Submission #173240

#	Time	Username	Problem	Language	Result	Execution time	Memory
173240		mosiashvililuka	Intergalactic ship (IZhO19_xorsum)	C++14	9 / 100	100 ms	1272 KiB

xorsum

#include<bits/stdc++.h>
using namespace std;
long long a,b,c,d,e,f[1009],i,j,zx,xc,xr[(1<<10)][101],pas,mod=1000000007;
pair <pair <long long, long long>, long long> p[1009];
int main(){
    ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    cin>>a;
    for(i=1; i<=a; i++) cin>>f[i];
    cin>>b;
    for(i=0; i<b; i++){
        cin>>p[i].first.first>>p[i].first.second>>p[i].second;
    }
    if(b<=10){
        for(j=1; j<=a; j++) xr[0][j]=f[j];
        for(i=1; i<(1<<b); i++){
            for(zx=b-1; zx>=0; zx--){
                if((i&(1<<zx))!=0) break;
            }
            for(j=1; j<=a; j++){
                if(p[zx].first.first<=j&&j<=p[zx].first.second){
                    xr[i][j]=(xr[i-(1<<zx)][j]^p[zx].second);
                }else{
                    xr[i][j]=xr[i-(1<<zx)][j];
                }
            }
        }
        for(i=0; i<(1<<b); i++){
            for(j=1; j<=a; j++) xr[i][j]+=xr[i][j-1];
            for(zx=1; zx<=a; zx++){
                for(xc=zx-1; xc>=0; xc--){
                    pas+=(xr[i][xc]-xr[i][zx])*(xr[i][xc]-xr[i][zx]);
                    pas%=mod;
                }
            }
        }
        cout<<pas;
    }
    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 5 / 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