oj.uz

답안 #551901

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
551901 2022-04-21T20:57:25 Z Lobo 유괴 2 (JOI17_abduction2) C++17
27 / 100
 30 ms 35536 KB 
#include<bits/stdc++.h>
using namespace std;

const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

const int maxn = 2e3+10;

int n, m, q, a[maxn], b[maxn], mark[maxn][maxn][5], dp[maxn][maxn][5];
pair<int,int> mxalf[maxn][25], mxarg[maxn][25], mxblf[maxn][25], mxbrg[maxn][25];

//ver com 32 tambem
int mxblr(int l, int r) {
    if(l > r) return -1;
    int lg = 31-__builtin_clz(r-l+1);
    auto ans = max(mxbrg[l][lg],mxblf[r][lg]);
    return ans.fr;
}
int mxalr(int l, int r) {
    if(l > r) return -1;
    int lg = 31-__builtin_clz(r-l+1);
    auto ans = max(mxarg[l][lg],mxalf[r][lg]);
    return ans.fr;
}
    
//0 -> x aumenta, 1 -> x diminui e dobra para vertical
//2 -> y aumenta, 3 -> y diminui
//x -> M e y-> N
int cnt = 0;
int sol(int y, int x, int dir) {
    if(mark[y][x][dir]) return dp[y][x][dir];
    mark[y][x][dir] = 1;


    if(dir == 0) {
        //vou para um (x1,y) que b[x1] > a[y] e x1 > x
        if(mxblr(x+1,m) < a[y]) {
            return dp[y][x][dir] = m-x;
        }

        int l = x+1;
        int r = m;
        int ans = -1;

        while(l <= r) {
            int mid = (l+r)/2;

            if(mxblr(x+1,mid) >= a[y]) {
                ans = mid;
                r = mid-1;
            }
            else {
                l = mid+1;
            }
        }

        return dp[y][x][dir] = ans-x+max(sol(y,ans,2),sol(y,ans,3));
    }
    else if(dir == 1) {
        //vou para um (x1,y) que b[x1] > a[y] e x1 < x
        if(mxblr(1,x-1) < a[y]) {
            return dp[y][x][dir] = x-1;
        }

        int l = 1;
        int r = x-1;
        int ans = -1;

        while(l <= r) {
            int mid = (l+r)/2;

            if(mxblr(mid,x-1) >= a[y]) {
                ans = mid;
                l = mid+1;
            }
            else {
                r = mid-1;
            }
        }

        return dp[y][x][dir] = x-ans+max(sol(y,ans,2),sol(y,ans,3));
    }
    else if(dir == 2) {
        //vou para um (x,y1) que a[y1] > b[x] e y1 > y
        if(mxalr(y+1,n) < b[x]) {
            return dp[y][x][dir] = n-y;
        }

        int l = y+1;
        int r = n;
        int ans = -1;

        while(l <= r) {
            int mid = (l+r)/2;

            if(mxalr(y+1,mid) >= b[x]) {
                ans = mid;
                r = mid-1;
            }
            else {
                l = mid+1;
            }
        }

        return dp[y][x][dir] = ans-y+max(sol(ans,x,0),sol(ans,x,1));
    }
    else {
        //vou para um (x,y1) que a[y1] > b[x] e y1 < y
        if(mxalr(1,y-1) < b[x]) {
            return dp[y][x][dir] = y-1;
        }

        int l = 1;
        int r = y-1;
        int ans = -1;

        while(l <= r) {
            int mid = (l+r)/2;

            if(mxalr(mid,y-1) >= b[x]) {
                ans = mid;
                l = mid+1;
            }
            else {
                r = mid-1;
            }
        }

        return dp[y][x][dir] = y-ans+max(sol(ans,x,0),sol(ans,x,1));
    }
}



void solve() {
    cin >> n >> m >> q;

    for(int i = 1; i <= n; i++) {
        cin >> a[i];
        mxalf[i][0] = mxarg[i][0] = mp(a[i],i);
    }
    for(int i = 1; i <= m; i++) {
        cin >> b[i];
        mxblf[i][0] = mxbrg[i][0] = mp(b[i],i);
    }

    for(int pt = 1; pt <= 20; pt++) {
        for(int i = 1; i <= n; i++) {
            mxalf[i][pt] = max(mxalf[i][pt-1],mxalf[max(1LL,i-(1<<(pt-1)))][pt-1]);
        }
    }

    for(int pt = 1; pt <= 20; pt++) {
        for(int i = 1; i <= n; i++) {
            mxarg[i][pt] = max(mxarg[i][pt-1],mxarg[min(n,i+(1<<(pt-1)))][pt-1]);
        }
    }

    for(int pt = 1; pt <= 20; pt++) {
        for(int i = 1; i <= m; i++) {
            mxblf[i][pt] = max(mxblf[i][pt-1],mxblf[max(1LL,i-(1<<(pt-1)))][pt-1]);
        }
    }

    for(int pt = 1; pt <= 20; pt++) {
        for(int i = 1; i <= m; i++) {
            mxbrg[i][pt] = max(mxbrg[i][pt-1],mxbrg[min(m,i+(1<<(pt-1)))][pt-1]);
        }
    }

    while(q--) {
        int y,x;
        cin >> y >> x;
        cout << max({sol(y,x,0),sol(y,x,1),sol(y,x,2),sol(y,x,3)}) << endl;
    }

}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);

    // freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);
    
    int tt = 1;
    // cin >> tt;
    while(tt--) {
        solve();
    }

}

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 4 ms 3540 KB Output is correct
13 Correct 3 ms 3540 KB Output is correct
14 Correct 3 ms 3668 KB Output is correct
15 Correct 4 ms 3600 KB Output is correct
16 Correct 4 ms 3668 KB Output is correct
17 Correct 4 ms 3612 KB Output is correct
18 Correct 6 ms 4820 KB Output is correct
19 Correct 10 ms 14088 KB Output is correct
20 Correct 16 ms 19480 KB Output is correct
21 Correct 11 ms 15888 KB Output is correct
22 Correct 20 ms 26928 KB Output is correct

Subtask #3
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 4 ms 3540 KB Output is correct
13 Correct 3 ms 3540 KB Output is correct
14 Correct 3 ms 3668 KB Output is correct
15 Correct 4 ms 3600 KB Output is correct
16 Correct 4 ms 3668 KB Output is correct
17 Correct 4 ms 3612 KB Output is correct
18 Correct 6 ms 4820 KB Output is correct
19 Correct 10 ms 14088 KB Output is correct
20 Correct 16 ms 19480 KB Output is correct
21 Correct 11 ms 15888 KB Output is correct
22 Correct 20 ms 26928 KB Output is correct
23 Runtime error 10 ms 5524 KB Execution killed with signal 11
24 Halted 0 ms 0 KB -

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 11988 KB Output is correct
2 Correct 12 ms 11860 KB Output is correct
3 Correct 9 ms 11796 KB Output is correct
4 Correct 10 ms 12240 KB Output is correct
5 Correct 9 ms 11732 KB Output is correct
6 Correct 11 ms 13596 KB Output is correct
7 Correct 11 ms 13780 KB Output is correct
8 Correct 21 ms 29900 KB Output is correct
9 Correct 21 ms 29624 KB Output is correct
10 Correct 25 ms 28404 KB Output is correct
11 Correct 30 ms 35536 KB Output is correct

Subtask #5
0 / 56.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 4 ms 3540 KB Output is correct
13 Correct 3 ms 3540 KB Output is correct
14 Correct 3 ms 3668 KB Output is correct
15 Correct 4 ms 3600 KB Output is correct
16 Correct 4 ms 3668 KB Output is correct
17 Correct 4 ms 3612 KB Output is correct
18 Correct 6 ms 4820 KB Output is correct
19 Correct 10 ms 14088 KB Output is correct
20 Correct 16 ms 19480 KB Output is correct
21 Correct 11 ms 15888 KB Output is correct
22 Correct 20 ms 26928 KB Output is correct
23 Runtime error 10 ms 5524 KB Execution killed with signal 11
24 Halted 0 ms 0 KB -