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Submission #372262

# Submission time Handle Problem Language Result Execution time Memory
372262 2021-02-27T11:15:13 Z gustason Travels (LMIO17_keliones) C++11
100 / 100
 294 ms 20076 KB 
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define int ll
const int mod = 1e9 + 7;
struct SegmentTree {
    vector<ll> tree;
    int n;
    SegmentTree(vector<int>& a) {
        n = a.size();
        tree.assign(2*n, 0);

        for(int i = n; i < 2*n; i++) {
            tree[i] = a[i-n];
        }
        for(int idx = n-1; idx > 0; idx--) {
            tree[idx] = tree[2*idx] + tree[2*idx+1];
        }
    }
    void update(int idx, ll val) {
        idx += n;
        tree[idx] = val;

        while(idx > 1) {
            idx /= 2;
            tree[idx] = tree[2*idx] + tree[2*idx+1];
            tree[idx] %= mod;
        }
    }
    ll getSum(int L, int R) {
        L += n;
        R += n;
        ll sum = 0;

        while(L < R) {
            if (L % 2) {
                sum += tree[L];
                sum %= mod;
                L++;
            }
            if (R % 2) {
                R--;
                sum += tree[R];
                sum %= mod;
            }
            L /= 2, R /= 2;
        }

        return sum;
    }
};
const int maxN = 200005;
vector<int> adj[maxN];

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
//    freopen("test.in", "r", stdin);
    int n, m;
    cin >> n >> m;
    vector<ll> add(n+1);
    for(int i = 0; i < n; i++) {
        cin >> add[i];
    }

    vector<ll> pref(n+1, 0);
    pref[0] = 0;
    for(int i = 1; i <= n; i++) {
        pref[i] = pref[i-1];
        pref[i] += add[i-1];
    }
    for(int i = 0; i < m; i++) {
        int a, b;
        cin >> a >> b;
        a--, b--;
        adj[b].push_back(a);
    }

    vector<int> a(n+1, 0);
    SegmentTree cnt(a), sum(a);
    for(int i = 0; i < n; i++) {
        cnt.update(i, cnt.getSum(0, i) + i);
        sum.update(i, sum.getSum(i, i+1) + sum.getSum(0, i) + pref[i]);
        for(int j : adj[i]) {
            cnt.update(i, cnt.getSum(i, i+1) - cnt.getSum(j, j+1) - 1);
            sum.update(i, sum.getSum(i, i+1) - add[j] - sum.getSum(j, j+1));
        }
        sum.update(i, sum.getSum(i, i+1) + (add[i] * cnt.getSum(i, i+1)) % mod);
    }
    cout << (sum.getSum(0, n) + mod) % mod;
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 4972 KB Output is correct
2 Correct 3 ms 4972 KB Output is correct
3 Correct 4 ms 4972 KB Output is correct
4 Correct 4 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 4972 KB Output is correct
7 Correct 4 ms 5120 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 4 ms 4972 KB Output is correct
10 Correct 4 ms 4972 KB Output is correct
11 Correct 4 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 4972 KB Output is correct
2 Correct 3 ms 4972 KB Output is correct
3 Correct 4 ms 4972 KB Output is correct
4 Correct 4 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 4972 KB Output is correct
7 Correct 4 ms 5120 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 4 ms 4972 KB Output is correct
10 Correct 4 ms 4972 KB Output is correct
11 Correct 4 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct
13 Correct 36 ms 6252 KB Output is correct
14 Correct 34 ms 6252 KB Output is correct
15 Correct 26 ms 6124 KB Output is correct
16 Correct 11 ms 5612 KB Output is correct
17 Correct 27 ms 6252 KB Output is correct
18 Correct 21 ms 5740 KB Output is correct
19 Correct 5 ms 5248 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 4 ms 5104 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct
23 Correct 5 ms 5100 KB Output is correct
24 Correct 5 ms 5100 KB Output is correct
25 Correct 4 ms 5100 KB Output is correct
26 Correct 4 ms 5100 KB Output is correct
27 Correct 7 ms 5228 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 6252 KB Output is correct
2 Correct 34 ms 6252 KB Output is correct
3 Correct 26 ms 6124 KB Output is correct
4 Correct 11 ms 5612 KB Output is correct
5 Correct 27 ms 6252 KB Output is correct
6 Correct 21 ms 5740 KB Output is correct
7 Correct 5 ms 5248 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5104 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 5 ms 5100 KB Output is correct
12 Correct 5 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 7 ms 5228 KB Output is correct
16 Correct 5 ms 4972 KB Output is correct
17 Correct 3 ms 4972 KB Output is correct
18 Correct 4 ms 4972 KB Output is correct
19 Correct 4 ms 4972 KB Output is correct
20 Correct 4 ms 4972 KB Output is correct
21 Correct 4 ms 4972 KB Output is correct
22 Correct 4 ms 5120 KB Output is correct
23 Correct 4 ms 4972 KB Output is correct
24 Correct 4 ms 4972 KB Output is correct
25 Correct 4 ms 4972 KB Output is correct
26 Correct 4 ms 4972 KB Output is correct
27 Correct 4 ms 4972 KB Output is correct
28 Correct 43 ms 7276 KB Output is correct
29 Correct 14 ms 5740 KB Output is correct
30 Correct 27 ms 6508 KB Output is correct
31 Correct 14 ms 5740 KB Output is correct
32 Correct 7 ms 5356 KB Output is correct
33 Correct 8 ms 5356 KB Output is correct
34 Correct 33 ms 6124 KB Output is correct
35 Correct 59 ms 6764 KB Output is correct
36 Correct 43 ms 6764 KB Output is correct

Subtask #4
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 6252 KB Output is correct
2 Correct 34 ms 6252 KB Output is correct
3 Correct 26 ms 6124 KB Output is correct
4 Correct 11 ms 5612 KB Output is correct
5 Correct 27 ms 6252 KB Output is correct
6 Correct 21 ms 5740 KB Output is correct
7 Correct 5 ms 5248 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5104 KB Output is correct
10 Correct 4 ms 5100 KB Output is correct
11 Correct 5 ms 5100 KB Output is correct
12 Correct 5 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 7 ms 5228 KB Output is correct
16 Correct 43 ms 7276 KB Output is correct
17 Correct 14 ms 5740 KB Output is correct
18 Correct 27 ms 6508 KB Output is correct
19 Correct 14 ms 5740 KB Output is correct
20 Correct 7 ms 5356 KB Output is correct
21 Correct 8 ms 5356 KB Output is correct
22 Correct 33 ms 6124 KB Output is correct
23 Correct 59 ms 6764 KB Output is correct
24 Correct 43 ms 6764 KB Output is correct
25 Correct 5 ms 4972 KB Output is correct
26 Correct 3 ms 4972 KB Output is correct
27 Correct 4 ms 4972 KB Output is correct
28 Correct 4 ms 4972 KB Output is correct
29 Correct 4 ms 4972 KB Output is correct
30 Correct 4 ms 4972 KB Output is correct
31 Correct 4 ms 5120 KB Output is correct
32 Correct 4 ms 4972 KB Output is correct
33 Correct 4 ms 4972 KB Output is correct
34 Correct 4 ms 4972 KB Output is correct
35 Correct 4 ms 4972 KB Output is correct
36 Correct 4 ms 4972 KB Output is correct
37 Correct 190 ms 17956 KB Output is correct
38 Correct 154 ms 16108 KB Output is correct
39 Correct 176 ms 17132 KB Output is correct
40 Correct 294 ms 18412 KB Output is correct
41 Correct 155 ms 16236 KB Output is correct
42 Correct 225 ms 18112 KB Output is correct
43 Correct 146 ms 17516 KB Output is correct
44 Correct 200 ms 19948 KB Output is correct
45 Correct 229 ms 20076 KB Output is correct