#include "hexagon.h"
#include "grader.cpp"
#include <vector>
using namespace std;
#define ll long long
const ll mod=1e9+7;
ll powmod(ll a,ll b,ll mod)
{
if(b==0)
{
return 1;
}
if(b==1)
{
return a;
}
ll cp=powmod(a,b/2,mod);
cp=(cp*cp)%mod;
if(b%2)
{
cp=(cp*a)%mod;
}
return cp;
}
int draw_territory(int N, int A, int B,std::vector<int> D, std::vector<int> L) {
ll total_cell=L[0]+1,two=2;
total_cell=(((total_cell*(total_cell+1))%mod)*powmod(two,mod-2,mod))%mod;
ll ap=A;
ll ans=(total_cell*ap)%mod;
// cell with distance i are i+1
// So (i*b)*(i+1)
// Sum of ((i*(i+1))) *b
ll app=total_cell*(total_cell-1);
app%=mod;
app*=(total_cell+1);
app%=mod;
app=(app*powmod(3,mod-2,mod))%mod;
ll pb=B;
ll po=(app*pb)%mod;
// (i+1 C 2) = 2**(i+2)
ans=(ans+po)%mod;
return ans;
// return (total_cell*ap)%mod;
}
Compilation message
/usr/bin/ld: /tmp/ccT926Pd.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccQshuQd.o:hexagon.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
