密度图（使用差分（错误））

2768_midupng/Readme.md

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+# 标题
+
+* 内容

2768_midupng/doc/Readme.md

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+# 

2768_midupng/main.cpp

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+//weiwancheng
+#include <iostream>
+#include<cstdio>
+using namespace std;
+int main()
+{
+    int xy,r;
+    //bool a[251][251]={0};
+    int ans[252][252]={0};
+    cin>>xy>>r;
+    for(int i=1;i<=xy;i++){
+        for(int j=1;j<=xy;j++){
+            bool u;
+            cin>>u;
+            if(u==1){
+                printf("(%d,%d):",i,j);
+                int qx=i-r,qy=j-r;
+                int hx=i+r+1,hy=j+r+1;
+                if(qx<1){
+                    qx=1;
+                }
+                if(qy<1){
+                    qy=1;
+                }
+                if(hx>xy){
+                    hx=xy+1;
+                }
+                if(hy>xy){
+                    hy=xy+1;
+                }
+                printf("%d %d %d %d ",qx,qy,hx,hy);
+                ans[qx][qy]++;
+                ans[i][hy]--;
+                ans[j][hx]--;
+                ans[hx][hy]--;
+                printf("%d %d %d %d\n",ans[qx][qy],ans[i][hy],ans[j][hx],ans[hx][hy]);
+            }
+        }
+    }
+
+    for(int i=1;i<=xy;i++){
+        for(int j=1;j<=xy;j++){
+            // ans[i][j]+=ans[i-1][j]+ans[i][j-1]-ans[i-1][j-1];
+            cout<<ans[i][j];
+            if(j!=xy){
+                cout<<" ";
+            }else{
+                cout<<endl;
+            }
+        }
+    }
+
+    for(int i=1;i<=xy;i++){
+        for(int j=1;j<=xy;j++){
+            ans[i][j]+=ans[i-1][j]+ans[i][j-1]-ans[i-1][j-1];
+            cout<<ans[i][j];
+            if(j!=xy){
+                cout<<" ";
+            }else{
+                cout<<endl;
+            }
+        }
+    }
+}

2768_midupng/test/in.txt

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+5 1
+0 1 0 1 1
+1 0 0 1 1
+1 0 0 0 0
+1 1 0 0 0
+1 0 1 1 1

2768_midupng/test/out.txt

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+## z:\Chao\src\2768_midupng\test\in.txt 
+2020/05/02 ÖÜÁù 20:11:44.84 
+(1,2):1 1 3 4 1 -1 -1 -1
+(1,4):1 3 3 6 1 -1 -1 -1
+(1,5):1 4 3 6 0 -2 -1 -2
+(2,1):1 1 4 3 2 -2 -1 -2
+(2,4):1 3 4 6 2 -1 -1 -1
+(2,5):1 4 4 6 0 -2 -1 -2
+(3,1):2 1 5 3 1 -1 -1 -2
+(4,1):3 1 6 3 1 -3 -3 -1
+(4,2):3 1 6 4 2 -2 -3 -1
+(5,1):4 1 6 3 1 -3 -4 -2
+(5,3):4 2 6 5 1 -1 -3 -1
+(5,4):4 3 6 6 -2 -1 -3 -1
+(5,5):4 4 6 6 -1 -3 -3 -2
+2 0 2 0 -1
+1 0 -2 0 0
+2 0 -1 -1 0
+1 1 -2 -1 0
+0 0 -3 -1 -1
+2 2 4 4 3
+3 3 3 3 2
+5 5 4 3 2
+6 7 4 2 1
+6 7 1 -2 -4
+
+-----------------------------------------------
+Process exited after 160 ms with return value 0
+
+## z:\Chao\src\2768_midupng\test\in2.txt 
+2020/05/02 ÖÜÁù 20:11:44.84 
+
+-----------------------------------------------
+Process exited after 70 ms with return value 0
+
+## z:\Chao\src\2768_midupng\test\in3.txt 
+2020/05/02 ÖÜÁù 20:11:44.84 
+
+-----------------------------------------------
+Process exited after 80 ms with return value 0
+