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Submission #394952

# Submission time Handle Problem Language Result Execution time Memory
394952 2021-04-27T14:21:42 Z Pichon5 Fancy Fence (CEOI20_fancyfence) C++17
15 / 100
 90 ms 4428 KB 
#include<bits/stdc++.h>
#define lcm(a,b) (a/__gcd(a,b))*b
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ll long long int
#define vi vector<int>
#define vll vector<ll>
#define pb push_back
#define F first
#define S second
#define mp make_pair
//salida rapida "\n"
//DECIMALES fixed<<sp(n)<<x<<endl;
//gcd(a,b)= ax + by
//lCB x&-x
//set.erase(it) - ersases the element present at the required index//auto it = s.find(element)
//set.find(element) - iterator pointing to the given element if it is present else return pointer pointing to set.end()
//set.lower_bound(element) - iterator pointing to element greater than or equal to the given element
//set.upper_bound(element) - iterator pointing to element greater than the given element
// | ^
//__builtin_popcount(x)
using namespace std;
const ll MOD=1e9+7;
vll h,w;
ll bin(ll x){
    return ((x*(x+1))/2)%MOD;
}
ll T(ll x,ll y){
    return (bin(x)%MOD*bin(y)%MOD)%MOD;
}
int main()
{ 
    int n,x;
    cin>>n;
    ll y;
    for(int i=0;i<n;i++){
        cin>>x;
        y=x;
        h.pb(x);
    }
    ll sum=0;
    for(int i=0;i<n;i++){
        cin>>x;
        sum+=x;
        sum%=MOD;
        w.pb(x);
    }
    ll res=0;
    cout<<T(sum,y)<<endl;
    /*for(int i=0;i<n;i++){
        ll Hmin=h[i];
        res+=T(h[i],w[i]);
        res%=MOD;
        for(int l=i+1;l<n;l++){
            Hmin=min(Hmin,h[l]);
            res+=T(Hmin,w[i]+w[l]);res%=MOD;
            res-=T(Hmin,w[i]);
            res-=T(Hmin,w[l]);
        }
    }*/
    //cout<<res<<endl;

    
    return 0;
}

Compilation message

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:47:8: warning: unused variable 'res' [-Wunused-variable]
   47 |     ll res=0;
      |        ^~~
fancyfence.cpp:25:15: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
   25 |     return ((x*(x+1))/2)%MOD;
      |             ~~^~~~~~~
fancyfence.cpp:34:8: note: 'y' was declared here
   34 |     ll y;
      |        ^

Subtask #1
0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 12 ms 716 KB Output is correct
3 Correct 43 ms 2416 KB Output is correct
4 Correct 89 ms 4276 KB Output is correct
5 Correct 90 ms 4428 KB Output is correct
6 Correct 1 ms 204 KB Output is correct

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 208 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -