結果

問題 No.754 畳み込みの和
ユーザー mai
提出日時 2018-12-02 00:13:58
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 10 ms / 5,000 ms
コード長 6,835 bytes
コンパイル時間 2,380 ms
コンパイル使用メモリ 211,512 KB
最終ジャッジ日時 2025-01-06 17:49:55
ジャッジサーバーID
(参考情報)
judge3 / judge2
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ファイルパターン 結果
other AC * 3
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ソースコード

diff #
プレゼンテーションモードにする

#pragma GCC optimize ("O3")
#include "bits/stdc++.h"
using namespace std;
using ll = long long int;
#define debugos cout
#define debug(v) {printf("L%d %s > ",__LINE__,#v);debugos<<(v)<<endl;}
#define debugv(v) {printf("L%d %s > ",__LINE__,#v);for(auto e:(v)){debugos<<e<<" ";}debugos<<endl;}
#define debuga(m,w) {printf("L%d %s > ",__LINE__,#m);for(int x=0;x<(w);x++){debugos<<(m)[x]<<" ";}debugos<<endl;}
#define debugaa(m,h,w) {printf("L%d %s >\n",__LINE__,#m);for(int y=0;y<(h);y++){for(int x=0;x<(w);x++){debugos<<(m)[y][x]<<" ";}debugos<<endl;}}
#define ALL(v) (v).begin(),(v).end()
#define repeat(cnt,l) for(auto cnt=decltype(l)();(cnt)<(l);++(cnt))
#define rrepeat(cnt,l) for(auto cnt=(l)-1;0<=(cnt);--(cnt))
#define iterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);++(cnt))
#define diterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);--(cnt))
const ll MD = 1000000007ll; const long double PI = 3.1415926535897932384626433832795L;
inline void assert_call(bool assertion, function<void()> f) { if (!assertion) { cerr << "assertion fault:" << endl; f(); abort(); } }
template<typename T1, typename T2> inline ostream& operator <<(ostream &o, const pair<T1, T2> p) { o << '(' << p.first << ':' << p.second << ')';
    return o; }
template<typename Vec> inline ostream& _ostream_vecprint(ostream& os, const Vec& a) {
os << '['; for (const auto& e : a) os << ' ' << e << ' '; os << ']'; return os;
}
template<typename T> inline ostream& operator<<(ostream& o, const vector<T>& v) { return _ostream_vecprint(o, v); }
template<typename T, size_t S> inline ostream& operator<<(ostream& o, const array<T, S>& v) { return _ostream_vecprint(o, v); }
template<typename T> inline T& chmax(T& to, const T& val) { return to = max(to, val); }
template<typename T> inline T& chmin(T& to, const T& val) { return to = min(to, val); }
void bye(string s, int code = 0) { cout << s << endl; exit(code); }
mt19937_64 randdev(8901016);
template<typename T, typename Random = decltype(randdev), typename enable_if<is_integral<T>::value>::type* = nullptr>
inline T rand(T l, T h, Random& rand = randdev) { return uniform_int_distribution<T>(l, h)(rand); }
template<typename T, typename Random = decltype(randdev), typename enable_if<is_floating_point<T>::value>::type* = nullptr>
inline T rand(T l, T h, Random& rand = randdev) { return uniform_real_distribution<T>(l, h)(rand); }
#if defined(_WIN32) || defined(_WIN64)
#define getchar_unlocked _getchar_nolock
#define putchar_unlocked _putchar_nolock
#elif defined(__GNUC__)
#else
#define getchar_unlocked getchar
#define putchar_unlocked putchar
#endif
namespace {
#define isvisiblechar(c) (0x21<=(c)&&(c)<=0x7E)
class MaiScanner {
public:
template<typename T> void input_integer(T& var) noexcept {
var = 0; T sign = 1;
int cc = getchar_unlocked();
for (; cc < '0' || '9' < cc; cc = getchar_unlocked())
if (cc == '-') sign = -1;
for (; '0' <= cc && cc <= '9'; cc = getchar_unlocked())
var = (var << 3) + (var << 1) + cc - '0';
var = var * sign;
}
inline int c() noexcept { return getchar_unlocked(); }
inline MaiScanner& operator>>(int& var) noexcept { input_integer<int>(var); return *this; }
inline MaiScanner& operator>>(long long& var) noexcept { input_integer<long long>(var); return *this; }
inline MaiScanner& operator>>(string& var) {
int cc = getchar_unlocked();
for (; !isvisiblechar(cc); cc = getchar_unlocked());
for (; isvisiblechar(cc); cc = getchar_unlocked())
var.push_back(cc);
return *this;
}
template<typename IT> inline void in(IT begin, IT end) { for (auto it = begin; it != end; ++it) *this >> *it; }
};
class MaiPrinter {
public:
template<typename T>
void output_integer(T var) noexcept {
if (var == 0) { putchar_unlocked('0'); return; }
if (var < 0)
putchar_unlocked('-'),
var = -var;
char stack[32]; int stack_p = 0;
while (var)
stack[stack_p++] = '0' + (var % 10),
var /= 10;
while (stack_p)
putchar_unlocked(stack[--stack_p]);
}
inline MaiPrinter& operator<<(char c) noexcept { putchar_unlocked(c); return *this; }
inline MaiPrinter& operator<<(int var) noexcept { output_integer<int>(var); return *this; }
inline MaiPrinter& operator<<(long long var) noexcept { output_integer<long long>(var); return *this; }
inline MaiPrinter& operator<<(char* str_p) noexcept { while (*str_p) putchar_unlocked(*(str_p++)); return *this; }
inline MaiPrinter& operator<<(const string& str) {
const char* p = str.c_str();
const char* l = p + str.size();
while (p < l) putchar_unlocked(*p++);
return *this;
}
template<typename IT> void join(IT begin, IT end, char sep = ' ') { for (bool b = 0; begin != end; ++begin, b = 1) b ? *this << sep << *begin
            : *this << *begin; }
};
}
MaiScanner scanner;
MaiPrinter printer;
template<int MaxN, long long Mod>
class Combinatorics {
using value_type = long long;
value_type fact_[MaxN + 1];
// value_type inv_[MaxN + 1]; // iranai
public:
value_type pow(value_type x, value_type p) {
value_type y = 1; x = x % Mod;
for (; 0 < p; p >>= 1) {
if (p & 1) y = y * x % Mod;
x = x * x % Mod;
}
return y;
}
Combinatorics() :fact_() {
fact_[0] = 1;
fact_[1] = 1;
for (value_type n = 2; n <= MaxN; ++n)
fact_[n] = (fact_[n - 1] * n) % Mod;
// inv_[Max] := calculate;
// iterate => inv_[i] = inv_[i+1] * (i+1) % MD;
}
inline value_type fact(int n) const {
return fact_[n];
}
inline value_type inv(value_type n) {
return pow(n, MD - 2);
}
inline value_type nPr(value_type n, value_type r) {
if (r < 0 || n < r) return 0;
return fact_[n] * inv(fact_[n - r]) % MD;
}
inline value_type nCr(value_type n, value_type r) {
if (n < r) return 0;
return ((fact_[n] * inv(fact_[n - r]) % MD) * inv(fact_[r])) % MD;
}
inline value_type nHr(value_type n, value_type r) {
if (n == 0 && r == 0) return 1;
if (n == 0) return 0;
return nCr(n - 1 + r, n - 1);
}
};
Combinatorics<100010, MD> combi;
ll N;
ll A[100010], B[100010];
int main() {
scanner >> N;
N += 1;
scanner.in(A, A + N);
scanner.in(B, B + N);
ll ans = 0;
ll sum = 0;
repeat(i, N) {
sum += B[i];
ans += sum * A[N - i - 1];
sum %= MD;
ans %= MD;
}
cout << ans << endl;
return 0;
}
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