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Submission #528307

# Submission time Handle Problem Language Result Execution time Memory
528307 2022-02-19T21:24:07 Z Deepesson Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 83 ms 3864 KB 
#include <bits/stdc++.h>
using ll = long long;
const ll MOD = 1e9+7;
typedef std::pair<ll,ll> pii;
ll gaussian(ll x){
    return ((x*(x+1LL))/2LL)%MOD;
}
ll get_local(pii u){
    return (gaussian(u.first)*gaussian(u.second))%MOD;
}
ll get_total(pii u){
    return (gaussian(u.first)*u.second)%MOD;
}
int main()
{
    ll ans=0;
    ll temp=0;
    int N;std::cin>>N;
    long long a[N],b[N];
    for(auto&x:a)std::cin>>x;
    for(auto&x:b)std::cin>>x;
    std::deque<pii> stack;
    for(int i=0;i!=N;++i){
        ll alpha=a[i],beta=b[i];
        pii local = {alpha,beta};
        ans=(ans+get_local(local))%MOD;
        ll k=0;
        while(stack.size()){
            auto __ = stack.back();
            if(__.first>=alpha){
                k=(k+stack.back().second)%MOD;
                temp-=get_total(stack.back());
                if(temp<0)temp+=MOD;
                local.second=(local.second+stack.back().second)%MOD;
                stack.pop_back();
            }else break;
        }
        ans=(ans+(((k*b[i])%MOD)*gaussian(alpha)))%MOD;
        ans=((((temp*b[i])+ans)%MOD))%MOD;
        stack.push_back(local);
        temp=(temp+get_total(local))%MOD;
    }
    std::cout<<ans<<"\n";
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 296 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 288 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 292 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 324 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 31 ms 1364 KB Output is correct
4 Correct 51 ms 2196 KB Output is correct
5 Correct 54 ms 2220 KB Output is correct
6 Correct 50 ms 2116 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 304 KB Output is correct
2 Correct 11 ms 588 KB Output is correct
3 Correct 45 ms 1432 KB Output is correct
4 Correct 71 ms 2188 KB Output is correct
5 Correct 80 ms 2200 KB Output is correct
6 Correct 0 ms 204 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 9 ms 588 KB Output is correct
4 Correct 40 ms 1384 KB Output is correct
5 Correct 83 ms 2208 KB Output is correct
6 Correct 77 ms 2116 KB Output is correct
7 Correct 1 ms 296 KB Output is correct
8 Correct 8 ms 716 KB Output is correct
9 Correct 39 ms 1716 KB Output is correct
10 Correct 70 ms 3804 KB Output is correct
11 Correct 76 ms 3864 KB Output is correct
12 Correct 1 ms 292 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 288 KB Output is correct
6 Correct 0 ms 248 KB Output is correct
7 Correct 0 ms 396 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 304 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 2 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 296 KB Output is correct
3 Correct 1 ms 288 KB Output is correct
4 Correct 1 ms 304 KB Output is correct
5 Correct 1 ms 292 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 296 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 26 ms 1368 KB Output is correct
12 Correct 51 ms 2116 KB Output is correct
13 Correct 57 ms 2108 KB Output is correct
14 Correct 60 ms 2132 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 8 ms 540 KB Output is correct
17 Correct 39 ms 1476 KB Output is correct
18 Correct 75 ms 2116 KB Output is correct
19 Correct 81 ms 2192 KB Output is correct
20 Correct 1 ms 308 KB Output is correct
21 Correct 8 ms 764 KB Output is correct
22 Correct 38 ms 1732 KB Output is correct
23 Correct 73 ms 3836 KB Output is correct
24 Correct 72 ms 3780 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 296 KB Output is correct
27 Correct 1 ms 292 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 9 ms 588 KB Output is correct
31 Correct 8 ms 544 KB Output is correct
32 Correct 34 ms 1348 KB Output is correct
33 Correct 37 ms 1420 KB Output is correct
34 Correct 68 ms 2164 KB Output is correct
35 Correct 83 ms 2224 KB Output is correct
36 Correct 79 ms 2104 KB Output is correct
37 Correct 74 ms 2180 KB Output is correct
38 Correct 0 ms 204 KB Output is correct
39 Correct 74 ms 2104 KB Output is correct
40 Correct 75 ms 2184 KB Output is correct
41 Correct 77 ms 2376 KB Output is correct
42 Correct 79 ms 2988 KB Output is correct