結果

問題 No.59 鉄道の旅
ユーザー mai
提出日時 2017-05-17 23:33:50
言語 C++17(gcc12)
(gcc 12.3.0 + boost 1.87.0)
結果
AC  
実行時間 139 ms / 5,000 ms
コード長 8,349 bytes
コンパイル時間 14,567 ms
コンパイル使用メモリ 296,716 KB
最終ジャッジ日時 2025-01-05 00:19:48
ジャッジサーバーID
（参考情報） 		judge2 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 12
権限があれば一括ダウンロードができます

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")
#pragma GCC target ("avx")
#include "bits/stdc++.h" // define macro "/D__MAI"
using namespace std;
typedef unsigned int uint;
typedef long long int ll;
typedef unsigned long long int ull;
#define debugv(v) printf("L%d %s => ",__LINE__,#v);for(auto e:v){cout<<e<<" ";}cout<<endl;
#define debugm(m) printf("L%d %s is..\n",__LINE__,#m);for(auto v:m){for(auto e:v){cout<<e<<" ";}cout<<endl;}
#define debuga(m,w) printf("L%d %s is => ",__LINE__,#m);for(int x=0;x<(w);x++){cout<<(m)[x]<<" ";}cout<<endl;
#define debugaa(m,w,h) printf("L%d %s is..\n",__LINE__,#m);for(int y=0;y<(h);y++){for(int x=0;x<(w);x++){cout<<(m)[x][y]<<" ";}cout<<endl;}
#define debugaar(m,w,h) printf("L%d %s is..\n",__LINE__,#m);for(int y=0;y<(h);y++){for(int x=0;x<(w);x++){cout<<(m)[y][x]<<" ";}cout<<endl;}
#define ALL(v) (v).begin(),(v).end()
#define repeat(l) for(auto cnt=0;cnt<(l);++cnt)
#define upto(l,r) for(auto cnt=l;cnt<=r;++cnt)
#define downto(r,l) for(auti cnt=r;cnt>=l;--cnt)
#define BIGINT 0x7FFFFFFF
#define MD 1000000007ll
#define PI 3.1415926535897932384626433832795
template<typename T1, typename T2>
ostream& operator <<(ostream &o, const pair<T1, T2> p) { o << "(" << p.first << ":" << p.second << ")"; return o; }
#define TIME chrono::system_clock::now()
#define MILLISEC(t) (chrono::duration_cast<chrono::milliseconds>(t).count())
namespace {
    std::chrono::system_clock::time_point ttt;
    void tic() { ttt = TIME; }
    void toc() { fprintf(stderr, "TIME : %lldms\n", MILLISEC(TIME - ttt)); }
    std::chrono::system_clock::time_point tle = TIME;
#ifdef __MAI
    void safe_tle(int msec) { assert(MILLISEC(TIME - tle) < msec); }
#else
#define safe_tle(k) ;
#endif
}
#ifdef __MAI //_getchar_nolock
#define getchar_unlocked getchar
#endif
namespace {
    class MaiScanner {
    public:
        template<typename T>
        void input_integer(T& var) {
            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() { return getchar_unlocked(); }
        inline MaiScanner& operator>>(int& var) {
            input_integer<int>(var);
            return *this;
        }
        inline MaiScanner& operator>>(long long& var) {
            input_integer<long long>(var);
            return *this;
        }
    };
}
MaiScanner scanner;
template<typename T>
//typedef int T;
class segtree {
    int size;
public:
    struct VI {
        T val;
        int idx;
        VI(T val = 0, int idx = 0) :val(val), idx(idx) {}
        static const VI& max(const VI& a, const VI& b) {
            return a.val == b.val ? (a.idx < b.idx ? a : b) : (a.val >= b.val ? a : b);
        }
        static const VI& min(const VI& a, const VI& b) {
            return a.val == b.val ? (a.idx < b.idx ? a : b) : (a.val <= b.val ? a : b);
        }
        bool operator==(const VI& e) const {
            return val == e.val && idx == e.idx;
        }
        bool operator<(const VI& e) const {
            return (val < e.val) || (idx > e.idx);
        }
    };
private:
    vector<int> mark;
    vector<T> single; // max(min)遅延伝搬用
    vector<pair<T, T>> addtree;   // sum,lazy
    vector<VI> maxtree; // val,idx
public:
    segtree(int n) {
        size = 8;
        while (size < n) size <<= 1;
        addtree.resize(size * 2);
        mark.resize(size * 2);
        single.resize(size * 2);
        maxtree.resize(size * 2);
        _flat();
    }
    void _flat() {
        for (int i = 0; i < size; ++i) {
            maxtree[i + size - 1] = VI(0, i);
        }
        for (int i = size - 2; 0 <= i; --i) {
            int c = 2 * i + 1;
            maxtree[i] = maxtree[c];
        }
    }
    // 区間[begin,end)に一様にvalを加算する
    void addvalrange(int begin, int end, T val, int ptr = 0, int rangebegin = 0, int rangeend = 0) {
        if (rangeend <= rangebegin) { rangeend = size; }
        if (rangeend <= begin || end <= rangebegin) return; // note:範囲外
        if (begin <= rangebegin && rangeend <= end) {
            addtree[ptr].first += val * (rangeend - rangebegin);
            addtree[ptr].second += val * (rangeend - rangebegin) / 2;
            mark[ptr] |= 3;
            maxtree[ptr].val += val;
            single[ptr] += val;
            if (rangeend - rangebegin > 1) { // せっかくだから
                _applyDown(ptr);
            }
            return;
        }
        _applyDown(ptr);
        int rangemid = (rangebegin + rangeend) / 2;
        addvalrange(begin, end, val, ptr * 2 + 1, rangebegin, rangemid);
        addvalrange(begin, end, val, ptr * 2 + 2, rangemid, rangeend);
        addtree[ptr].first += val * (min(rangeend, end) - max(rangebegin, begin));
        maxtree[ptr] = VI::max(maxtree[ptr * 2 + 1], maxtree[ptr * 2 + 2]);
    }
    inline void _applyDown(int ptr) {
        //if (size - 1 <= ptr) return;
        if (mark[ptr] & 1) {
            mark[ptr] ^= 1;
            int c1 = ptr * 2 + 1;
            int c2 = ptr * 2 + 2;
            addtree[c1].first += addtree[ptr].second;
            addtree[c1].second += addtree[ptr].second / 2;
            mark[c1] |= 1;
            addtree[c2].first += addtree[ptr].second;
            addtree[c2].second += addtree[ptr].second / 2;
            mark[c2] |= 1;
            addtree[ptr].second = 0;
        }
        if (mark[ptr] & 2) {
            mark[ptr] ^= 2;
            int c1 = ptr * 2 + 1;
            int c2 = ptr * 2 + 2;
            maxtree[c1].val += single[ptr];
            single[c1] += single[ptr];
            mark[c1] |= 2;
            maxtree[c2].val += single[ptr];
            single[c2] += single[ptr];
            mark[c2] |= 2;
            single[ptr] = 0;
        }
    }
    inline void _downward_applyDown(int ptr1) {
        if (1 < ptr1) _downward_applyDown(ptr1 >> 1);
        _applyDown(ptr1 - 1);
    }
    T getval(int index) {
        T sum = 0;
        _downward_applyDown((index + size) >> 1);
        return addtree[index + size - 1].first;
    }
    T getsumrange(int begin, int end, int ptr = 0, int rangebegin = 0, int rangeend = 0) {
        if (rangeend <= rangebegin) { rangeend = size; }
        if (rangeend <= begin || end <= rangebegin) return 0; // note:範囲外
        if (begin <= rangebegin && rangeend <= end) return addtree[ptr].first;
        _applyDown(ptr);
        int rangemid = (rangebegin + rangeend) / 2;
        return getsumrange(begin, end, ptr * 2 + 1, rangebegin, rangemid)
            + getsumrange(begin, end, ptr * 2 + 2, rangemid, rangeend);
    }
    VI getmaxrange(int begin, int end, int ptr = 0, int rangebegin = 0, int rangeend = 0) {
        if (rangeend <= rangebegin) { rangeend = size; }
        if (rangeend <= begin || end <= rangebegin) return VI(0, -1); // note:範囲外
        if (begin <= rangebegin && rangeend <= end) return maxtree[ptr];
        _applyDown(ptr);
        int rangemid = (rangebegin + rangeend) / 2;
        VI l = getmaxrange(begin, end, ptr * 2 + 1, rangebegin, rangemid);
        VI r = getmaxrange(begin, end, ptr * 2 + 2, rangemid, rangeend);
        if (l.idx == -1) return r;
        if (r.idx == -1) return l;
        return VI::max(l, r);
    }
};
int width, height;
int m, n, kei;
int ww[101010];
int wzip[101010];
int main() {
    scanner >> n >> kei;
    set<int> bucket;
    repeat(n) {
        scanner >> ww[cnt];
        bucket.insert(abs(ww[cnt]));
    }
    int zipsize = 0;
    map<int,int> zip;
    for (int e : bucket) {
        zip[e] = ++zipsize;
    }
    repeat(n) {
        if (0 <= ww[cnt])
            wzip[cnt] = zip[ww[cnt]];
        else
            wzip[cnt] = -zip[abs(ww[cnt])];
    }
    segtree<int> seg(zipsize + 10);
    repeat(n) {
        int w = wzip[cnt];
        if (0 < w) {
            if (seg.getsumrange(w, zipsize + 1) < kei)
                seg.addvalrange(w, w + 1, 1);
        }
        else {
            w = -w;
            if (seg.getsumrange(w, w + 1) > 0)
                seg.addvalrange(w, w + 1, -1);
        }
    }
    cout << seg.getsumrange(0, zipsize + 1) << endl;
    
    return 0;
}
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