Submission #905737

#	Time	Username	Problem	Language	Result	Execution time	Memory
905737		vjudge1	Intergalactic ship (IZhO19_xorsum)	C++17	0 / 100	2025 ms	2648 KiB

xorsum

#include <bits/stdc++.h>
using namespace std;
#define int long long
long double rnd(){return (long double)(rand()/RAND_MAX);}
main(){
    srand(time(NULL));
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin>>n;
    int a[n+1];
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    int q;
    cin>>q;
    int l[q+1],r[q+1],x[q+1];
    for(int i=1;i<=q;i++){
        cin>>l[i]>>r[i]>>x[i];
    }
    int to=0;
    for(int j=0;j<(1<<q);j++){
        int b[n+1];
        for(int i=1;i<=n;i++){
            b[i]=a[i];
        }
        for(int i=0;i<q;i++){
            if((j>>i)&1){
                for(int j=l[i+1];j<=r[i+1];j++){
                    b[j]^=x[i+1];
                }
            }
        }
        int ans=0;
        for(int i=1;i<=n;i++){
            int sum=0;
            for(int j=i;j<=n;j++){
                sum+=a[j];
                sum%=1000000007;
                ans+=sum*sum;
                ans%=1000000007;
            }
        }
        to+=ans;
        to%=1000000007;
    }
    cout<<to<<endl;
}

Compilation message (stderr)

xorsum.cpp:5:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    5 | main(){
      | ^~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 5
• Subtask 3: 0 / 6
• Subtask 4: 0 / 9
• Subtask 5: 0 / 8
• Subtask 6: 0 / 11
• Subtask 7: 0 / 19
• Subtask 8: 0 / 30
• Subtask 9: 0 / 8