(e, v);
}

template< typename F >
struct FixPoint : F {
  explicit FixPoint(F &&f) : F(forward< F >(f)) {}

  template< typename... Args >
  decltype(auto) operator()(Args &&... args) const {
    return F::operator()(*this, forward< Args >(args)...);
  }
};
 
template< typename F >
inline decltype(auto) MFP(F &&f) {
  return FixPoint< F >{forward< F >(f)};
}
#line 4 "test/verify/yosupo-static-range-sum.test.cpp"

#line 1 "dp/cumulative-sum.hpp"
template< class T >
struct CumulativeSum {
  vector< T > data;

  CumulativeSum() = default;

  explicit CumulativeSum(size_t sz) : data(sz + 1, 0) {}

  void add(int k, const T &x) {
    data[k + 1] += x;
  }

  void build() {
    for(int i = 1; i < data.size(); i++) {
      data[i] += data[i - 1];
    }
  }

  T fold(int r) const {
    if(r < 0) return 0;
    return data[min(r, (int) data.size() - 1)];
  }

  T fold(int l, int r) const {
    return fold(r) - fold(l);
  }
};
#line 6 "test/verify/yosupo-static-range-sum.test.cpp"

int main() {
  int n, q;
  cin >> n >> q;
  CumulativeSum< int64 > cs(n);
  for(int i = 0; i < n; i++) {
    int x;
    cin >> x;
    cs.add(i, x);
  }
  cs.build();
  for(int i = 0; i < q; i++) {
    int l, r;
    cin >> l >> r;
    cout << cs.fold(l, r) << "\n";
  }
}