oj.uz

Submission #558356

# Submission time Handle Problem Language Result Execution time Memory
558356 2022-05-07T07:17:01 Z Stickfish Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 112 ms 8528 KB 
#include <iostream>
#include <vector>
using namespace std;
using ll = long long;

const int MAXN = 1e5 + 123;
const ll INF = 1e18 + 132;
const ll MOD = 1000000007;
pair<ll, ll> rsz[MAXN];

ll choose_2(ll x) {
    x %= MOD;
    return x * (x - 1) / 2 % MOD;
}

signed main() {
    int n;
    cin >> n;
    for (int i = 0; i < n; ++i)
        cin >> rsz[i].second;
    for (int i = 0; i < n; ++i)
        cin >> rsz[i].first;
    ++n;
    ll ans = 0;
    vector<pair<ll, ll>> stck;
    stck.push_back({0, -1});
    ll curx = 0;
    for (int i = 0; i < n; ++i) {
        vector<pair<ll, ll>> rdel;
        while (stck.back().second >= rsz[i].second) {
            rdel.push_back(stck.back());
            stck.pop_back();
            rdel.back().first -= stck.back().first;
        }
        for (int j = 1; j < rdel.size(); ++j)
            rdel[j].first += rdel[j - 1].first;
        rdel.push_back({INF, rsz[i].second});
        for (int j = 0; j + 1 < rdel.size(); ++j) {
            ll choose_xs = choose_2(rdel[j].first + 1);
            ll upy = rdel[j].second - rdel[j + 1].second;
            ll choose_ys = upy * rdel[j + 1].second % MOD + choose_2(upy + 1);
            ans += choose_xs * choose_ys;
            ans %= MOD;
        }


        curx += rsz[i].first;
        stck.push_back({curx, rsz[i].second});
    }
    cout << ans << endl;
}

Compilation message

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:35:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         for (int j = 1; j < rdel.size(); ++j)
      |                         ~~^~~~~~~~~~~~~
fancyfence.cpp:38:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |         for (int j = 0; j + 1 < rdel.size(); ++j) {
      |                         ~~~~~~^~~~~~~~~~~~~

Subtask #1
0.0 / 0.0

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

Subtask #2
12.0 / 12.0

# 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 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 31 ms 1652 KB Output is correct
4 Correct 59 ms 3012 KB Output is correct
5 Correct 60 ms 3020 KB Output is correct
6 Correct 59 ms 2980 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 11 ms 648 KB Output is correct
3 Correct 43 ms 1932 KB Output is correct
4 Correct 83 ms 3692 KB Output is correct
5 Correct 90 ms 3892 KB Output is correct
6 Correct 1 ms 300 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 2 ms 212 KB Output is correct
3 Correct 10 ms 596 KB Output is correct
4 Correct 47 ms 1996 KB Output is correct
5 Correct 82 ms 3788 KB Output is correct
6 Correct 91 ms 3832 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 9 ms 1108 KB Output is correct
9 Correct 48 ms 3088 KB Output is correct
10 Correct 84 ms 8216 KB Output is correct
11 Correct 82 ms 8528 KB Output is correct
12 Correct 1 ms 212 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 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 1 ms 212 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 2 ms 340 KB Output is correct
10 Correct 1 ms 320 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 316 KB Output is correct
16 Correct 0 ms 212 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 2 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 32 ms 1564 KB Output is correct
12 Correct 55 ms 2992 KB Output is correct
13 Correct 63 ms 2980 KB Output is correct
14 Correct 64 ms 2928 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 9 ms 596 KB Output is correct
17 Correct 43 ms 1964 KB Output is correct
18 Correct 99 ms 3744 KB Output is correct
19 Correct 81 ms 3872 KB Output is correct
20 Correct 2 ms 340 KB Output is correct
21 Correct 9 ms 1160 KB Output is correct
22 Correct 50 ms 3160 KB Output is correct
23 Correct 76 ms 8252 KB Output is correct
24 Correct 80 ms 8408 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 2 ms 292 KB Output is correct
27 Correct 2 ms 320 KB Output is correct
28 Correct 2 ms 340 KB Output is correct
29 Correct 2 ms 320 KB Output is correct
30 Correct 9 ms 656 KB Output is correct
31 Correct 9 ms 596 KB Output is correct
32 Correct 38 ms 1936 KB Output is correct
33 Correct 41 ms 1992 KB Output is correct
34 Correct 82 ms 3492 KB Output is correct
35 Correct 81 ms 3580 KB Output is correct
36 Correct 91 ms 3728 KB Output is correct
37 Correct 112 ms 3692 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 84 ms 3716 KB Output is correct
40 Correct 80 ms 3700 KB Output is correct
41 Correct 82 ms 4360 KB Output is correct
42 Correct 91 ms 6032 KB Output is correct