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Submission #755447

# Submission time Handle Problem Language Result Execution time Memory
755447 2023-06-10T06:26:48 Z MilosMilutinovic Izbori (COCI22_izbori) C++14
40 / 110
 3000 ms 2264 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 10;
const int M = 2 * N;
const int B = 2 * sqrt(N);
int n, a[N], c[M], cnt[N], occ[N];
void modify(int p, int v) {
    for (p += N; p < M; p += p & -p) c[p] += v;
}
int query(int p) {
    int res = 0;
    for (p += N; p > 0; p -= p & -p) res += c[p];
    return res;
}
void compress() {
    vector<int> xs;
    for (int i = 1; i <= n; i++)
        xs.push_back(a[i]);
    sort(xs.begin(), xs.end());
    xs.erase(unique(xs.begin(), xs.end()), xs.end());
    for (int i = 1; i <= n; i++) {
        a[i] = (int) (lower_bound(xs.begin(), xs.end(), a[i]) - xs.begin()) + 1;
    }
}
int main() {
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf("%d", &a[i]);
    }
    compress();
    for (int i = 1; i <= n; i++) {
        occ[a[i]] += 1;
    }
    long long ans = 0;
    for (int v = 1; v <= n; v++) {
        if (occ[v] >= B) {
            modify(0, +1);
            int bal = 0;
            for (int i = 1; i <= n; i++) {
                bal += (a[i] == v ? 1 : -1);
                ans += query(bal - 1);
                modify(bal, +1);
            }
            modify(0, -1);
            bal = 0;
            for (int i = 1; i <= n; i++) {
                bal += (a[i] == v ? 1 : -1);
                modify(bal, -1);
            }
        }
    }
    for (int l = 1; l <= n; l++) {
        int f = a[l];
        for (int r = l; r <= min(l + 2 * B, n); r++) {
            cnt[a[r]] += 1;
            if (cnt[a[r]] > cnt[f])
                f = a[r];
            if (cnt[f] * 2 > r - l + 1 && occ[f] < B)
                ans++;
        }
        for (int r = l; r <= min(l + 2 * B, n); r++) {
            cnt[a[r]] = 0;
        }
    }
    printf("%lld", ans);
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:26:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
Main.cpp:28:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 3 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 13 ms 340 KB Output is correct
10 Correct 12 ms 344 KB Output is correct
11 Correct 9 ms 340 KB Output is correct
12 Correct 12 ms 340 KB Output is correct
13 Correct 12 ms 344 KB Output is correct
14 Correct 12 ms 340 KB Output is correct
15 Correct 13 ms 348 KB Output is correct
16 Correct 13 ms 340 KB Output is correct
17 Correct 13 ms 376 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1439 ms 1996 KB Output is correct
2 Correct 1868 ms 2108 KB Output is correct
3 Correct 1120 ms 1360 KB Output is correct
4 Correct 1961 ms 2124 KB Output is correct
5 Correct 2043 ms 2124 KB Output is correct
6 Correct 2218 ms 2252 KB Output is correct
7 Correct 2183 ms 2188 KB Output is correct
8 Correct 2198 ms 2252 KB Output is correct
9 Correct 2154 ms 2252 KB Output is correct
10 Correct 2201 ms 2252 KB Output is correct
11 Correct 2077 ms 2232 KB Output is correct

Subtask #4
0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 3 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 13 ms 340 KB Output is correct
10 Correct 12 ms 344 KB Output is correct
11 Correct 9 ms 340 KB Output is correct
12 Correct 12 ms 340 KB Output is correct
13 Correct 12 ms 344 KB Output is correct
14 Correct 12 ms 340 KB Output is correct
15 Correct 13 ms 348 KB Output is correct
16 Correct 13 ms 340 KB Output is correct
17 Correct 13 ms 376 KB Output is correct
18 Correct 1439 ms 1996 KB Output is correct
19 Correct 1868 ms 2108 KB Output is correct
20 Correct 1120 ms 1360 KB Output is correct
21 Correct 1961 ms 2124 KB Output is correct
22 Correct 2043 ms 2124 KB Output is correct
23 Correct 2218 ms 2252 KB Output is correct
24 Correct 2183 ms 2188 KB Output is correct
25 Correct 2198 ms 2252 KB Output is correct
26 Correct 2154 ms 2252 KB Output is correct
27 Correct 2201 ms 2252 KB Output is correct
28 Correct 2077 ms 2232 KB Output is correct
29 Correct 2130 ms 2124 KB Output is correct
30 Correct 390 ms 860 KB Output is correct
31 Correct 794 ms 1224 KB Output is correct
32 Correct 1954 ms 2160 KB Output is correct
33 Correct 835 ms 1272 KB Output is correct
34 Correct 853 ms 1380 KB Output is correct
35 Correct 560 ms 1024 KB Output is correct
36 Correct 330 ms 852 KB Output is correct
37 Correct 404 ms 876 KB Output is correct
38 Correct 2045 ms 2252 KB Output is correct
39 Correct 2039 ms 2252 KB Output is correct
40 Correct 2047 ms 2228 KB Output is correct
41 Correct 2063 ms 2252 KB Output is correct
42 Correct 2066 ms 2252 KB Output is correct
43 Correct 2086 ms 2236 KB Output is correct
44 Correct 2132 ms 2252 KB Output is correct
45 Correct 2075 ms 2216 KB Output is correct
46 Correct 2069 ms 2172 KB Output is correct
47 Correct 2065 ms 2264 KB Output is correct
48 Execution timed out 3058 ms 2252 KB Time limit exceeded
49 Halted 0 ms 0 KB -