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답안 #712564

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
712564 2023-03-19T07:21:49 Z Nhoksocqt1 정렬하기 (IOI15_sorting) C++17
0 / 100
 1000 ms 2260 KB 
#include<bits/stdc++.h>
using namespace std;

#define inf 0x3f3f3f3f
#define sz(x) int((x).size())
#define fi first
#define se second
#define round asfhuqfuqwhuqwer
typedef long long ll;
typedef pair<int, int> ii;

template<class X, class Y>
	inline bool maximize(X &x, const Y &y) {return (x < y ? x = y, 1 : 0);}
template<class X, class Y>
	inline bool minimize(X &x, const Y &y) {return (x > y ? x = y, 1 : 0);}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int Random(int l, int r) {
    return uniform_int_distribution<int>(l, r)(rng);
}

const int MAXN = 200005;

ii round[MAXN];
int val[MAXN], P[6 * MAXN][21], Pn[6 * MAXN][21], firstPn[MAXN];
int lastIdx[MAXN], pos[MAXN], tmp[MAXN], nArr, numRound;

#ifdef Nhoksocqt1

int findSwapPairs(int _N, int _S[], int _M, int _X[], int _Y[], int _P[], int _Q[]);
int _S[MAXN], _X[MAXN], _Y[MAXN], _P[MAXN], _Q[MAXN];

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    freopen("SORTING.inp", "r", stdin);
    freopen("SORTING.out", "w", stdout);

    int _N, _M;
    cin >> _N;
    for (int i = 0; i < _N; ++i)
        cin >> _S[i];

    //for (int i = 0; i < _N; ++i) _S[i] = i; shuffle(_S, _S + _N, rng); for (int i = 0; i < _N; ++i) cout << _S[i] << " \n"[i + 1 == _N];

    cin >> _M;
    for (int i = 0; i < _M; ++i) {
        cin >> _X[i];
        //_X[i] = Random(0, _N - 1); cout << _X[i] << " \n"[i + 1 == _M];
    }

    for (int i = 0; i < _M; ++i) {
        cin >> _Y[i];
        //_Y[i] = Random(0, _N - 1); cout << _Y[i] << " \n"[i + 1 == _M];
    }

    int ans = findSwapPairs(_N, _S, _M, _X, _Y, _P, _Q);
    cout << ans << '\n';
    for (int it = 0; it < ans; ++it)
        cout << _P[it] << ' ' << _Q[it] << '\n';

    return 0;
}

#endif // Nhoksocqt1

inline int getID(int x) {
    return (x > numRound) ? round[x - numRound].fi : round[x].se;
}

bool check(int nr, int _P[], int _Q[]) {
    for (int i = 1; i <= nArr; ++i) {
        tmp[i] = val[i];
        pos[val[i]] = i;
    }

    int cntNow(0);
    for (int i1 = 1; i1 <= nArr; ++i1) {
        for (int i = 1; i <= nArr; ++i) {
            int to(firstPn[i]);
            for (int j = 20; j >= 0; --j) {
                int now(Pn[to][j]);
                if(now <= numRound && now <= cntNow || now > numRound && now - numRound <= cntNow)
                    to = now;
            }

            if(to <= numRound && to <= cntNow || to > numRound && to - numRound <= cntNow)
                to = Pn[to][0];

            int f(to);
            for (int j = 20; j >= 0; --j) {
                int now(P[to][j]);
                if(now <= numRound && now <= nr || now > numRound && now - numRound <= nr)
                    to = now;
            }

            //cout << nr << ' ' << i << ' ' << tmp[i] << ' ' << firstPn[i] << ' ' << to << ' ' << getID(to) << '\n';
            bool checkCond = (to <= numRound && to > cntNow && to <= nr || to > numRound && to > cntNow && to - numRound <= nr);
            if(checkCond && tmp[i] == getID(to) || !checkCond && tmp[i] == i)
                continue;

            ++cntNow;
            swap(pos[tmp[round[cntNow].fi]], pos[tmp[round[cntNow].se]]);
            swap(tmp[round[cntNow].fi], tmp[round[cntNow].se]);
            if(cntNow > nr)
                return false;

            int x, y;
            if(checkCond) {
                x = pos[getID(to)], y = i;
            } else {
                x = pos[i], y = i;
            }

            if(round[cntNow].fi == y) {
                y = round[cntNow].se;
            } else
                if(round[cntNow].se == y) {
                    y = round[cntNow].fi;
                }

            _P[cntNow - 1] = x - 1, _Q[cntNow - 1] = y - 1;
            swap(pos[tmp[x]], pos[tmp[y]]);
            swap(tmp[x], tmp[y]);
            break;
        }
    }

    for (int i = cntNow; i < nr; ++i) {
        _P[i] = _Q[i] = 0;
        swap(tmp[round[i + 1].fi], tmp[round[i + 1].se]);
    }

    cout << nr << ": ";
    for (int i = 1; i <= nArr; ++i)
        cout << tmp[i] << " \n"[i == nArr];

    return true;
}

int findSwapPairs(int _N, int _S[], int _M, int _X[], int _Y[], int _P[], int _Q[]) {
    nArr = _N, numRound = _M;

    bool check0(1);
    for (int i = 1; i <= nArr; ++i) {
        val[i] = _S[i - 1] + 1;
        check0 &= (val[i] == i);
    }

    if(check0)
        return 0;

    for (int i = 1; i <= 2 * numRound; ++i)
        P[i][0] = Pn[i][0] = 2 * numRound + 1;

    for (int i = 1; i <= numRound; ++i) {
        round[i] = {_X[i - 1] + 1, _Y[i - 1] + 1};
        P[lastIdx[round[i].fi]][0] = i;
        P[lastIdx[round[i].se]][0] = i + numRound;
        lastIdx[round[i].se] = i;
        lastIdx[round[i].fi] = i + numRound;
    }

    for (int i = 1; i <= nArr; ++i)
        lastIdx[i] = 0;

    for (int i = 1; i <= numRound; ++i) {
        Pn[lastIdx[round[i].fi]][0] = i;
        Pn[lastIdx[round[i].se]][0] = i + numRound;
        lastIdx[round[i].fi] = i;
        lastIdx[round[i].se] = i + numRound;
        if(!firstPn[round[i].fi])
            firstPn[round[i].fi] = i;

        if(!firstPn[round[i].se])
            firstPn[round[i].se] = i + numRound;
    }

    for (int j = 0; j <= 20; ++j) {
        P[0][j] = Pn[0][j] = 2 * numRound + 1;
        P[2 * numRound + 1][j] = Pn[2 * numRound + 1][j] = 2 * numRound + 1;
        if(j > 0) {
            for (int i = 1; i <= 2 * numRound; ++i) {
                P[i][j] = P[P[i][j - 1]][j - 1];
                Pn[i][j] = Pn[Pn[i][j - 1]][j - 1];
            }
        }
    }

    for (int i = 1; i <= numRound; ++i) {
        if(check(i, _P, _Q))
            return i;
    }

    return 0;
}

Compilation message

sorting.cpp: In function 'bool check(int, int*, int*)':
sorting.cpp:84:36: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   84 |                 if(now <= numRound && now <= cntNow || now > numRound && now - numRound <= cntNow)
      |                    ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
sorting.cpp:88:31: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   88 |             if(to <= numRound && to <= cntNow || to > numRound && to - numRound <= cntNow)
      |                ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
sorting.cpp:94:36: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   94 |                 if(now <= numRound && now <= nr || now > numRound && now - numRound <= nr)
      |                    ~~~~~~~~~~~~~~~~^~~~~~~~~~~~
sorting.cpp:99:61: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   99 |             bool checkCond = (to <= numRound && to > cntNow && to <= nr || to > numRound && to > cntNow && to - numRound <= nr);
      |                               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
sorting.cpp:100:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  100 |             if(checkCond && tmp[i] == getID(to) || !checkCond && tmp[i] == i)
      |                ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
sorting.cpp:91:17: warning: unused variable 'f' [-Wunused-variable]
   91 |             int f(to);
      |                 ^

Subtask #1
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 1 ms 340 KB Expected integer, but "1:" found
4 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 1 ms 340 KB Expected integer, but "1:" found
4 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 340 KB Expected integer, but "2:" found
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 1 ms 340 KB Expected integer, but "1:" found
4 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1072 ms 2260 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1072 ms 2260 KB Time limit exceeded
2 Halted 0 ms 0 KB -