Initiate Luogu

Luogu/P1002过河卒.cpp

@@ -0,0 +1,63 @@
+#include <iostream>
+using namespace std;
+int main(){
+    int n,m,max,may;
+    cin>>n>>m>>may>>max;
+    long long a[22][22];
+    //reset to 0
+    for(int i=0;i<22;i++){
+        for(int j=0;j<22;j++){
+            a[i][j]=0;
+        }
+    }
+    for(int i = 0; i < 22; i++){
+        a[0][i]=1;
+        a[i][0]=1;
+    }
+    a[may][max]=-1;
+    if((may-1)>=0&&(max-2)>=0)	a[may-1][max-2]=-1;
+    if((may-2)>=0&&(max-1)>=0)	a[may-2][max-1]=-1;
+    if((may-2)>=0&&(max+1)<=21)	a[may-2][max+1]=-1;
+    if((may-1)>=0&&(max+2)<=21)	a[may-1][max+2]=-1;
+    if((may+1)<=21&&(max+2)<=21)	a[may+1][max+2]=-1;
+    if((may+2)<=21&&(max+1)<=21)	a[may+2][max+1]=-1;
+    if((may+2)<=21&&(max-1)>=0)	a[may+2][max-1]=-1;
+    if((may+1)<=21&&(max-2)>=0)	a[may+1][max-2]=-1;
+    for(int i=0;i<22;i++){
+    	if(a[i][0]==-1){
+    		for(int j=i;j<22;j++){
+    			a[j][0]=0;
+			}
+			break;
+		}
+	}
+	for(int i=0;i<22;i++){
+    	if(a[0][i]==-1){
+    		for(int j=i;j<22;j++){
+    			a[0][j]=0;
+			}
+			break;
+		}
+	}
+	for(int i=1;i<22;i++){
+        for(int j=1;j<22;j++){
+        	if(a[i][j]==-1) 
+				continue;
+        	if(a[i][j]!=-1&&a[i-1][j]!=-1&&a[i][j-1]!=-1)
+            	a[i][j]=a[i-1][j]+a[i][j-1];
+            if(a[i][j]!=-1&&a[i-1][j]!=-1&&a[i][j-1]==-1)
+            	a[i][j]=a[i-1][j];
+            if(a[i][j]!=-1&&a[i-1][j]==-1&&a[i][j-1]!=-1)
+            	a[i][j]=a[i][j-1];
+        }
+    }
+    cout<<a[n][m]<<endl;
+    /*
+    for(int i=0;i<22;i++){
+        for(int j=0;j<22;j++){
+            cout<<a[i][j]<<" ";
+        }
+        cout<<endl;
+    }//*/
+    return 0;
+}