結果
| 問題 | No.860 買い物 |
| ユーザー |
 Pachicobue
|
| 提出日時 | 2019-08-09 22:55:24 |
| 言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
AC
|
| 実行時間 | 85 ms / 1,000 ms |
| コード長 | 7,146 bytes |
| コンパイル時間 | 2,274 ms |
| コンパイル使用メモリ | 207,848 KB |
| 実行使用メモリ | 10,368 KB |
| 最終ジャッジ日時 | 2024-07-19 15:17:34 |
| 合計ジャッジ時間 | 4,289 ms |
|
ジャッジサーバーID （参考情報） |
judge1 / judge3 |
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テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 2 ms
6,812 KB |
| testcase_01 | AC | 1 ms
6,944 KB |
| testcase_02 | AC | 2 ms
6,944 KB |
| testcase_03 | AC | 2 ms
6,940 KB |
| testcase_04 | AC | 2 ms
6,944 KB |
| testcase_05 | AC | 1 ms
6,940 KB |
| testcase_06 | AC | 4 ms
6,944 KB |
| testcase_07 | AC | 82 ms
10,240 KB |
| testcase_08 | AC | 80 ms
10,368 KB |
| testcase_09 | AC | 80 ms
10,368 KB |
| testcase_10 | AC | 80 ms
10,368 KB |
| testcase_11 | AC | 59 ms
10,228 KB |
| testcase_12 | AC | 61 ms
10,368 KB |
| testcase_13 | AC | 78 ms
10,240 KB |
| testcase_14 | AC | 79 ms
10,368 KB |
| testcase_15 | AC | 36 ms
10,240 KB |
| testcase_16 | AC | 62 ms
10,348 KB |
| testcase_17 | AC | 85 ms
10,368 KB |
ソースコード
#include <bits/stdc++.h>
#pragma GCC diagnostic ignored "-Wsign-compare"
#pragma GCC diagnostic ignored "-Wsign-conversion"
#define NDEBUG
#define SHOW(...) static_cast<void>(0)
//!===========================================================!//
//! dP dP dP !//
//! 88 88 88 !//
//! 88aaaaa88a .d8888b. .d8888b. .d888b88 .d8888b. 88d888b. !//
//! 88 88 88ooood8 88' '88 88' '88 88ooood8 88' '88 !//
//! 88 88 88. ... 88. .88 88. .88 88. ... 88 !//
//! dP dP '88888P' '88888P8 '88888P8 '88888P' dP !//
//!===========================================================!//
template <typename T>
T read()
{
T v;
return std::cin >> v, v;
}
template <typename T>
std::vector<T> readVec(const std::size_t l)
{
std::vector<T> v(l);
for (auto& e : v) { std::cin >> e; }
return v;
}
using ld = long double;
using uint = unsigned int;
using ll = long long;
using ull = unsigned long long;
constexpr unsigned int MOD = 1000000007;
template <typename T>
constexpr T INF = std::numeric_limits<T>::max() / 4;
template <typename F>
constexpr F PI = static_cast<F>(3.1415926535897932385);
std::mt19937 mt{std::random_device{}()};
template <typename T>
bool chmin(T& a, const T& b) { return (a > b ? a = b, true : false); }
template <typename T>
bool chmax(T& a, const T& b) { return (a < b ? a = b, true : false); }
template <typename T>
std::vector<T> Vec(const std::size_t n, T v) { return std::vector<T>(n, v); }
template <class... Args>
auto Vec(const std::size_t n, Args... args) { return std::vector<decltype(Vec(args...))>(n, Vec(args...)); }
template <typename T>
constexpr T popCount(const T u)
{
#ifdef __has_builtin
return u == 0 ? T(0) : (T)__builtin_popcountll(u);
#else
unsigned long long v = static_cast<unsigned long long>(u);
return v = (v & 0x5555555555555555ULL) + (v >> 1 & 0x5555555555555555ULL), v = (v & 0x3333333333333333ULL) + (v >> 2 & 0x3333333333333333ULL), v = (v + (v >> 4)) & 0x0F0F0F0F0F0F0F0FULL, static_cast<T>(v * 0x0101010101010101ULL >> 56 & 0x7f);
#endif
}
template <typename T>
constexpr T log2p1(const T u)
{
#ifdef __has_builtin
return u == 0 ? T(0) : T(64 - __builtin_clzll(u));
#else
unsigned long long v = static_cast<unsigned long long>(u);
return v = static_cast<unsigned long long>(v), v |= (v >> 1), v |= (v >> 2), v |= (v >> 4), v |= (v >> 8), v |= (v >> 16), v |= (v >> 32), popCount(v);
#endif
}
template <typename T>
constexpr T clog(const T v) { return v == 0 ? T(0) : log2p1(v - 1); }
template <typename T>
constexpr T msbp1(const T v) { return log2p1(v); }
template <typename T>
constexpr T lsbp1(const T v)
{
#ifdef __has_builtin
return __builtin_ffsll(v);
#else
return v == 0 ? T(0) : popCount((v & (-v)) - T(1)) + T(1);
#endif
}
template <typename T>
constexpr bool ispow2(const T v) { return popCount(v) == 1; }
template <typename T>
constexpr T ceil2(const T v) { return v == 0 ? T(1) : T(1) << log2p1(v - 1); }
template <typename T>
constexpr T floor2(const T v) { return v == 0 ? T(0) : T(1) << (log2p1(v) - 1); }
//!===================================================================!//
//! .d88888b d888888P !//
//! 88. "' 88 !//
//! 'Y88888b. .d8888b. .d8888b. 88 88d888b. .d8888b. .d8888b. !//
//! '8b 88ooood8 88' '88 88 88' '88 88ooood8 88ooood8 !//
//! d8' .8P 88. ... 88. .88 88 88 88. ... 88. ... !//
//! Y88888P '88888P' '8888P88 dP dP '88888P' '88888P' !//
//! .88 !//
//! d8888P !//
//!===================================================================!//
template <typename ValMonoid>
class SegTree
{
public:
using ValType = typename ValMonoid::ValType;
SegTree(const std::size_t N, const ValType initial = ValMonoid::id()) : size(N), half(ceil2(size)), val(half << 1, ValMonoid::id())
{
if (initial != ValMonoid::id()) {
std::fill(val.begin() + half, val.end(), initial);
for (std::size_t i = half - 1; i >= 1; i--) { up(i); }
}
}
template <typename InIt>
SegTree(const InIt first, const InIt last) : size(std::distance(first, last)), half(ceil2(size)), val(half << 1, ValMonoid::id())
{
std::copy(first, last, val.begin() + half);
for (std::size_t i = half - 1; i >= 1; i--) { up(i); }
}
ValType get(const std::size_t a) const { return assert(a < size), val[a + half]; }
void set(std::size_t a, const ValType& v)
{
assert(a < size);
val[a += half] = v;
while (a >>= 1) { up(a); }
}
ValType fold(std::size_t L, std::size_t R) const
{
assert(L < R), assert(R <= size);
ValType accl = ValMonoid::id(), accr = ValMonoid::id();
for (L += half, R += half; L < R; L >>= 1, R >>= 1) {
if (L & 1) { accl = acc(accl, val[L++]); }
if (R & 1) { accr = acc(val[--R], accr); }
}
return acc(accl, accr);
}
friend std::ostream& operator<<(std::ostream& os, const SegTree& seg)
{
os << "[";
for (std::size_t i = seg.half; i < seg.half + seg.size; i++) { os << seg.val[i] << (i + 1 == seg.half + seg.size ? "" : ","); }
return (os << "]\n");
}
private:
void up(const std::size_t i) { val[i] = acc(val[i << 1], val[i << 1 | 1]); }
const std::size_t size, half;
std::vector<ValType> val;
const ValMonoid acc{};
};
//!============================!//
//! 8888ba.88ba oo !//
//! 88 '8b '8b !//
//! 88 88 88 dP 88d888b. !//
//! 88 88 88 88 88' '88 !//
//! 88 88 88 88 88 88 !//
//! dP dP dP dP dP dP !//
//!============================!//
template <typename Elemtype>
struct Min
{
using ValType = Elemtype;
ValType operator()(const ValType& a, const ValType& b) const { return std::min(a, b); }
static constexpr ValType id() { return std::numeric_limits<ValType>::max(); }
};
//!=====================================!//
//! 8888ba.88ba oo !//
//! 88 '8b '8b !//
//! 88 88 88 .d8888b. dP 88d888b. !//
//! 88 88 88 88' '88 88 88' '88 !//
//! 88 88 88 88. .88 88 88 88 !//
//! dP dP dP '88888P8 dP dP dP !//
//!=====================================!//
int main()
{
const int N = read<int>();
std::vector<ll> C(N), D(N);
ll ans = 0;
for (int i = 0; i < N; i++) { std::cin >> C[i] >> D[i], ans += C[i] + D[i]; }
auto dp = Vec(N, 3, INF<ll>);
dp[0][0] = 0;
for (int i = 0; i < N; i++) {
chmin(dp[i][1], dp[i][0] - D[i]);
chmin(dp[i][2], dp[i][1] + C[i]);
if (i < N - 1) {
chmin(dp[i + 1][0], dp[i][2]);
chmin(dp[i + 1][1], dp[i][1]);
chmin(dp[i + 1][2], dp[i][2]);
}
}
std::cout << ans + dp[N - 1][2] << std::endl;
return 0;
}