Submission #8388020
Source Code Expand
#include <bits/stdc++.h>
// created [2019/11/10] 22:27:30
#pragma GCC diagnostic ignored "-Wsign-compare"
#pragma GCC diagnostic ignored "-Wsign-conversion"
using i32 = int32_t;
using i64 = int64_t;
using u32 = uint32_t;
using u64 = uint64_t;
using uint = unsigned int;
using usize = std::size_t;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
template<typename T> constexpr T popcount(const T u) { return u ? static_cast<T>(__builtin_popcountll(static_cast<u64>(u))) : static_cast<T>(0); }
template<typename T> constexpr T log2p1(const T u) { return u ? static_cast<T>(64 - __builtin_clzll(static_cast<u64>(u))) : static_cast<T>(0); }
template<typename T> constexpr T msbp1(const T u) { return log2p1(u); }
template<typename T> constexpr T lsbp1(const T u) { return __builtin_ffsll(u); }
template<typename T> constexpr T clog(const T u) { return u ? log2p1(u - 1) : static_cast<T>(u); }
template<typename T> constexpr bool ispow2(const T u) { return u and (static_cast<u64>(u) & static_cast<u64>(u - 1)) == 0; }
template<typename T> constexpr T ceil2(const T u) { return static_cast<T>(1) << clog(u); }
template<typename T> constexpr T floor2(const T u) { return u == 0 ? static_cast<T>(0) : static_cast<T>(1) << (log2p1(u) - 1); }
template<typename T> constexpr bool btest(const T mask, const usize ind) { return static_cast<bool>((static_cast<u64>(mask) >> ind) & static_cast<u64>(1)); }
template<typename T> void bset(T& mask, const usize ind) { mask |= (static_cast<T>(1) << ind); }
template<typename T> void breset(T& mask, const usize ind) { mask &= ~(static_cast<T>(1) << ind); }
template<typename T> void bflip(T& mask, const usize ind) { mask ^= (static_cast<T>(1) << ind); }
template<typename T> void bset(T& mask, const usize ind, const bool b) { (b ? bset(mask, ind) : breset(mask, ind)); }
template<typename T> constexpr T bcut(const T mask, const usize ind) { return ind == 0 ? static_cast<T>(0) : static_cast<T>((static_cast<u64>(mask) << (64 - ind)) >> (64 - ind)); }
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); }
constexpr unsigned int mod = 1000000007;
template<typename T> constexpr T inf_v = std::numeric_limits<T>::max() / 4;
template<typename Real> constexpr Real pi_v = Real{3.141592653589793238462643383279502884};
template<typename T>
T read()
{
T v;
return std::cin >> v, v;
}
template<typename T, typename... Args>
auto read(const usize size, Args... args)
{
std::vector<decltype(read<T>(args...))> ans(size);
for (usize i = 0; i < size; i++) { ans[i] = read<T>(args...); }
return ans;
}
template<typename... Types>
auto reads() { return std::tuple<std::decay_t<Types>...>{read<Types>()...}; }
# define SHOW(...) static_cast<void>(0)
template<typename T>
std::vector<T> make_v(const usize size, const T v) { return std::vector<T>(size, v); }
template<typename... Args>
auto make_v(const usize size, Args... args) { return std::vector<decltype(make_v(args...))>(size, make_v(args...)); }
int main()
{
const auto n = read<int>();
std::vector<bool> c(2 * n);
std::vector<usize> a(2 * n);
std::vector<usize> bs, ws;
usize w = 0, b = 0;
for (usize i = 0; i < 2 * n; i++) {
c[i] = (read<char>() == 'W'), a[i] = read<int>() - 1;
if (c[i]) {
w++, ws.push_back(a[i]);
} else {
b++, bs.push_back(a[i]);
}
}
ws.push_back(n), bs.push_back(n);
std::sort(ws.begin(), ws.end()), std::sort(bs.begin(), bs.end());
std::vector<usize> binv(n + 1), winv(n + 1); // (b_i)の場所,(w_i)の場所
for (usize i = 0; i < 2 * n; i++) { (c[i] ? winv : binv)[a[i]] = i; }
auto wcost = make_v(w + 1, b + 1, 0UL); // wcost[i][j] = 元の場所でw_iより右の[b_0,b_j),[w_0,w_i)の個数
auto bcost = make_v(w + 1, b + 1, 0UL); // bcost[i][j] = 元の場所でb_jより右の[b_0,b_j),[w_0,w_i)の個数
std::vector<usize> bord(n + 1), word(n + 1);
for (usize bi = 0; bi <= b; bi++) { bord[bs[bi]] = bi; }
for (usize wi = 0; wi <= w; wi++) { word[ws[wi]] = wi; }
for (usize wi = 0; wi <= w; wi++) {
const usize wpos = winv[ws[wi]];
for (usize j = wpos; j < 2 * n; j++) {
if (c[j]) {
if (a[j] < ws[wi]) { wcost[wi][0]++; }
} else {
const usize bo = bord[a[j]];
wcost[wi][bo + 1]++;
}
}
for (usize bi = 1; bi <= b; bi++) { wcost[wi][bi] += wcost[wi][bi - 1]; }
}
for (usize bi = 0; bi <= w; bi++) {
const usize bpos = binv[bs[bi]];
for (usize j = bpos; j < 2 * n; j++) {
if (c[j]) {
const usize wo = word[a[j]];
bcost[wo + 1][bi]++;
} else {
if (a[j] < bs[bi]) { bcost[0][bi]++; }
}
}
for (usize wi = 1; wi <= w; wi++) { bcost[wi][bi] += bcost[wi - 1][bi]; }
}
std::vector<usize> bvs(2 * n, n), wvs(2 * n, n);
for (usize i = 0; i < 2 * n; i++) { (c[i] ? wvs : bvs)[i] = a[i]; }
auto dp = make_v(w + 1, b + 1, inf_v<usize>);
dp[0][0] = 0;
for (usize wi = 0; wi <= w; wi++) {
for (usize bi = 0; bi <= b; bi++) {
if (wi + 1 <= w) { chmin(dp[wi + 1][bi], dp[wi][bi] + wcost[wi][bi]); }
if (bi + 1 <= b) { chmin(dp[wi][bi + 1], dp[wi][bi] + bcost[wi][bi]); }
}
}
std::cout << dp[w][b] << std::endl;
return 0;
}
Submission Info
Submission Time |
|
Task |
E - Sorted and Sorted |
User |
pachicobue |
Language |
C++14 (GCC 5.4.1) |
Score |
600 |
Code Size |
5684 Byte |
Status |
AC |
Exec Time |
194 ms |
Memory |
94464 KB |
Judge Result
Set Name |
Sample |
All |
Score / Max Score |
0 / 0 |
600 / 600 |
Status |
|
|
Set Name |
Test Cases |
Sample |
0_000.txt, 0_001.txt, 0_002.txt |
All |
0_000.txt, 0_001.txt, 0_002.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt, 1_015.txt, 1_016.txt, 1_017.txt, 1_018.txt, 1_019.txt, 1_020.txt, 1_021.txt, 1_022.txt, 1_023.txt, 1_024.txt, 1_025.txt, 1_026.txt, 1_027.txt, 1_028.txt, 1_029.txt, 1_030.txt, 1_031.txt, 1_032.txt, 1_033.txt, 1_034.txt, 1_035.txt |
Case Name |
Status |
Exec Time |
Memory |
0_000.txt |
AC |
1 ms |
256 KB |
0_001.txt |
AC |
1 ms |
256 KB |
0_002.txt |
AC |
1 ms |
256 KB |
1_003.txt |
AC |
1 ms |
256 KB |
1_004.txt |
AC |
1 ms |
256 KB |
1_005.txt |
AC |
1 ms |
256 KB |
1_006.txt |
AC |
1 ms |
256 KB |
1_007.txt |
AC |
1 ms |
256 KB |
1_008.txt |
AC |
1 ms |
256 KB |
1_009.txt |
AC |
1 ms |
256 KB |
1_010.txt |
AC |
1 ms |
256 KB |
1_011.txt |
AC |
1 ms |
256 KB |
1_012.txt |
AC |
1 ms |
256 KB |
1_013.txt |
AC |
1 ms |
256 KB |
1_014.txt |
AC |
148 ms |
73984 KB |
1_015.txt |
AC |
17 ms |
11136 KB |
1_016.txt |
AC |
107 ms |
55040 KB |
1_017.txt |
AC |
41 ms |
22784 KB |
1_018.txt |
AC |
2 ms |
512 KB |
1_019.txt |
AC |
11 ms |
7680 KB |
1_020.txt |
AC |
126 ms |
64256 KB |
1_021.txt |
AC |
49 ms |
25344 KB |
1_022.txt |
AC |
20 ms |
13312 KB |
1_023.txt |
AC |
94 ms |
55552 KB |
1_024.txt |
AC |
145 ms |
91008 KB |
1_025.txt |
AC |
193 ms |
94464 KB |
1_026.txt |
AC |
189 ms |
94464 KB |
1_027.txt |
AC |
194 ms |
94464 KB |
1_028.txt |
AC |
191 ms |
94464 KB |
1_029.txt |
AC |
193 ms |
94464 KB |
1_030.txt |
AC |
189 ms |
94464 KB |
1_031.txt |
AC |
191 ms |
94464 KB |
1_032.txt |
AC |
190 ms |
94464 KB |
1_033.txt |
AC |
145 ms |
94464 KB |
1_034.txt |
AC |
162 ms |
94464 KB |
1_035.txt |
AC |
153 ms |
94464 KB |