oj.uz

Submission #1013557

# Submission time Handle Problem Language Result Execution time Memory
1013557 2024-07-03T16:17:40 Z daffuwu Fancy Fence (CEOI20_fancyfence) C++14
30 / 100
 19 ms 5576 KB 
#include <bits/stdc++.h>
using namespace std;
#define fr first
#define sc second
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

long long n, h[100069], w[100069], smw, ans, mn, sm, pv, cur;
const long long dv = 1e9+7;
vector<pair<long long, long long> > vc;

long long calc(long long a, long long b)
{
    if (a%2 == 0) a/=2;
    else b/=2;
    return a%dv*(b%dv)%dv;
}

int main() 
{
    long long i, j, up, dw;
    scanf("%lld", &n);
    for (i=1; i<=n; i++)
    {
        scanf("%lld", h+i);
    }
    for (i=1; i<=n; i++)
    {
        scanf("%lld", w+i);
        if (i>1 && h[i] != h[i-1])
        {
            vc.push_back({smw, h[i-1]});
            smw = 0;
        }
        smw += w[i];
        sm += w[i];
    }
    vc.push_back({smw, h[n]});
    cur = sm;
    for (auto [wg, hg]:vc)
    {
        ans += calc(cur, cur+1)*((calc(hg, hg+1)-calc(pv, pv+1))%dv)%dv;
        pv = hg;
        cur -= wg;
        ans %= dv;
    }
    if (ans<0) ans += dv;
    printf("%lld\n", ans);  
}

Compilation message

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:39:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   39 |     for (auto [wg, hg]:vc)
      |               ^
fancyfence.cpp:20:18: warning: unused variable 'j' [-Wunused-variable]
   20 |     long long i, j, up, dw;
      |                  ^
fancyfence.cpp:20:21: warning: unused variable 'up' [-Wunused-variable]
   20 |     long long i, j, up, dw;
      |                     ^~
fancyfence.cpp:20:25: warning: unused variable 'dw' [-Wunused-variable]
   20 |     long long i, j, up, dw;
      |                         ^~
fancyfence.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     scanf("%lld", &n);
      |     ~~~~~^~~~~~~~~~~~
fancyfence.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         scanf("%lld", h+i);
      |         ~~~~~^~~~~~~~~~~~~
fancyfence.cpp:28:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         scanf("%lld", w+i);
      |         ~~~~~^~~~~~~~~~~~~

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 8 ms 1116 KB Output is correct
4 Correct 16 ms 1780 KB Output is correct
5 Correct 16 ms 1884 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2 ms 548 KB Output is correct
4 Correct 8 ms 1116 KB Output is correct
5 Correct 16 ms 1808 KB Output is correct
6 Correct 16 ms 1884 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 2 ms 1116 KB Output is correct
9 Correct 9 ms 2516 KB Output is correct
10 Correct 19 ms 5576 KB Output is correct
11 Correct 19 ms 5572 KB Output is correct
12 Correct 0 ms 344 KB Output is correct

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 372 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -