15 条题解

  • 0
    @ 2024-10-13 18:58:10
    • #include<iostream> using namespace std; int main(){ int n; cin>>n; int ans=1; int sum=0; for(int i=1;i<=n;i++) { ans*=i; sum+=ans; } cout<<sum; }
    • 0
      @ 2024-10-13 18:57:19

      #include<iostream> using namespace std; int main(){ int n; cin>>n; int ans=1; int sum=0; for(int i=1;i<=n;i++) { ans*=i; sum+=ans; } cout<<sum; }

      • 0
        @ 2024-10-13 18:09:19

        #include <stdio.h> #include <iostream> using namespace std; int main() { int n; cin>>n; int ans =1; int sum =0; for(int i = 1 ; i <= n ; i++) { ans *=i; sum += ans; } cout<< sum << endl; }

        • 0
          @ 2024-3-11 21:11:15
          #include <iostream>
          #include <stdio.h>
          #include <math.h>
          #include <iomanip>
          using namespace std;
          int m , n , ans; 
          int main()
          {
          	cin >> m >> n;
          	for( int i = m ; i <= n ; i++ )
          	{
          		if( i % 17 == 0 )
          		{
          			ans += i;
          		}
          	}
          	cout << ans;
              return 0;
          }
          
          • 0

            兄弟们,为什么ans和sum不能开long long,int就行?大佬求解 longlong代码:(错的,不要复制)

            #include <iostream>
            #include <bits/stdc++.h>
            using namespace std;
            const int N=1e7+10;
            const int INF=0x3f3f3f3f;
            int main()
            {
            int n;
            long long sum=1,ans;
            cin>>n;
            for(int i=1;i<=n;i++)
            {
            for(int j=1;j<=i;j++)
            {
            sum*=j;
            }
            ans+=sum;
            sum=1;
            }
            cout<<ans;
            }
            
            

            int代码:

            #include <iostream>
            #include <bits/stdc++.h>
            using namespace std;
            const int N=1e7+10;
            const int INF=0x3f3f3f3f;
            int main()
            {
            	int n;
            	int sum=1,ans;
            	cin>>n;
            	for(int i=1;i<=n;i++)
            	{
            		for(int j=1;j<=i;j++)
            		{
            			sum*=j;
            		}
            		ans+=sum;
            		sum=1;
            	} 
            	cout<<ans;
            }
            
            
            • 0
              @ 2023-4-12 20:03:16

              #include<iostream> using namespace std; int n,ans,jc=1; int main(){

              cin >> n;
              for(int i = 1;i <= n;i++)
              { 
               	jc = 1; 
               	for(int j = 1;j <=i;j++)
                  {
                  	jc*=j;
              	}
              	ans +=jc;
              }
              cout<<ans;
              return 0;
              

              }

              • 0
                @ 2023-4-1 12:20:41

                #include <iostream> #include <iomanip> using namespace std; int main() { int n,sum=0,m=1; cin>>n; for(int i=1; i<=n; i++)//常用i,j,k { m*=i; sum+=m; } cout<<sum; return 0; }

                • -1
                  @ 2023-4-12 20:02:19
                  using namespace std;
                  int main()
                  {
                      int n;
                      cin >> n;
                      int ans = 1;
                      int jc=0 ;
                      for (int i = 1; i <= n; i++)
                      {
                          ans *=i;
                          jc += ans;
                      }
                      cout << jc;
                  }
                  
                  
                  • -2
                    @ 2022-4-17 17:32:39
                    #include <stdio.h>
                    #include <iostream>
                    using namespace std;
                    int main()
                    {
                        int n;
                        cin >> n;
                        int ans = 1;
                        int sum = 0;
                        for (int i = 1; i <= n; i++)
                        {
                            ans *=i;
                            sum += ans;
                        }
                        cout << sum << endl;
                    }
                    
                    • -3
                      @ 2023-1-3 13:05:47
                      #include<bits/stdc++.h>
                      using namespace std;
                      int n;
                      long long jc(int n)
                      {
                      	if(n==1)return 1;
                      	long long sum=1;
                      	for(int i=2;i<=n;i++)sum*=i;
                      	sum+=jc(n-1);
                      	return sum;
                      }
                      int main()
                      {
                      	cin>>n;
                      	long long ans=jc(n);
                      	cout<<ans;
                      	return 0;
                      }
                      
                      • -5
                        @ 2022-1-8 11:54:13
                        #include <iostream>
                        #include <math.h>
                        #include <iomanip>
                        using namespace std;
                        #define LL Long Long
                        const int N=1e5+10;
                        const int INF=0x3f3f3f3f;
                        int main()
                        {
                        	int n;
                        	cin >> n;
                        	int ans = 1;
                        	int sum = 0;
                        	for(int i = 1 ; i <= n ; i++)
                        	{
                        		ans *= i;
                        		sum += ans;
                        	}
                        	cout << sum << endl;
                        }
                        
                        • -5
                          @ 2022-1-8 11:54:10
                          #include <stdio.h>
                          #include <iostream>
                          #include <math.h>
                          using namespace std;
                          int main()
                          {
                          	int n;
                          	cin>>n;
                          	int ans=1;
                          	int sum=0;
                          	for(int i=1;i<=n;i++)
                          	{
                          		ans*=i;
                          		sum+=ans;
                          	}
                          	cout<<sum;
                          }
                          
                          • -6
                            @ 2022-1-8 15:39:38

                            打表义不容辞

                            #include<iostream> 
                            using namespace std; 
                            int n[13] = {0,1,2,6,24,120,720,5040,40320,362880,3628800,39916800,479001600};
                            int k, sum;
                            int main(){
                                cin >> k;
                            	for(int i = 1; i <= k; i++){
                                    sum += n[i];
                                }
                                cout << sum;
                                return 0;
                            }
                            
                            • -8
                              @ 2022-1-8 11:56:03
                              #include <stdio.h>
                              #include <iostream>
                              using namespace std;
                              int main()
                              {
                              	int n;
                              	cin >> n;
                              	int ans = 1;
                              	int sum = 0;
                              	for(int i = 1 ; i <= n ; i++)
                              	{
                              		ans *= i;
                              		sum += ans;
                              	}
                              	cout << sum << endl;
                              }
                              
                              • -8
                                @ 2022-1-8 11:53:19
                                #include <stdio.h>
                                #include <iostream>
                                using namespace std;
                                int main()
                                {
                                    int n;
                                    cin >> n;
                                    int ans = 1;
                                    int sum = 0;
                                    for (int i = 1; i <= n; i++)
                                    {
                                        ans *=i;
                                        sum += ans;
                                    }
                                    cout << sum << endl;
                                }
                                
                                • 1

                                信息

                                ID
                                932
                                时间
                                1000ms
                                内存
                                128MiB
                                难度
                                4
                                标签
                                递交数
                                717
                                已通过
                                343
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