oj.uz

Submission #1038749

# Submission time Handle Problem Language Result Execution time Memory
1038749 2024-07-30T07:13:15 Z phong Monochrome Points (JOI20_monochrome) C++17
100 / 100
 1508 ms 38612 KB 
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
//#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>

#define ll long long
const int nmax = 4e5 + 5, N = 1e5;
const ll oo = 1e9;
const int lg = 19, M = 2, mod = 1e6;
#define pii pair<ll, ll>
#define fi first
#define se second
#define debug(a, n) for(int i = 1; i <= n; ++i) cout << a[i] << ' '; cout << "\n";
#define endl "\n"
#define task "code"
using namespace std;

int n;
string s;
vector<int> one, two;
vector<pii> tmp;
struct holder{
    vector<int> tmp;
    int f[nmax];

    void update(int x, int val){
        for(; x <= 2 *n; x += x&-x) f[x] += val, tmp.push_back(x);
    }
    int get(int x){
        int res = 0;
        for(; x ; x -= x&-x) res += f[x];
        return res;
    }
    void clear(){
        for(auto p : tmp) f[p] = 0;
        tmp.clear();
    }
}F, G;
ll get(int x){
    tmp.clear();
    for(int i = 0; i < n; ++i){
        int u = one[i];
        int v = two[(i + x + n * 10) % n];
        if(u > v) swap(u, v);
        tmp.push_back({u, v});
//        cout << u << ' ' << v << endl;
    }
    sort(tmp.begin(), tmp.end());
//    for(auto [u, v] : tmp) cout << u << ' ' << v << endl;
    ll ans = 0;
    for(int i = tmp.size() - 1; i >= 0; --i){
        ans += G.get(tmp[i].se) - F.get(tmp[i].se);
        F.update(tmp[i].se, 1);
        G.update(tmp[i].fi, 1);
    }
    F.clear();G.clear();
    return ans;
}
main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
//    freopen(task".inp", "r", stdin);
//    freopen(task".out", "w", stdout);
    cin >> n;
    cin >> s;
    for(int i = 0; i < s.size(); ++i){
        if(s[i] == 'W') one.push_back(i + 1);
        else two.push_back(i + 1);
    }
//    cout << get(0);
//    for(int i = 0; i < n; ++i) cout << get(i) << ' ';
    int l = 0, r = n - 2, kq = -1;
    while(l <= r){
        int mid = r + l >> 1;
        if(get(mid) <= get(mid + 1)){
            kq = mid;
            l = mid + 1;
        }
        else r = mid - 1;
    }
    ll ans = 0;
    for(int i = kq - 10; i <= kq + 10; ++i) ans = max(ans, get(i));
    cout << ans;

}
/*
5
5 2 1 5 3
3
1 4
2 5
1 5

4
2 1 5 3
1
1 4


*/

Compilation message

monochrome.cpp:59:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   59 | main(){
      | ^~~~
monochrome.cpp: In function 'int main()':
monochrome.cpp:66:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |     for(int i = 0; i < s.size(); ++i){
      |                    ~~^~~~~~~~~~
monochrome.cpp:74:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   74 |         int mid = r + l >> 1;
      |                   ~~^~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 480 KB Output is correct
33 Correct 1 ms 348 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 480 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 7 ms 604 KB Output is correct
35 Correct 7 ms 604 KB Output is correct
36 Correct 7 ms 604 KB Output is correct
37 Correct 7 ms 604 KB Output is correct
38 Correct 5 ms 600 KB Output is correct
39 Correct 6 ms 604 KB Output is correct
40 Correct 5 ms 604 KB Output is correct
41 Correct 5 ms 604 KB Output is correct
42 Correct 7 ms 604 KB Output is correct
43 Correct 6 ms 604 KB Output is correct
44 Correct 7 ms 768 KB Output is correct
45 Correct 6 ms 604 KB Output is correct
46 Correct 7 ms 604 KB Output is correct
47 Correct 5 ms 604 KB Output is correct
48 Correct 5 ms 604 KB Output is correct
49 Correct 5 ms 604 KB Output is correct
50 Correct 7 ms 772 KB Output is correct
51 Correct 4 ms 780 KB Output is correct
52 Correct 7 ms 600 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 480 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 7 ms 604 KB Output is correct
35 Correct 7 ms 604 KB Output is correct
36 Correct 7 ms 604 KB Output is correct
37 Correct 7 ms 604 KB Output is correct
38 Correct 5 ms 600 KB Output is correct
39 Correct 6 ms 604 KB Output is correct
40 Correct 5 ms 604 KB Output is correct
41 Correct 5 ms 604 KB Output is correct
42 Correct 7 ms 604 KB Output is correct
43 Correct 6 ms 604 KB Output is correct
44 Correct 7 ms 768 KB Output is correct
45 Correct 6 ms 604 KB Output is correct
46 Correct 7 ms 604 KB Output is correct
47 Correct 5 ms 604 KB Output is correct
48 Correct 5 ms 604 KB Output is correct
49 Correct 5 ms 604 KB Output is correct
50 Correct 7 ms 772 KB Output is correct
51 Correct 4 ms 780 KB Output is correct
52 Correct 7 ms 600 KB Output is correct
53 Correct 1470 ms 30196 KB Output is correct
54 Correct 1451 ms 23856 KB Output is correct
55 Correct 1371 ms 22464 KB Output is correct
56 Correct 1355 ms 22616 KB Output is correct
57 Correct 1085 ms 22620 KB Output is correct
58 Correct 991 ms 23444 KB Output is correct
59 Correct 1079 ms 29480 KB Output is correct
60 Correct 1156 ms 22624 KB Output is correct
61 Correct 1309 ms 29520 KB Output is correct
62 Correct 1217 ms 22932 KB Output is correct
63 Correct 1282 ms 22576 KB Output is correct
64 Correct 979 ms 22596 KB Output is correct
65 Correct 1292 ms 28664 KB Output is correct
66 Correct 1150 ms 29508 KB Output is correct
67 Correct 1251 ms 29648 KB Output is correct
68 Correct 944 ms 21412 KB Output is correct
69 Correct 1004 ms 29840 KB Output is correct
70 Correct 977 ms 28112 KB Output is correct
71 Correct 1420 ms 22920 KB Output is correct
72 Correct 941 ms 23004 KB Output is correct
73 Correct 1508 ms 38612 KB Output is correct