delete pics to save space

2.509.cpp

@@ -0,0 +1,76 @@
+#include<cstdio>
+#include<cstring>
+using namespace std;
+const int maxn=6500;
+int d,s,b,n,kase;
+char data[7][maxn];
+bool parity;
+bool read()
+{
+    scanf("%d%d%d\n",&d,&s,&b);
+    if(!d) return false;
+    memset(data,0,sizeof(data));
+    parity=getchar()=='O',n=s*b;
+    for(int i=0;i<d;++i)
+        scanf("%s",data[i]);
+    return true;
+}
+bool solve()
+{
+    for(int i;i<n;++i)
+	{
+        bool k=false;
+        int broke=-1;
+        for(int j=0;j<d;++j)
+		{
+            char& c=data[j][i];
+            if(c=='1') k=!k;
+            if(c=='x')
+			{
+                if(broke!=-1) return false;
+                else broke=j;
+            }
+        }
+        if(broke==-1&&k!=parity) return false;
+        if(broke!=-1) data[broke][i]=k==parity?'0':'1';
+    }
+    return true;
+}
+void print(bool v)
+{
+    if(!v)
+	{
+		printf("invalid.\n");
+		return;
+	}
+    printf("valid, contents are: ");
+    int num=0,cnt=0,pos;
+    for(int i=0;i<b;++i)
+	{
+        pos=i*s;
+        for(int j=0;j<d;++j)
+		{
+            if(i%d==j) continue;
+            for(int k=0;k<s;++k)
+			{
+                num<<=1,num+=data[j][pos+k]=='1',++cnt;
+                if((cnt%=4)==0) printf("%X",num),num=0;
+            }
+        }
+    }
+    if(cnt) printf("%X",num<<(4-cnt));
+    printf("\n");
+    return;
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+    while(read())
+	{
+        printf("Disk set %d is ",++kase);
+        print(solve());
+    }
+    return 0;
+}