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最简单的暴力解法,附代码#include<iostream>
using namespace std;
int main(){
int n;
while(cin>>n){
int i,j,k,s;
for(i=1;;i++){
for(j=1;;j++){
if(n==i*(1+i)/2-2*j){
cout<<i<<endl;
break;
}
if(i*(1+i)/2-2*j<0)
break;
}
if(n==i*(1+i)/2-2*j)
break;
}
}
return 0;
}
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