結果
| 問題 |
No.1668 Grayscale
|
| コンテスト | |
| ユーザー |
keijak
|
| 提出日時 | 2021-09-04 01:12:56 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 446 ms / 4,000 ms |
| コード長 | 3,517 bytes |
| コンパイル時間 | 2,537 ms |
| コンパイル使用メモリ | 207,192 KB |
| 最終ジャッジ日時 | 2025-01-24 07:31:08 |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 22 |
ソースコード
#include <bits/stdc++.h>
#define REP_(i, a_, b_, a, b, ...) \
for (int i = (a), END_##i = (b); i < END_##i; ++i)
#define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
#define ALL(x) std::begin(x), std::end(x)
using i64 = long long;
template<typename T, typename U>
inline bool chmax(T &a, U b) {
return a < b and ((a = std::move(b)), true);
}
template<typename T, typename U>
inline bool chmin(T &a, U b) {
return a > b and ((a = std::move(b)), true);
}
template<typename T>
inline int ssize(const T &a) {
return (int) std::size(a);
}
template<typename T>
std::istream &operator>>(std::istream &is, std::vector<T> &a) {
for (auto &x: a) is >> x;
return is;
}
template<typename T, typename U>
std::ostream &operator<<(std::ostream &os, const std::pair<T, U> &a) {
return os << "(" << a.first << ", " << a.second << ")";
}
template<typename Container>
std::ostream &print_seq(const Container &a, std::string_view sep = " ",
std::string_view ends = "\n",
std::ostream &os = std::cout) {
auto b = std::begin(a), e = std::end(a);
for (auto it = std::begin(a); it != e; ++it) {
if (it != b) os << sep;
os << *it;
}
return os << ends;
}
template<typename T, typename = void>
struct is_iterable : std::false_type {};
template<typename T>
struct is_iterable<T, std::void_t<decltype(std::begin(std::declval<T>())),
decltype(std::end(std::declval<T>()))>>
: std::true_type {
};
template<typename T, typename = std::enable_if_t<
is_iterable<T>::value &&
!std::is_same<T, std::string_view>::value &&
!std::is_same<T, std::string>::value>>
std::ostream &operator<<(std::ostream &os, const T &a) {
return print_seq(a, ", ", "", (os << "{")) << "}";
}
void print() { std::cout << "\n"; }
template<class T>
void print(const T &x) {
std::cout << x << "\n";
}
template<typename Head, typename... Tail>
void print(const Head &head, Tail... tail) {
std::cout << head << " ";
print(tail...);
}
struct Input {
template<typename T>
operator T() const {
T x;
std::cin >> x;
return x;
}
} in;
#ifdef MY_DEBUG
#include "debug_dump.hpp"
#else
#define DUMP(...)
#endif
using namespace std;
template<typename T>
void rotate90(vector<vector<T>> &grid, int &H, int &W) {
assert((int) grid.size() == H);
auto tmp = vector(W, vector(H, T()));
for (int i = 0; i < H; ++i) {
assert((int) grid[i].size() == W);
for (int j = 0; j < W; ++j) {
tmp[W - 1 - j][i] = grid[i][j];
}
}
grid = std::move(tmp);
std::swap(H, W);
}
auto solve() {
int H = in, W = in, N = in;
vector C(H, vector(W, 0));
REP(i, H) {
REP(j, W) {
int c = in;
C[i][j] = c;
}
}
vector<pair<int, int>> intervals;
auto grid = C;
REP(trans, 2) {
REP(i, H - 1) REP(j, W) {
int l = grid[i][j];
int r = grid[i + 1][j];
if (l == r) continue;
if (l > r) swap(l, r);
intervals.push_back({r, l});
}
rotate90(grid, H, W);
}
sort(ALL(intervals));
intervals.erase(unique(ALL(intervals)), intervals.end());
DUMP(intervals);
int last = -100;
int cnt = 1;
for (auto[r, l]: intervals) {
if (l <= last) continue;
cnt++;
last = r - 1;
}
assert(cnt <= N);
return cnt;
}
int main() {
ios_base::sync_with_stdio(false), cin.tie(nullptr);
cout << std::fixed << std::setprecision(18);
const int t = 1;
REP(test_case, t) {
auto ans = solve();
print(ans);
}
}
keijak