제출 #35294

#제출 시각아이디문제언어결과실행 시간메모리
35294dqhungdlBootfall (IZhO17_bootfall)C++14
65 / 100
1000 ms4820 KiB
#include <bits/stdc++.h> using namespace std; const int mod=1e9+7; int n,sum,a[505],C[250005],f[250005]; vector<int> rs; bool Special() { if(sum%2==1) return false; f[0]=1; for(int i=1;i<=n;i++) for(int j=sum;j>=a[i];j--) f[j]=(f[j]+f[j-a[i]])%mod; return (f[sum/2]>0); } void Check(int pos) { for(int i=a[pos];i<=sum;i++) f[i]=(f[i]-f[i-a[pos]]+mod)%mod; for(int i=0;i<(sum-a[pos]+1)/2;i++) if(f[i]>0) C[sum-a[pos]-2*i]++; for(int i=sum;i>=a[pos];i--) f[i]=(f[i]+f[i-a[pos]])%mod; } int main() { //freopen("TEST.INP","r",stdin); cin>>n; for(int i=1;i<=n;i++) { cin>>a[i]; sum+=a[i]; } if(Special()==false) { cout<<0; return 0; } for(int i=1;i<=n;i++) Check(i); for(int i=1;i<=sum;i++) if(C[i]==n) rs.push_back(i); cout<<rs.size()<<"\n"; for(int i=0;i<rs.size();i++) cout<<rs[i]<<' '; }

컴파일 시 표준 에러 (stderr) 메시지

bootfall.cpp: In function 'int main()':
bootfall.cpp:50:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<rs.size();i++)
                  ^
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