题目1051：数字阶梯求和

#include "iostream" #include "stdio.h" #include <vector> #include <cstring> #include <algorithm> #include <string> #include <string.h> #include <stack> #include <queue> #include <ctype.h> #include <functional> #include <math.h> using namespace std; //1051 int ans[200]; int a,n,c; int main(){     //freopen("input.txt","r",stdin);     while(cin>>a>>n){         c=0;         memset(ans,0,sizeof(ans));         int i;         for(i=0;i<n;i++){             int t=a*(n-i)+c;             ans[i]=t;             c=t/10;         }         if(c>0)             ans[i++]=c;         for(int j=i-1;j>=0;j--)             cout<<ans[j];         cout<<endl;       }     return 0; } /**************************************************************     Problem: 1051     User: cust123     Language: C++     Result: Accepted     Time:0 ms     Memory:1520 kb ****************************************************************/