oj.uz

Submission #751043

# Submission time Handle Problem Language Result Execution time Memory
751043 2023-05-30T22:36:52 Z ToniB Monochrome Points (JOI20_monochrome) C++17
25 / 100
 2000 ms 304 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MAXN = 4e5 + 2;

int n;
string s;
vector<int> white, black;

bool cross(int x1, int y1, int x2, int y2){
    if(x1 > y1) swap(x1, y1);
    if(x2 > y2) swap(x2, y2);
    if(x1 < x2 && y2 < y1) return false;
    if(x2 < x1 && y1 < y2) return false;
    if(x1 > y2 || x2 > y1) return false;
    return true;
}

int calc(int delta){
    int ret = 0;
    for(int i = 0; i < n; ++i){
        for(int j = i + 1; j < n; ++j){
            if(cross(white[i], black[(i + delta) % n], white[j], black[(j + delta) % n])) ++ret;
        }
    }
    return ret;
}

int main(){
    cin >> n >> s;

    for(int i = 0; i < 2*n; ++i){
        if(s[i] == 'W') white.push_back(i);
        else black.push_back(i);
    }

    int ans = 0;
    for(int i = 0; i < n; ++i){
        ans = max(ans, calc(i));
    }

    cout << ans;
	return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 296 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 300 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 300 KB Output is correct
13 Correct 1 ms 212 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 296 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 300 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 300 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 64 ms 288 KB Output is correct
15 Correct 63 ms 296 KB Output is correct
16 Correct 61 ms 288 KB Output is correct
17 Correct 68 ms 284 KB Output is correct
18 Correct 49 ms 284 KB Output is correct
19 Correct 52 ms 296 KB Output is correct
20 Correct 50 ms 212 KB Output is correct
21 Correct 43 ms 284 KB Output is correct
22 Correct 45 ms 296 KB Output is correct
23 Correct 17 ms 212 KB Output is correct
24 Correct 42 ms 212 KB Output is correct
25 Correct 38 ms 212 KB Output is correct
26 Correct 45 ms 212 KB Output is correct
27 Correct 52 ms 296 KB Output is correct
28 Correct 60 ms 304 KB Output is correct
29 Correct 48 ms 212 KB Output is correct
30 Correct 45 ms 212 KB Output is correct
31 Correct 64 ms 288 KB Output is correct
32 Correct 63 ms 288 KB Output is correct
33 Correct 63 ms 288 KB Output is correct

Subtask #3
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 296 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 300 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 300 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 64 ms 288 KB Output is correct
15 Correct 63 ms 296 KB Output is correct
16 Correct 61 ms 288 KB Output is correct
17 Correct 68 ms 284 KB Output is correct
18 Correct 49 ms 284 KB Output is correct
19 Correct 52 ms 296 KB Output is correct
20 Correct 50 ms 212 KB Output is correct
21 Correct 43 ms 284 KB Output is correct
22 Correct 45 ms 296 KB Output is correct
23 Correct 17 ms 212 KB Output is correct
24 Correct 42 ms 212 KB Output is correct
25 Correct 38 ms 212 KB Output is correct
26 Correct 45 ms 212 KB Output is correct
27 Correct 52 ms 296 KB Output is correct
28 Correct 60 ms 304 KB Output is correct
29 Correct 48 ms 212 KB Output is correct
30 Correct 45 ms 212 KB Output is correct
31 Correct 64 ms 288 KB Output is correct
32 Correct 63 ms 288 KB Output is correct
33 Correct 63 ms 288 KB Output is correct
34 Execution timed out 2086 ms 212 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 296 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 300 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 300 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 64 ms 288 KB Output is correct
15 Correct 63 ms 296 KB Output is correct
16 Correct 61 ms 288 KB Output is correct
17 Correct 68 ms 284 KB Output is correct
18 Correct 49 ms 284 KB Output is correct
19 Correct 52 ms 296 KB Output is correct
20 Correct 50 ms 212 KB Output is correct
21 Correct 43 ms 284 KB Output is correct
22 Correct 45 ms 296 KB Output is correct
23 Correct 17 ms 212 KB Output is correct
24 Correct 42 ms 212 KB Output is correct
25 Correct 38 ms 212 KB Output is correct
26 Correct 45 ms 212 KB Output is correct
27 Correct 52 ms 296 KB Output is correct
28 Correct 60 ms 304 KB Output is correct
29 Correct 48 ms 212 KB Output is correct
30 Correct 45 ms 212 KB Output is correct
31 Correct 64 ms 288 KB Output is correct
32 Correct 63 ms 288 KB Output is correct
33 Correct 63 ms 288 KB Output is correct
34 Execution timed out 2086 ms 212 KB Time limit exceeded
35 Halted 0 ms 0 KB -