oj.uz

Submission #850941

# Submission time Handle Problem Language Result Execution time Memory
850941 2023-09-18T00:46:18 Z olnyfcxwps Radio Towers (IOI22_towers) C++17
11 / 100
 4000 ms 2384 KB 
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

struct Tower {
    int pos;
    int h;
}towers[100000];

int height[100000];
int tower_cnt;
bool ok;
bool picked[100000];
int k;

void special_case(){
    while (k < tower_cnt-1 and height[k] < height[k+1]){
        k += 1;
    }
    for (int i = k;i < tower_cnt-1;i++){
        if (height[i] <= height[i+1]){
            ok = false;
        }
    }
}
void init(int N, vector<int> H) {
    tower_cnt = N;
    for (int i = 0; i < N; i++) {
        height[i] = H[i];
        towers[i].h = H[i];
        towers[i].pos = i;
    }
    special_case();
}

bool cmp(struct Tower t1, struct Tower t2) {
    return t1.h < t2.h;
}

int max_towers(int L, int R, int D) {
    if (ok){
        if ((L <= k and R <= k) or (L >= k and R >= k)){
            return 1;
        }
        else if (height[L] <= height[k]-D and height[R] <= height[k]-D){
            return 2;
        }else{
            return 1;
        }
    }else {
        int ans = 0;
        sort(towers, towers + tower_cnt, cmp);
        /*for (int i = 0; i < tower_cnt; i++) {
            cout << towers[i].pos << "\n";
        }*/
        for (int i = 0; i < tower_cnt; i++) {
            int pos = towers[i].pos;
            if (pos < L || pos > R) {
                continue;
            }
            int h = towers[i].h;
            bool valid = true;

            int max_left = h;
            for (int j = pos - 1; j >= L; j--) {
                if (picked[j]) {
                    if (max_left - D < height[j] || max_left - D < h) {
                        valid = false;
                        break;
                    }
                }
                if (height[j] > max_left) {
                    max_left = height[j];
                }
            }

            int max_right = h;
            for (int j = pos + 1; j <= R; j++) {
                if (picked[j]) {
                    if (max_right - D < height[j] || max_right - D < h) {
                        valid = false;
                        break;
                    }
                }
                if (height[j] > max_right) {
                    max_right = height[j];
                }
            }

            if (valid) {
                picked[pos] = true;
                // cout << pos << "\n";
                ans += 1;
            }
        }
        return ans;
    }
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4054 ms 1460 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 2 ms 532 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 2 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 3 ms 344 KB Output is correct
21 Correct 3 ms 344 KB Output is correct
22 Correct 3 ms 344 KB Output is correct
23 Correct 4 ms 344 KB Output is correct
24 Correct 3 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 2 ms 344 KB Output is correct
28 Correct 2 ms 344 KB Output is correct
29 Correct 2 ms 344 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 4 ms 344 KB Output is correct
33 Correct 4 ms 344 KB Output is correct
34 Correct 4 ms 344 KB Output is correct
35 Correct 4 ms 484 KB Output is correct

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 2 ms 532 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 2 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 3 ms 344 KB Output is correct
21 Correct 3 ms 344 KB Output is correct
22 Correct 3 ms 344 KB Output is correct
23 Correct 4 ms 344 KB Output is correct
24 Correct 3 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 2 ms 344 KB Output is correct
28 Correct 2 ms 344 KB Output is correct
29 Correct 2 ms 344 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 4 ms 344 KB Output is correct
33 Correct 4 ms 344 KB Output is correct
34 Correct 4 ms 344 KB Output is correct
35 Correct 4 ms 484 KB Output is correct
36 Correct 333 ms 1732 KB Output is correct
37 Correct 226 ms 2384 KB Output is correct
38 Correct 112 ms 2372 KB Output is correct
39 Correct 58 ms 2376 KB Output is correct
40 Correct 133 ms 2376 KB Output is correct
41 Execution timed out 4053 ms 2376 KB Time limit exceeded
42 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4050 ms 2376 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4061 ms 920 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 2 ms 532 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 2 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 3 ms 344 KB Output is correct
21 Correct 3 ms 344 KB Output is correct
22 Correct 3 ms 344 KB Output is correct
23 Correct 4 ms 344 KB Output is correct
24 Correct 3 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 2 ms 344 KB Output is correct
28 Correct 2 ms 344 KB Output is correct
29 Correct 2 ms 344 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 4 ms 344 KB Output is correct
33 Correct 4 ms 344 KB Output is correct
34 Correct 4 ms 344 KB Output is correct
35 Correct 4 ms 484 KB Output is correct
36 Correct 333 ms 1732 KB Output is correct
37 Correct 226 ms 2384 KB Output is correct
38 Correct 112 ms 2372 KB Output is correct
39 Correct 58 ms 2376 KB Output is correct
40 Correct 133 ms 2376 KB Output is correct
41 Execution timed out 4053 ms 2376 KB Time limit exceeded
42 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4054 ms 1460 KB Time limit exceeded
2 Halted 0 ms 0 KB -