Submission #678393

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
678393	2023-01-05 17:52:06	Ahmed57	Bootfall (IZhO17_bootfall)	C++17	65 / 100	1084 ms	1960 KiB

bootfall

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#include <bits/stdc++.h>
using namespace std;
long long dp[500*500+1];
long long mod = int(1e9+7);
bitset<500*500+1> su;
int main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int n;
    cin>>n;
    int arr[n] , sum = 0;
    for(int i = 0;i<n;i++){
        cin>>arr[i];sum+=arr[i];
    }
    dp[0] = 1;
    for(int i = 0;i<n;i++){
        for(int j = sum;j>=arr[i];j--){
            dp[j]+=dp[j-arr[i]];
            if(dp[j]>=1e18)dp[j]%=mod;
        }
    }
    if(sum%2||(!dp[sum/2])){
        cout<<"0";
        return 0;
    }
    for(int i = (arr[0]%2?1:2);i<=sum;i+=2){su[i] = 1;}
    for(int it = 0;it<n;it++){
        for(int j = arr[it];j<=sum;j++){
            dp[j]-=dp[j-arr[it]];
            dp[j]%=mod;
 
 
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• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 21 / 21
• Subtask 6: 0 / 35