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coordinate.cpp
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#include "funcs.h"
int xy2cr(int xy, int block_size) {
int cr;
if (xy < block_size)
cr = 0;
else if (xy > 19 * block_size)
cr = 18;
else
cr = (xy + block_size / 2) / block_size - 1;
return cr;
}
/*
0.right,1.rightup,2.up,3.leftup,4.left,5.leftdown,6.down,7.rightdown
*/
int changerow(int row, int dir) {
switch (dir) {
case 5:
case 6:
case 7:
return row + 1;
case 1:
case 2:
case 3:
return row - 1;
default:
return row;
}
}
int changecol(int col, int dir) {
switch (dir) {
case 0:
case 1:
case 7:
return col + 1;
case 3:
case 4:
case 5:
return col - 1;
default:
return col;
}
}
void changerowcol(int& row, int& col, int dir) {
row = changerow(row, dir);
col = changecol(col, dir);
}
bool overboard(int row, int col) {
if (row<0 || row>18 || col<0 || col>18) return true;
return false;
}
int basicspread1(vector<vector<int>>& board, int row, int col, int current_player, int dir) {
int spread=0;
changerowcol(row,col,dir);
while (!overboard(row,col) && board[row][col]==current_player) {
++spread;
changerowcol(row,col,dir);
}
return spread;
}
int livespread1(vector<vector<int>>& board, int row, int col, int current_player, int dir, bool canjump) {
int spread = 0;
changerowcol(row, col, dir);
while (!overboard(row, col) && board[row][col] == current_player) {
++spread;
changerowcol(row, col, dir);
}
if (!overboard(row, col) && board[row][col] == 0) {
if (canjump) {
int jump_spread = livespread1(board, row, col, current_player, dir, false);
if (jump_spread != -1)
spread += jump_spread;
}
}
else spread = -1; //dead
return spread;
}
int deadspread1(vector<vector<int>>& board, int row, int col, int current_player, int dir, bool canjump) {
int spread = 0;
changerowcol(row, col, dir);
while (!overboard(row, col) && board[row][col] == current_player) {
++spread;
changerowcol(row, col, dir);
}
if (!overboard(row, col) && board[row][col] == 0) {
if (canjump) {
int jump_spread = deadspread1(board, row, col, current_player, dir, false);
if (jump_spread == -1)
spread = -1; //live
else
spread += jump_spread;
}
else spread = -1; //live
}
return spread;
}
int basicspread2(vector<vector<int>>& board,int row,int col,int current_player,int dir) {
int dir2 = (dir + 4) % 8;
return basicspread1(board,row,col,current_player,dir)+basicspread1(board,row,col,current_player,dir2)+1;
}
int livespread2(vector<vector<int>>& board, int row, int col, int current_player, int dir) {
int dir2 = (dir + 4) % 8;
int canjump1 = livespread1(board, row, col, current_player, dir, true);
int canjump2 = livespread1(board, row, col, current_player, dir2, true);
int notjump1 = livespread1(board, row, col, current_player, dir, false);
int notjump2 = livespread1(board, row, col, current_player, dir2, false);
int ans1=-1,ans2=-1,ans3=-1;
if (canjump1!=-1 && notjump2!=-1) ans1=canjump1+notjump2+1;
if (canjump2!=-1 && notjump1!=-1) ans2=canjump2+notjump1+1;
if (notjump1!=-1 && notjump2!=-1) ans3=notjump1+notjump2+1;
return max(max(ans1,ans2),ans3);
}
int deadspread2(vector<vector<int>>& board, int row, int col, int current_player, int dir) {
int dir2 = (dir + 4) % 8;
int dead_canjump1 = deadspread1(board, row, col, current_player, dir, true);
int dead_canjump2 = deadspread1(board, row, col, current_player, dir2, true);
int dead_notjump1 = deadspread1(board, row, col, current_player, dir, false);
int dead_notjump2 = deadspread1(board, row, col, current_player, dir2, false);
int live_canjump1 = livespread1(board, row, col, current_player, dir, true);
int live_canjump2 = livespread1(board, row, col, current_player, dir2, true);
int live_notjump1 = livespread1(board, row, col, current_player, dir, false);
int live_notjump2 = livespread1(board, row, col, current_player, dir2, false);
if (live_canjump1 != -1 && dead_notjump2 != -1) return live_canjump1 + dead_notjump2 + 1;
if (dead_canjump1 != -1 && live_notjump2 != -1) return dead_canjump1 + live_notjump2 + 1;
if (live_notjump1 != -1 && dead_canjump2 != -1) return live_notjump1 + dead_canjump2 + 1;
if (dead_notjump1 != -1 && live_canjump2 != -1) return dead_notjump1 + live_canjump2 + 1;
return -1; //both dead or both live
}
bool availover5(vector<vector<int>>&board,int row,int col,int current_player,int dir) {
int row_copy=row,col_copy=col;
int count=0;
int dir2=(dir+4)%8;
changerowcol(row_copy,col_copy,dir);
while (!overboard(row_copy,col_copy)&&board[row_copy][col_copy]!=3-current_player) {
++count;
if (count>=5) return true;
changerowcol(row_copy,col_copy,dir);
}
row_copy=row; col_copy=col;
changerowcol(row_copy,col_copy,dir2);
while (!overboard(row_copy,col_copy)&&board[row_copy][col_copy]!=3-current_player) {
++count;
if (count>=5) return true;
changerowcol(row_copy,col_copy,dir2);
}
return false;
}
bool live3(vector<vector<int>>& board, int row, int col, int current_player, int dir) {
return livespread2(board, row, col, current_player, dir) == 3 && availover5(board,row,col,current_player,dir);
}
bool doublelive3(vector<vector<int>>& board, int row, int col, int current_player) {
int num = 0;
for (int dir = 0; dir < 4; ++dir) {
if (live3(board, row, col, current_player, dir)) ++num;
if (num == 2) return true;
}
return false;
}
bool any4(vector<vector<int>>& board, int row, int col, int current_player, int dir) {
int live = livespread2(board, row, col, current_player, dir);
int dead = deadspread2(board, row, col, current_player, dir);
return live == 4 || dead == 4;
}
bool live4(vector<vector<int>>& board,int row,int col,int current_player,int dir) {
int dir2=(dir+4)%8;
return livespread1(board,row,col,current_player,dir,false)+livespread1(board,row,col,current_player,dir2,false)+1==4;
}
bool strict5(vector<vector<int>>& board,int row,int col,int current_player,int dir) {
return basicspread2(board,row,col,current_player,dir)==5;
}
bool dead5(vector<vector<int>>& board,int row,int col,int current_player,int dir) {
// 011112
int dir2 = (dir + 4) % 8;
int dead1 = deadspread1(board,row,col,current_player,dir,false);
int dead2 = deadspread1(board,row,col,current_player,dir2,false);
int basic1 = basicspread1(board,row,col,current_player,dir);
int basic2 = basicspread1(board,row,col,current_player,dir2);
if (basic1==0 && dead2==4) return true;
if (basic2==0 && dead1==4) return true;
if (basic1*basic2>0 && basic1+basic2==4) return true;
return false;
}
bool lost5(vector<vector<int>>& board,int row,int col,int current_player,int dir) {
// 011110
int dir2 = (dir + 4) % 8;
int live1 = livespread1(board,row,col,current_player,dir,false);
int live2 = livespread1(board,row,col,current_player,dir2,false);
int basic1 = basicspread1(board,row,col,current_player,dir);
int basic2 = basicspread1(board,row,col,current_player,dir2);
if (basic1==0 && live2==4) return true;
if (basic2==0 && live1==4) return true;
return false;
}
bool longconnect_dir(vector<vector<int>>& board,int row,int col,int current_player,int dir) {
return basicspread2(board,row,col,current_player,dir)>5;
}
bool longconnect(vector<vector<int>>& board,int row,int col,int current_player) {
for (int dir=0;dir<4;++dir) {
if (longconnect_dir(board,row,col,current_player,dir))
return true;
}
return false;
}
bool double4_inline(vector<vector<int>>& board, int row, int col, int current_player, int dir) {
int dir2 = (dir + 4) % 8;
int canjump1 = livespread1(board, row, col, current_player, dir, true);
int canjump2 = livespread1(board, row, col, current_player, dir2, true);
int notjump1 = livespread1(board, row, col, current_player, dir, false);
int notjump2 = livespread1(board, row, col, current_player, dir2, false);
if (canjump1!=notjump1 && canjump2!=notjump2 && canjump1+notjump2+1==4 && canjump2+notjump1+1==4)
return true;
return false;
}
bool double4(vector<vector<int>>& board, int row, int col, int current_player) {
int num = 0;
for (int dir=0;dir<4;++dir) {
if (any4(board,row,col,current_player,dir)) ++num;
if (num == 2 || double4_inline(board, row, col, current_player, dir)) return true;
}
return false;
}
bool banned(vector<vector<int>>& board,int row,int col,int current_player) {
for (int dir=0;dir<4;++dir)
if (strict5(board,row,col,current_player,dir))
return false;
if (doublelive3(board,row,col,current_player) || double4(board,row,col,current_player) || longconnect(board,row,col,current_player))
return true;
return false;
}