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답안 #697404

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
697404 2023-02-09T16:41:08 Z Do_you_copy Izbori (COCI22_izbori) C++17
110 / 110
 156 ms 20464 KB 
/*
    I find it wholesome to be alone the greater part of the time.
    To be in company, even with the best, is soon wearisome and dissipating.
    I love to be alone.
    I never found the companion that was so companionable as solitude.
*/
#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
#define int long long
using namespace std;
using ll = long long;
using ld = long double;
using pii = pair <int, int>;
mt19937_64 Rand(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 4e5 + 20;
//const int Mod = 1e9 + 7;
//const ll inf = 0x3f3f3f3f3f3f3f3f;
int n;
vector <int> S[maxN];
int a[maxN];
int dp[maxN];
ll ans;

ll calc(int i, int j, int k){
    int l = k - i;
    int r = k ;
    k = max(0LL, r - max(j + 1, l - 1));
    l = max(l, 0LL);
    r = min(r, j + 1);
    if (l > r) return k * (j + 1);
    return 1LL * (l + r) * (r - l + 1) / 2 + k * (j + 1);
}

void Light(int c){
    for (int i = 0; i < signed(S[c].size()); ++i){
        for (int j = i; j < signed(S[c].size()); ++j){
            int l = i ? S[c][i - 1] : 0;
            int r = (j + 1 == S[c].size()) ? n + 1 : S[c][j + 1];
            int k = (j - i + 1) - (S[c][j] - S[c][i] - j + i);
            ans += calc(S[c][i] - l - 1, r - S[c][j] - 1, k);
        }
    }
}

void Heavy(int c){
    memset(dp, 0, sizeof(dp));
    int cur = n + 4;
    dp[cur] = 1;
    for (int i = 1; i <= n; ++i){
        if (a[i] == c){
            ++cur;
            dp[cur] += dp[cur - 1];
        }
        else{
            dp[cur] -= dp[cur - 1];
            --cur;
        }
        ans += dp[cur - 1];
        ++dp[cur];
    }
}

void Init(){
    cin >> n;
    vector <int> node;
    for (int i = 1; i <= n; ++i){
        cin >> a[i];
        node.pb(a[i]);
    }
    sort(node.begin(), node.end());
    node.resize(unique(node.begin(), node.end()) - node.begin());
    for (int i = 1; i <= n; ++i){
        a[i] = upper_bound(node.begin(), node.end(), a[i]) - node.begin();
        S[a[i]].pb(i);
    }
    for (int i = 1; i <= n; ++i){
        if (S[i].empty()) continue;
        if (S[i].size() <= 318) Light(i);
        else Heavy(i);
    }
    cout << ans;
}

#define debug
#define taskname "test"
signed main(){
    faster
    if (fopen(taskname".inp", "r")){
        freopen(taskname".inp", "r", stdin);
        freopen(taskname".out", "w", stdout);
    }
    int tt = 1;
    //cin >> tt;
    while (tt--){
        Init();
    }
    if (fopen("timeout.txt", "r")){
        ofstream timeout("timeout.txt");
        timeout << signed(double(clock()) / CLOCKS_PER_SEC * 1000);
        timeout.close();
        #ifndef debug
        cerr << "Time elapsed: " << signed(double(clock()) / CLOCKS_PER_SEC * 1000) << "ms\n";
        #endif // debug
    }
}

Compilation message

Main.cpp: In function 'void Light(long long int)':
Main.cpp:41:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |             int r = (j + 1 == S[c].size()) ? n + 1 : S[c][j + 1];
      |                      ~~~~~~^~~~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:92:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:93:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |         freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 8 ms 9812 KB Output is correct
10 Correct 8 ms 9812 KB Output is correct
11 Correct 6 ms 9812 KB Output is correct
12 Correct 6 ms 9812 KB Output is correct
13 Correct 6 ms 9812 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9812 KB Output is correct
16 Correct 6 ms 9816 KB Output is correct
17 Correct 7 ms 12884 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 17100 KB Output is correct
2 Correct 24 ms 18252 KB Output is correct
3 Correct 17 ms 16072 KB Output is correct
4 Correct 25 ms 18316 KB Output is correct
5 Correct 25 ms 18252 KB Output is correct
6 Correct 30 ms 18884 KB Output is correct
7 Correct 28 ms 18904 KB Output is correct
8 Correct 26 ms 18976 KB Output is correct
9 Correct 29 ms 18488 KB Output is correct
10 Correct 26 ms 18460 KB Output is correct
11 Correct 23 ms 17628 KB Output is correct

Subtask #4
70.0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9684 KB Output is correct
9 Correct 8 ms 9812 KB Output is correct
10 Correct 8 ms 9812 KB Output is correct
11 Correct 6 ms 9812 KB Output is correct
12 Correct 6 ms 9812 KB Output is correct
13 Correct 6 ms 9812 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 6 ms 9812 KB Output is correct
16 Correct 6 ms 9816 KB Output is correct
17 Correct 7 ms 12884 KB Output is correct
18 Correct 20 ms 17100 KB Output is correct
19 Correct 24 ms 18252 KB Output is correct
20 Correct 17 ms 16072 KB Output is correct
21 Correct 25 ms 18316 KB Output is correct
22 Correct 25 ms 18252 KB Output is correct
23 Correct 30 ms 18884 KB Output is correct
24 Correct 28 ms 18904 KB Output is correct
25 Correct 26 ms 18976 KB Output is correct
26 Correct 29 ms 18488 KB Output is correct
27 Correct 26 ms 18460 KB Output is correct
28 Correct 23 ms 17628 KB Output is correct
29 Correct 33 ms 19580 KB Output is correct
30 Correct 18 ms 11548 KB Output is correct
31 Correct 35 ms 13396 KB Output is correct
32 Correct 96 ms 17904 KB Output is correct
33 Correct 38 ms 13528 KB Output is correct
34 Correct 35 ms 13800 KB Output is correct
35 Correct 24 ms 12392 KB Output is correct
36 Correct 16 ms 11348 KB Output is correct
37 Correct 19 ms 11784 KB Output is correct
38 Correct 29 ms 19452 KB Output is correct
39 Correct 31 ms 18884 KB Output is correct
40 Correct 30 ms 19140 KB Output is correct
41 Correct 36 ms 19144 KB Output is correct
42 Correct 30 ms 18884 KB Output is correct
43 Correct 43 ms 20456 KB Output is correct
44 Correct 45 ms 20464 KB Output is correct
45 Correct 45 ms 20340 KB Output is correct
46 Correct 44 ms 20416 KB Output is correct
47 Correct 44 ms 20448 KB Output is correct
48 Correct 114 ms 18684 KB Output is correct
49 Correct 107 ms 18624 KB Output is correct
50 Correct 61 ms 19196 KB Output is correct
51 Correct 66 ms 19244 KB Output is correct
52 Correct 156 ms 18456 KB Output is correct
53 Correct 146 ms 18352 KB Output is correct
54 Correct 96 ms 18500 KB Output is correct