> #include<iostream>
> using namespace std;
> int main(){
>     unsigned long N;
>     while(cin>>N){
> 
>     unsigned long sum=0;
>     unsigned long i;
>     for(i=1;;i++){
>         sum+=i;
>         if(sum>=N)
>             break;
>     }
>     unsigned int n;
>     if(sum==N){
>         n=i;
>     }else{
>         unsigned long x=sum-N;
>         if(x%2==0){
>             n=i;
>         }else{
>             n=i+2;
>         }
>         if(x==1){
>             n=i+1;
>         }
>     }
>         cout<<n<<endl;
>     }
>     return 0;
> }

• Re:why I always WA? (29) project 2004-10-04 16:37:37