#include <iostream> using namespace std; int main(){ int n,sum=0,f,b=0,c=0; cin>>n; for(int i=1;11;i+=0){ for(f=1;f<=i;f++){ sum+=i; b+=1; if(bn){ c++; break; } } f=1; i++; if(c==1) break; } cout<<sum; return 0; }

#include<iostream> using namespace std; int main() { int a,m=1,num=0,u=0; cin>>a; for(int i=1;i<=a;0) { num++; for(int i2=1;i2<=num and i<=a;i2++) { u+=num; i++; } } cout<<u; }

#include <iostream> using namespace std; int main(){ int n; cin >> n; int gold = 1, r = 1; int sum = 0; for(int i = 1; i <= n; i++){ sum += gold; if(r == gold){ gold++; r = 1; continue; }else{ r++; } } cout << sum; return 0; }

#include <iostream> using namespace std; int main(){ int n,a=1,d=0,m=0; cin>>n; while(d<=n){ d=d+a; if(d>n){ m=m+a*a-(d-n)a; } else {m=m+aa; a++;} } }

随便试出来的，方法可能不规范，但是能AC。

#include<bits/stdc++.h> using namespace std; int main(){ long long k,n=0; cin>>k; for(int i=1;i<=1000000;i++){ if(k<=0) break; if(k-i>=0){ k-=i; n+=ii; } else { n+=ik; k-=i; } } cout<<n; }

#include <iostream> using namespace std; int main(){ int n; cin >> n; int gold = 1, r = 1; int sum = 0; for(int i = 1; i <= n; i++){ sum += gold; if(r == gold){ gold++; r = 1; continue; }else{ r++; } } cout << sum; return 0; }

#include<bits/stdc++.h> using namespace std; int a,b,e=0; int main(){ cin>>a; for(int i=1;i<=a;i+=0){ b++; for(int j=1;j<=b&&i<=a;j++){e+=b;i++;} } cout<<e; return 0; }