oj.uz

Submission #101831

# Submission time Handle Problem Language Result Execution time Memory
101831 2019-03-20T12:27:58 Z alexpetrescu Dancing Elephants (IOI11_elephants) C++14
50 / 100
 9000 ms 3720 KB 
#include "elephants.h"
#include <vector>
#include <cmath>
#include <algorithm>

#define MAXN 150000
#define MAXR 100
#define LOGR 6
#define MAXK 1500
#define LOGK 11

bool seen;
int n, l, k, r;
std::vector < int > v[MAXR];
int u[MAXN], p[MAXN], poz[MAXN];
struct myc {
    int x, y;
} dp[MAXN];

inline void calc(std::vector < int > t) {
    int j = t.size() - 1;
    for (int i = t.size() - 1; i >= 0; i--) {
        if (u[t[i]] + l >= u[t.back()]) dp[t[i]] = {1, u[t[i]] + l};
        else {
            while (j - 1 > i && u[t[j - 1]] > u[t[i]] + l)
                j--;
            dp[t[i]] = {1 + dp[t[j]].x, dp[t[j]].y};
        }
    }
}

void init(int N, int L, int X[]) {
    if (seen == 0) {
        n = N;
        l = L;
        k = MAXK;
        seen = 1;
        for (int i = 0; i < n; i++)
            p[i] = i;
        for (int i = 0; i < n; i++)
            u[i] = X[i];
    }
    r = 1 + (n - 1) / k;
    for (int i = 0; i < r; i++) {
        v[i].resize(std::min(n, (i + 1) * k) - i * k);
        for (int j = i * k; j < n && j < (i + 1) * k; j++)
            v[i][j - i * k] = p[j], poz[p[j]] = i;
    }
    for (int i = r - 1; i >= 0; i--)
        calc(v[i]);
}

inline void myInit() {
    int aici[1] = {0};
    int j = 0;
    for (int i = 0; i < r; i++)
        for (auto &x : v[i])
            p[j++] = x;
    init(0, 0, aici);
}

inline void scoate(int p) {
    int i = 0;
    while (v[poz[p]][i] != p)
        i++;
    while (i + 1 < (int)v[poz[p]].size()) {
        v[poz[p]][i] = v[poz[p]][i + 1];
        i++;
    }
    v[poz[p]].pop_back();
}

inline void baga(int p) {
    int i = 0;
    while (i < (int)v[poz[p]].size() && u[v[poz[p]][i]] < u[p])
        i++;
    v[poz[p]].push_back(0);
    for (int j = v[poz[p]].size() - 1; j > i; j--)
        v[poz[p]][j] = v[poz[p]][j - 1];
    v[poz[p]][i] = p;
}

int update(int i, int y) {
    int e = 0, f = poz[i];
    for (int pas = 1 << LOGR; pas; pas >>= 1)
        if (e + pas < r && u[v[e + pas][0]] <= y)
            e += pas;

    scoate(i);
    poz[i] = e;
    u[i] = y;
    baga(i);

    if (f == e)
        calc(v[e]);
    else if (((int)v[f].size() == 0 && f != r - 1) || (int)v[e].size() == 2 * r)
        myInit();
    else if (e < f) {
        if ((int)v[f].size() == 0)
            r--;
        else
            calc(v[f]);
        calc(v[e]);
    } else {
        calc(v[e]);
        calc(v[f]);
    }

    int val = -1, ans = 0;
    for (int i = 0; i < r; i++) {
        if (val < u[v[i].back()]) {
            int rez = -1;
            for (int pas = 1 << LOGK; pas; pas >>= 1)
                if (rez + pas < (int)v[i].size() && u[v[i][rez + pas]] <= val)
                    rez += pas;
            rez++;
            ans += dp[v[i][rez]].x;
            val = dp[v[i][rez]].y;
        }
    }
    return ans;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 688 ms 1400 KB Output is correct
8 Correct 706 ms 1500 KB Output is correct
9 Correct 650 ms 2552 KB Output is correct
10 Correct 710 ms 2372 KB Output is correct
11 Correct 627 ms 2424 KB Output is correct
12 Correct 7308 ms 2816 KB Output is correct
13 Correct 821 ms 2424 KB Output is correct

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 688 ms 1400 KB Output is correct
8 Correct 706 ms 1500 KB Output is correct
9 Correct 650 ms 2552 KB Output is correct
10 Correct 710 ms 2372 KB Output is correct
11 Correct 627 ms 2424 KB Output is correct
12 Correct 7308 ms 2816 KB Output is correct
13 Correct 821 ms 2424 KB Output is correct
14 Correct 1526 ms 2096 KB Output is correct
15 Correct 1088 ms 1912 KB Output is correct
16 Correct 3348 ms 2908 KB Output is correct
17 Correct 6211 ms 3720 KB Output is correct
18 Execution timed out 9078 ms 3620 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #5
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 688 ms 1400 KB Output is correct
8 Correct 706 ms 1500 KB Output is correct
9 Correct 650 ms 2552 KB Output is correct
10 Correct 710 ms 2372 KB Output is correct
11 Correct 627 ms 2424 KB Output is correct
12 Correct 7308 ms 2816 KB Output is correct
13 Correct 821 ms 2424 KB Output is correct
14 Correct 1526 ms 2096 KB Output is correct
15 Correct 1088 ms 1912 KB Output is correct
16 Correct 3348 ms 2908 KB Output is correct
17 Correct 6211 ms 3720 KB Output is correct
18 Execution timed out 9078 ms 3620 KB Time limit exceeded
19 Halted 0 ms 0 KB -