結果
| 問題 |
No.3116 More and more teleporter
|
| コンテスト | |
| ユーザー |
lumc_
|
| 提出日時 | 2025-04-20 12:35:53 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 310 ms / 2,000 ms |
| コード長 | 4,486 bytes |
| コンパイル時間 | 1,230 ms |
| コンパイル使用メモリ | 96,592 KB |
| 実行使用メモリ | 9,984 KB |
| 最終ジャッジ日時 | 2025-04-20 12:35:59 |
| 合計ジャッジ時間 | 5,104 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 22 |
ソースコード
// @ SegmentTree
// @snippet segmenttree
// @alias seg
// SegmentTree( size [, initial] )
// SegmentTree( <data> )
/// --- SegmentTree {{{ ///
#include <cassert>
#include <initializer_list>
#include <iostream>
#include <iterator>
#include <vector>
template < class Monoid >
struct SegmentTree {
private:
using T = typename Monoid::T;
using size_type = std::size_t;
size_type n;
std::vector< T > data;
// call after touch data[i]
void prop(int i) { data[i] = Monoid::op(data[2 * i], data[2 * i + 1]); }
public:
SegmentTree() : n(0) {}
SegmentTree(int n, T initial = Monoid::identity()) : n(n) {
data.resize(n * 2, initial);
for(int i = n - 1; i > 0; i--) data[i] = Monoid::op(data[i * 2], data[i * 2 + 1]);
}
template < class InputIter,
class = typename std::iterator_traits< InputIter >::value_type >
SegmentTree(InputIter first, InputIter last) : SegmentTree(distance(first, last)) {
copy(first, last, data.begin() + n);
// fill from deep
for(int i = n - 1; i > 0; i--) prop(i);
}
SegmentTree(std::vector< T > v) : SegmentTree(v.begin(), v.end()) {}
SegmentTree(std::initializer_list< T > v) : SegmentTree(v.begin(), v.end()) {}
void set(size_t i, const T &v) {
assert(i < n);
data[i += n] = v;
while(i >>= 1) prop(i); // propUp
}
T get(size_t i) {
assert(i < n);
return data[i + n];
}
T fold(int l, int r) {
if(l < 0) l = 0;
if(l >= r) return Monoid::identity();
if(r > static_cast< int >(n)) r = n;
T tmpL = Monoid::identity(), tmpR = Monoid::identity();
for(l += n, r += n; l < r; l >>= 1, r >>= 1) {
if(l & 1) tmpL = Monoid::op(tmpL, data[l++]);
if(r & 1) tmpR = Monoid::op(data[--r], tmpR);
}
return Monoid::op(tmpL, tmpR);
}
size_type size() { return n; }
inline void dum(int r = -1) {
#ifdef DEBUG
if(r < 0) r = n;
DEBUG_OUT << "{";
for(int i = 0; i < std::min< int >(r, n); i++) DEBUG_OUT << (i ? ", " : "") << get(i);
DEBUG_OUT << "}" << std::endl;
#endif
}
};
/// }}}--- ///
/// --- Monoid examples {{{ ///
constexpr long long inf_monoid = 1e18 + 100;
#include <algorithm>
struct Nothing {
using T = char;
using Monoid = Nothing;
using M = T;
static constexpr T op(const T &, const T &) { return T(); }
static constexpr T identity() { return T(); }
template < class X >
static constexpr X actInto(const M &, long long, const X &x) {
return x;
}
};
template < class U = long long >
struct RangeMin {
using T = U;
static T op(const T &a, const T &b) { return std::min< T >(a, b); }
static constexpr T identity() { return T(inf_monoid); }
};
template < class U = long long >
struct RangeMax {
using T = U;
static T op(const T &a, const T &b) { return std::max< T >(a, b); }
static constexpr T identity() { return T(-inf_monoid); }
};
template < class U = long long >
struct RangeSum {
using T = U;
static T op(const T &a, const T &b) { return a + b; }
static constexpr T identity() { return T(0); }
};
template < class U >
struct RangeProd {
using T = U;
static T op(const T &a, const T &b) { return a * b; }
static constexpr T identity() { return T(1); }
};
template < class U = long long >
struct RangeOr {
using T = U;
static T op(const T &a, const T &b) { return a | b; }
static constexpr T identity() { return T(0); }
};
#include <bitset>
template < class U = long long >
struct RangeAnd {
using T = U;
static T op(const T &a, const T &b) { return a & b; }
static constexpr T identity() { return T(-1); }
};
template < size_t N >
struct RangeAnd< std::bitset< N > > {
using T = std::bitset< N >;
static T op(const T &a, const T &b) { return a & b; }
static constexpr T identity() { return std::bitset< N >().set(); }
};
/// }}}--- ///
using Seg = SegmentTree< RangeMin<> >;
#include<iostream>
#include<cmath>
using namespace std;
using ll = long long;
int main() {
int N, Q;
cin >> N >> Q;
Seg segR(N);
Seg segL(N);
vector<ll> cs(N, ll(1e9));
for (int i = 0; i < Q; i++) {
int t;
cin >> t;
if (t == 1) {
int x;
cin >> x;
x--;
ll ans = min(
ll(x),
min(
segL.fold(0, x) - (N - 1 - x),
segR.fold(x, N) - x
)
);
cout << ans << endl;
} else {
int x; ll c;
cin >> x >> c;
x--;
if (c < cs[x]) {
cs[x] = c;
segL.set(x, N-1-x+c);
segR.set(x, x+c);
}
}
}
return 0;
}
lumc_