Submission #1063833

#	Time	Username	Problem	Language	Result	Execution time	Memory
1063833		12345678	Hexagonal Territory (APIO21_hexagon)	C++17	9 / 100	1 ms	600 KiB

hexagon

#include "hexagon.h"
#include <bits/stdc++.h>

using namespace std;

#define ll long long

const ll mod=1e9+7;

ll a, b, k;

ll binpow(ll vl, ll idx)
{
    if (idx==0) return 1;
    ll tmp=binpow(vl, idx/2);
    if (idx%2) return (((tmp*tmp)%mod)*vl)%mod;
    else return (tmp*tmp)%mod;
}

int draw_territory(int N, int A, int B, std::vector<int> D, std::vector<int> L) {
    a=A, b=B, k=L[0]+1;
    ll x=((((k)*(k+1)/2)%mod)*a)%mod;
    //cout<<"binpow "<<binpow(6, mod-2)<<'\n';
    //cout<<"rev "<<(binpow(6, mod-2)*6)%mod<<'\n';
    ll y=(((((((b*(k-1))%mod)*(k))%mod)*(2*k-1))%mod)*binpow(6, mod-2))%mod;
    //cout<<"here "<<y<<'\n';
    y=(((y+(((k)*(k-1)/2)%mod)*b)%mod)%mod+mod)%mod;
    return (x+y)%mod;
}

• Subtask 1: 3 / 3
• Subtask 2: 6 / 6
• Subtask 3: 0 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 15
• Subtask 6: 0 / 19
• Subtask 7: 0 / 18
• Subtask 8: 0 / 16