35 lines
518 B
C++
35 lines
518 B
C++
#include<bits/stdc++.h>
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using namespace std;
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using ll = long long;
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void solve()
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{
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int n,cubes=0;
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cin>>n;
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for(int i=1; i<=n; ++i)
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{
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cubes+=(i*i+i)/2;
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if(cubes>n)
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{
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cout<<i-1<<endl;
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break;
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}
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else if(cubes==n)
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{
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cout<<i<<endl;
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break;
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}
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}
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}
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int main()
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{
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ios_base::sync_with_stdio(false);
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cin.tie(nullptr);
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int TC = 1;
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//cin >> TC;
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//cin.ignore();
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while (TC--) solve();
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} |