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답안 #308405

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
308405 2020-10-01T05:43:11 Z thecodingwizard 유괴 2 (JOI17_abduction2) C++11
27 / 100
 5000 ms 10460 KB 
#include <bits/stdc++.h>

using namespace std;

#define ii pair<int, int>
#define f first
#define s second
#define mp make_pair

int h, w, q; 
int A[50000], B[50000];
int stH[16][50000];
int stW[16][50000];

int rmq(const int st[16][50000], int L, int R) {
    int best = 0;
    for (int i = L; i <= R; i++) {
        best = max(best, st[0][i]);
    }
    return best;
    int maxLen = 31 - __builtin_clz(R-L+1);
    return max(st[maxLen][L], st[maxLen][R - (1 << maxLen)+1]);
}

map<pair<int, ii>, int> memo;
int dx[4] = {-1,0,1,0};
int dy[4] = {0,1,0,-1};
int dp(int i, int j, int d) {
    auto memoIdx = mp(i, mp(j, d));
    if (memo.count(memoIdx)) {
        return memo[memoIdx];
    }

    int maxTravel;
    if (d == 0) maxTravel = i;
    else if (d == 1) maxTravel = w-j-1;
    else if (d == 2) maxTravel = h-i-1;
    else if (d == 3) maxTravel = j;

    int ans = 0;
    int lo = 1, hi = maxTravel+1, mid, k = 0;
    while (lo < hi) {
        mid = (lo + hi)/2;
        int a = i + dx[d]*mid, b = j + dy[d]*mid;
        if (a < 0 || a >= h || b < 0 || b >= w) {
            hi = mid;
            continue;
        }
        if (d == 0 || d == 2) {
            if (rmq(stH, min(i+dx[d], a), max(i+dx[d], a)) > B[j]) {
                k = mid;
                hi = mid;
            } else {
                lo = mid + 1;
            }
        }
        if (d == 1 || d == 3) {
            if (rmq(stW, min(j+dy[d], b), max(j+dy[d], b)) > A[i]) {
                k = mid;
                hi = mid;
            } else {
                lo = mid + 1;
            }
        }
    }

    if (k > 0) {
        ans += k;
        int a = i + dx[d]*k, b = j + dy[d]*k;
        if (a < 0 || a >= h || b < 0 || b >= w) {
            assert(false);
        }
        if (d == 0 || d == 2) {
            assert(A[a] > B[j]);
            ans += max(dp(a, b, 1), dp(a, b, 3));
        }
        if (d == 1 || d == 3) {
            assert(B[b] > A[i]);
            ans += max(dp(a, b, 0), dp(a, b, 2));
        }
    } else {
        ans += maxTravel;
    }

    return memo[memoIdx] = ans;
}

int main() {
    cin.tie(0); ios_base::sync_with_stdio(false);
    cin >> h >> w >> q;
    for (int i = 0; i < h; i++) cin >> A[i];
    for (int i = 0; i < w; i++) cin >> B[i];

    for (int i = 0; i < h; i++) {
        stH[0][i] = A[i];
    }
    for (int len = 1; len < 16; len++) {
        for (int i = 0; i <= h - (1 << len); i++) {
            stH[len][i] = max(stH[len-1][i], stH[len-1][i + (1<<(len-1))]);
        }
    }
    for (int i = 0; i < w; i++) {
        stW[0][i] = B[i];
    }
    for (int len = 1; len < 16; len++) {
        for (int i = 0; i <= w - (1 << len); i++) {
            stW[len][i] = max(stW[len-1][i], stW[len-1][i + (1<<(len-1))]);
        }
    }

    for (int i = 0; i < q; i++) {
        int s, t; cin >> s >> t; --s; --t;
        int best = 0;
        for (int j = 0; j < 4; j++) {
            best = max(best, dp(s, t, j));
        }
        cout << best << "\n";
    }

    return 0;
}

Compilation message

abduction2.cpp: In function 'int dp(int, int, int)':
abduction2.cpp:34:9: warning: 'maxTravel' may be used uninitialized in this function [-Wmaybe-uninitialized]
   34 |     int maxTravel;
      |         ^~~~~~~~~

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 640 KB Output is correct
16 Correct 1 ms 640 KB Output is correct
17 Correct 2 ms 640 KB Output is correct
18 Correct 8 ms 768 KB Output is correct
19 Correct 52 ms 1144 KB Output is correct
20 Correct 69 ms 1272 KB Output is correct
21 Correct 57 ms 1144 KB Output is correct
22 Correct 99 ms 1520 KB Output is correct

Subtask #3
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 640 KB Output is correct
16 Correct 1 ms 640 KB Output is correct
17 Correct 2 ms 640 KB Output is correct
18 Correct 8 ms 768 KB Output is correct
19 Correct 52 ms 1144 KB Output is correct
20 Correct 69 ms 1272 KB Output is correct
21 Correct 57 ms 1144 KB Output is correct
22 Correct 99 ms 1520 KB Output is correct
23 Correct 27 ms 7552 KB Output is correct
24 Correct 27 ms 7552 KB Output is correct
25 Correct 26 ms 7544 KB Output is correct
26 Correct 28 ms 7552 KB Output is correct
27 Correct 23 ms 7552 KB Output is correct
28 Execution timed out 5096 ms 10460 KB Time limit exceeded
29 Halted 0 ms 0 KB -

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 1024 KB Output is correct
2 Correct 14 ms 1024 KB Output is correct
3 Correct 16 ms 1024 KB Output is correct
4 Correct 15 ms 1024 KB Output is correct
5 Correct 16 ms 1024 KB Output is correct
6 Correct 32 ms 1144 KB Output is correct
7 Correct 31 ms 1016 KB Output is correct
8 Correct 92 ms 1784 KB Output is correct
9 Correct 90 ms 1528 KB Output is correct
10 Correct 87 ms 1528 KB Output is correct
11 Correct 113 ms 1656 KB Output is correct

Subtask #5
0 / 56.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 640 KB Output is correct
16 Correct 1 ms 640 KB Output is correct
17 Correct 2 ms 640 KB Output is correct
18 Correct 8 ms 768 KB Output is correct
19 Correct 52 ms 1144 KB Output is correct
20 Correct 69 ms 1272 KB Output is correct
21 Correct 57 ms 1144 KB Output is correct
22 Correct 99 ms 1520 KB Output is correct
23 Correct 27 ms 7552 KB Output is correct
24 Correct 27 ms 7552 KB Output is correct
25 Correct 26 ms 7544 KB Output is correct
26 Correct 28 ms 7552 KB Output is correct
27 Correct 23 ms 7552 KB Output is correct
28 Execution timed out 5096 ms 10460 KB Time limit exceeded
29 Halted 0 ms 0 KB -