oj.uz

Submission #303406

# Submission time Handle Problem Language Result Execution time Memory
303406 2020-09-20T09:43:37 Z BeanZ Fancy Fence (CEOI20_fancyfence) C++14
100 / 100
 37 ms 5120 KB 
// I_Love_LPL
#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define endl '\n'
const int N = 1e5 + 5;
const int mod = 1e9 + 7;
ll h[N], w[N], sum[N], g[N];
ll dp[N];
int main(){
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        if (fopen("A.inp", "r")){
                freopen("test.inp", "r", stdin);
                freopen("test.out", "w", stdout);
        }
        ll n;
        cin >> n;
        ll ans = 0;
        for (int i = 1; i <= n; i++) cin >> h[i];
        for (int i = 1; i <= n; i++) cin >> w[i], g[i] = (g[i - 1] + w[i]) % mod;
        h[0] = 0;
        stack<ll> s;
        s.push(0);
        for (int i = 1; i <= n; i++){
                while (s.size()){
                        if (h[s.top()] > h[i]) s.pop();
                        else break;
                }
                dp[i] = (w[i] * (w[i] + 1) / 2) % mod * ((h[i] * (h[i] + 1) / 2) % mod) % mod;
                sum[i] = sum[s.top()] + (g[i - 1] - g[s.top()] + mod) % mod * ((h[i] * (h[i] + 1) / 2) % mod) % mod;
                dp[i] = (dp[i] + sum[i] * w[i]) % mod;
                ans = (ans + dp[i]) % mod;
                sum[i] = (sum[i] + ((h[i] * (h[i] + 1) / 2) % mod) * w[i] % mod) % mod;
                s.push(i);
        }
        cout << ans;
}
/*
2
2 2
2 4

3
1 3 2
2 2 2
*/

Compilation message

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:16:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   16 |                 freopen("test.inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
fancyfence.cpp:17:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   17 |                 freopen("test.out", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 14 ms 2560 KB Output is correct
4 Correct 26 ms 4856 KB Output is correct
5 Correct 26 ms 4736 KB Output is correct
6 Correct 26 ms 4344 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 4 ms 768 KB Output is correct
3 Correct 19 ms 2688 KB Output is correct
4 Correct 32 ms 5120 KB Output is correct
5 Correct 35 ms 5112 KB Output is correct
6 Correct 0 ms 384 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 4 ms 768 KB Output is correct
4 Correct 16 ms 2688 KB Output is correct
5 Correct 32 ms 5116 KB Output is correct
6 Correct 34 ms 5112 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 5 ms 768 KB Output is correct
9 Correct 17 ms 2688 KB Output is correct
10 Correct 31 ms 5112 KB Output is correct
11 Correct 31 ms 5112 KB Output is correct
12 Correct 1 ms 416 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 13 ms 2432 KB Output is correct
12 Correct 25 ms 4856 KB Output is correct
13 Correct 25 ms 4608 KB Output is correct
14 Correct 25 ms 4344 KB Output is correct
15 Correct 1 ms 416 KB Output is correct
16 Correct 4 ms 768 KB Output is correct
17 Correct 16 ms 2688 KB Output is correct
18 Correct 34 ms 5112 KB Output is correct
19 Correct 36 ms 5112 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 4 ms 768 KB Output is correct
22 Correct 17 ms 2688 KB Output is correct
23 Correct 30 ms 5120 KB Output is correct
24 Correct 32 ms 5120 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 4 ms 768 KB Output is correct
31 Correct 4 ms 768 KB Output is correct
32 Correct 16 ms 2304 KB Output is correct
33 Correct 16 ms 2304 KB Output is correct
34 Correct 30 ms 4216 KB Output is correct
35 Correct 33 ms 4216 KB Output is correct
36 Correct 33 ms 4224 KB Output is correct
37 Correct 37 ms 4344 KB Output is correct
38 Correct 0 ms 384 KB Output is correct
39 Correct 32 ms 4344 KB Output is correct
40 Correct 33 ms 4268 KB Output is correct
41 Correct 35 ms 4344 KB Output is correct
42 Correct 32 ms 4548 KB Output is correct