From 9f8bb63d075ca87da8716bea6b66e69a3523d800 Mon Sep 17 00:00:00 2001
From: Aditya Naik
Date: Sun, 13 May 2018 04:21:01 -0400
Subject: addbishopattack works

---
 10284/fen2.cpp | 124 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)

diff --git a/10284/fen2.cpp b/10284/fen2.cpp
index 53f02e6..1f238b5 100644
--- a/10284/fen2.cpp
+++ b/10284/fen2.cpp
@@ -2,12 +2,136 @@
 #include <string>
 using namespace std;
 
+void addattack(int, int, int[][8]);
+void addbishopattack(int, int, int[][8]);
+
 int main(){
     string fen;
 
     while(cin>>fen){
 	int board[8][8] = {0};
+	int j=0, i=0, gap;
+	for(int fenindex=0; fenindex<fen.length(); fenindex++){
+	    if(fen[fenindex]=='/'){
+		i++; j=0;
+		continue;
+	    }
+	    else if((int)fen[fenindex]<=56 && (int)fen[fenindex]>=49){
+		gap=j+(int)fen[fenindex] % 48;
+		for(;j<gap; j++);		    
+	    }
+	    else{
+		board[i][j++] = (int)fen[fenindex];
+	    }
+	}
+	
+	for(int i=0; i<8; i++){
+	    for(int j=0; j<8; j++){
+		if(board[i][j]>0){		    
+		    addattack(i, j, board);
+		}
+	    }
+	}
 	
+	int counter=0;
+	for(int i=0;i<8;i++)
+	    for(int j=0;j<8;j++)
+		if(board[i][j]==0)
+		    counter++;
+	cout<<counter<<endl;	
 	
     }
+    
+}
+
+void addattack(int i, int j, int board[][8]){
+    
+    //PAWNS
+    if(board[i][j]==112){ //p
+	if(i+1<8 && j-1>=0 && board[i+1][j-1]==0)
+	    board[i+1][i-1]=1;
+	if(i+1<8 && j+1<=7 && board[i+1][j+1]==0)
+	    board[i+1][j+1]=1;
+    }
+    else if(board[i][j]==80){//P
+	if(i-1>=0 && j+1<=7 && board[i-1][j+1]==0)
+	    board[i-1][j+1]=0;
+	if(i-1>=0 && j-1>=0 && board[i-1][j-1]==0)
+	    board[i-1][j-1]=1;
+    }
+    
+    //KNIGHTS
+    else if(board[i][j]==110 || board[i][j]==78) { 
+	if(i+2<=7 && j+1<=7 && board[i+2][j+1]==0) board[i+2][j+1]=1;
+	if(i+2<=7 && j-1>=0 && board[i+2][j-1]==0) board[i+2][j-1]=1;
+	if(i-2>=0 && j+1<=7 && board[i-2][j+1]==0) board[i-2][j+1]=1;
+	if(i-2>=0 && j-1>=0 && board[i-2][j-1]==0) board[i-2][j-1]=1;
+
+	if(j+2<=7 && i+1<=7 && board[i+1][j+2]==0) board[i+1][j+2]=1;
+	if(j+2<=7 && i-1>=0 && board[i-1][j+2]==0) board[i-1][j+2]=1;
+	if(j-2>=0 && i+1<=7 && board[i+1][j-2]==0) board[i+1][j-2]=1;
+	if(j-2>=0 && i-1>=0 && board[i-1][j-2]==0) board[i-1][j-2]=1;    
+    }
+
+    //KINGS
+    else if(board[i][j]==75 || board[i][j]==107) {
+	if(j+1<=7 && board[i][j+1]==0) board[i][j+1]=1;
+	if(j-1>=0 && board[i][j-1]==0) board[i][j-1]=1;
+
+	if(i+1<=7){
+	    if(board[i+1][j]==0) board[i+1][j]=1;
+	    if(j+1<=7 && board[i+1][j+1]==0)  board[i+1][j+1]=1;
+	    if(j-1>=0 && board[i+1][j-1]==0) board[i+1][j-1]=1;
+	}
+	if(i-1>=0){
+	    if(board[i-1][j]==0) board[i-1][j]=1;
+	    if(j+1<=7 && board[i-1][j+1]==0) board[i-1][j+1]=1;
+	    if(j-1>=0 && board[i-1][j-1]==0) board[i-1][j-1]=1;
+	}
+    }
+
+    //BISHOPS
+    else if(board[i][j]==98 || board[i][j]==66){
+	addbishopattack(i, j, board);
+    }
+
+}
+
+
+void addbishopattack(int i, int j, int board[][8]){
+    bool conf=false;
+    int trow=i, tcol=j;
+    while(!conf){
+	tcol++;trow++;
+	if(tcol>=8 || trow>=8 || (board[trow][tcol]!=0 && board[trow][tcol]!=1))
+	    conf=true;
+	else board[trow][tcol]=1;
+    }
+    
+    conf=false;
+    trow=i;tcol=j;
+    while(!conf){
+	tcol++;trow--;
+	if(tcol>=8 || trow<0 || (board[trow][tcol]!=0 && board[trow][tcol]!=1))
+	    conf=true;
+	else board[trow][tcol]=1;
+    }
+    
+    conf=false;
+    trow=i; tcol=j;
+    while(!conf){
+	tcol--;trow--;
+	if(tcol<0 || trow<0 || (board[trow][tcol]!=0 && board[trow][tcol]!=1))
+	    conf=true;
+	else board[trow][tcol]=1;
+    }
+    
+    conf=false;
+    trow=i; tcol=j;
+    while(!conf){
+	tcol--;trow++;
+	if(tcol<0 || trow>=8 || (board[trow][tcol]!=0 && board[trow][tcol]!=1))
+	    conf=true;
+	else board[trow][tcol]=1;
+    }
 }
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