diff --git a/2020.cpp b/2020.cpp
new file mode 100644
index 0000000..73260a3
--- /dev/null
+++ b/2020.cpp
@@ -0,0 +1,26 @@
+#include <iostream>
+#define abs(x) ((x)>0?(x):(-x))
+using namespace std;
+int main(){
+    int n;
+    while (cin >> n && n!=0){
+        int *i = new int[n]{0};
+        for(int j = 0;j<n;j++){
+            cin >> i[j];
+            for(int ii = 0; ii < j ;ii++){
+                if(abs(i[ii])<abs(i[j])){
+                    int tmp = i[j];
+                    for(int jj = 0;jj<j-ii;jj++)
+                        i[j-jj] = i[j-jj-1];
+                    i[ii] = tmp;
+                    break;
+                }
+            }
+        }
+        for(int j = 0;j<n-1;j++)
+            cout << i[j] << ' ';
+        cout << i[n-1] << endl;
+        delete[](i);
+    }
+    return  0;
+}
\ No newline at end of file
diff --git a/2021.cpp b/2021.cpp
new file mode 100644
index 0000000..eb73264
--- /dev/null
+++ b/2021.cpp
@@ -0,0 +1,19 @@
+#include <iostream>
+using namespace std;
+int main(){
+    int n;
+    while (cin >> n && n!=0){
+        int r100=0,r50=0,r10=0,r5=0,r2=0,r1=0,tmp;
+        for(;n>0;n--){
+            cin >> tmp;
+            for(;tmp>=100;tmp-=100) r100++;
+            for(;tmp>=50;tmp-=50) r50++;
+            for(;tmp>=10;tmp-=10) r10++;
+            for(;tmp>=5;tmp-=5) r5++;
+            for(;tmp>=2;tmp-=2) r2++;
+            for(;tmp>=1;tmp-=1) r1++;
+        }
+        cout << r100+r50+r10+r5+r2+r1 << endl;
+    }
+    return  0;
+}
\ No newline at end of file
diff --git a/2022.cpp b/2022.cpp
new file mode 100644
index 0000000..db7ac9b
--- /dev/null
+++ b/2022.cpp
@@ -0,0 +1,16 @@
+#include <iostream>
+#define abs(x) ((x)>0?(x):-x)
+using namespace std;
+int main(){
+    int m,n;
+    while (cin >> m >> n){
+        int max=0,maxi=0,tmp;
+        for(int i = 0;i<m*n;i++){
+            cin >> tmp;
+            if(abs(tmp)>abs(max))
+                maxi = i,max = tmp;
+        }
+        cout << maxi/n+1 << ' ' << maxi%n +1 << ' '<< max << endl;
+    }
+    return  0;
+}
\ No newline at end of file
diff --git a/2023WA.cpp b/2023WA.cpp
new file mode 100644
index 0000000..ba15a82
--- /dev/null
+++ b/2023WA.cpp
@@ -0,0 +1,31 @@
+#include <iostream>
+#include <iomanip>
+using namespace std;
+int main(){
+    int n,m;
+    while (cin >> n >> m){
+        double *c = new double[m]{0},*i = new double[n*m]{0};
+        int count=0,tmp=0;
+        for(int ii = 0;ii<n*m;ii++){
+            cin >> i[ii];
+            c[ii%m] += i[ii];
+            if((ii%m == 0 && ii !=0))
+                (cout << setiosflags(ios::fixed) << setprecision(2) << (float)tmp/m << ' '),tmp=0;
+            if(ii == n*m-1){
+                cout << setiosflags(ios::fixed) << setprecision(2) << (float)(tmp+i[ii])/m << endl;
+                for(int j = 0;j<m-1;j++)
+                    cout << (c[j] /= n) << ' ';
+                cout << (c[m-1] /= n) << endl;
+            }
+            tmp += i[ii];
+        }
+        for(int ii = 0;ii<n;ii++){
+            for(int j = 0;j<m;j++)
+                if(i[ii*m+j]<c[j])goto out;
+            count++;
+            out:;
+        }
+        cout << count << endl;
+    }
+    return  0;
+}
\ No newline at end of file