Submission #344749

#	Time	Username	Problem	Language	Result	Execution time	Memory
344749		fixikmila	Bootfall (IZhO17_bootfall)	C++14	100 / 100	422 ms	5992 KiB

bootfall

#include <bits/stdc++.h>
using namespace std;
#define MOD 1000000007
typedef long long ll;
typedef pair<ll,ll>pll;
typedef long double ld;
ll bin_pow(ll a,ll b){
    if(b==0)return 1;
    if(b%2==0){
        ll t=bin_pow(a,b/2);
        return t*t%MOD;
    }
    else return a*bin_pow(a,b-1)%MOD;
}
ll dp[250001],d[250001];
int main()
{
    //freopen("stones.in","r",stdin);
    //freopen("stones.out","w",stdout);
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
    cin>>n;
    vector<ll>a(n);
    dp[0]=1;
    for(int i=0;i<n;i++){
        cin>>a[i];
        sum+=a[i];
        for(int j=sum;j>=a[i];j--)dp[j]+=dp[j-a[i]];// с конца т к к более мелким еще не успели прибавить
    }
    if(sum%2||!dp[sum/2]){
        cout<<0;
        return 0;
    }
    for(int i=0;i<n;i++){
        for(int j=a[i];j<=sum;j++)dp[j]-=dp[j-a[i]];//сначала, тк чтобы когда мы отнимали от j-того, от j-a[i]-го уже было отнято то, что было сделано с помощью а_и
        sum-=a[i];
            for(int j=0;j<=500*500;j++){
            if((sum+j)%2||!dp[(sum+j)/2])d[j]=1;
        }
        sum+=a[i];
        for(int j=sum;j>=a[i];j--)dp[j]+=dp[j-a[i]];
    }
    vector<ll>c;
    for(int i=0;i<=250000;i++){
        if(d[i])continue;
        c.push_back(i);
    }
    cout<<c.size()<<"\n";
    for(auto u : c)cout<<u<<" ";
    return 0;
}

Compilation message (stderr)

bootfall.cpp: In function 'int main()':
bootfall.cpp:22:8: warning: unused variable 't' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |        ^
bootfall.cpp:22:14: warning: unused variable 'm' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |              ^
bootfall.cpp:22:16: warning: unused variable 'k' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                ^
bootfall.cpp:22:26: warning: unused variable 'l' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                          ^
bootfall.cpp:22:30: warning: unused variable 'r' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                              ^
bootfall.cpp:22:34: warning: unused variable 'x' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                  ^
bootfall.cpp:22:38: warning: unused variable 'y' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                      ^
bootfall.cpp:22:42: warning: unused variable 'z' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                          ^
bootfall.cpp:22:46: warning: unused variable 'ans' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                              ^~~
bootfall.cpp:22:52: warning: unused variable 'mn' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                                    ^~
bootfall.cpp:22:65: warning: unused variable 'mx' [-Wunused-variable]
   22 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                                                 ^~

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 21 / 21
• Subtask 6: 35 / 35