Submission #440434

#	Time	Username	Problem	Language	Result	Execution time	Memory
440434		sam571128	Hexagonal Territory (APIO21_hexagon)	C++17	30 / 100	55 ms	7784 KiB

hexagon

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

#define ll long long

using namespace std;


int draw_territory(int N, int A, int B, vector<int> D, vector<int> L) {
    ll x[N+1], y[N+1], nowx = 0, nowy = 0, MOD = 1e9+7, peri = 0;
    x[0] = y[0] = 0;
    for(int i = 1;i <= N;i++){
        if(D[i-1]==1) nowy += L[i-1];
        if(D[i-1]==2) nowx += L[i-1], nowy += L[i-1];
        if(D[i-1]==3) nowx += L[i-1];
        if(D[i-1]==4) nowy -= L[i-1];
        if(D[i-1]==5) nowx -= L[i-1], nowy -= L[i-1];
        if(D[i-1]==6) nowx -= L[i-1];
        x[i] = nowx, y[i] = nowy;
        peri = (peri+L[i-1])%MOD;
    }

    ll ans = 0;

    for(int i = 0;i <= N;i++){
        ans += x[i]*y[i+1]-x[i+1]*y[i];
    }

    ans = ((((abs(ans)-peri)/2 + 1)%MOD + MOD)%MOD + peri)%MOD;
    return (int)(ans*A%MOD);
}


//Subtask: B=0 => count the area 

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