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Submission #1035551

# Submission time Handle Problem Language Result Execution time Memory
1035551 2024-07-26T11:50:05 Z alexander707070 Intergalactic ship (IZhO19_xorsum) C++14
8 / 100
 2000 ms 7512 KB 
#include<bits/stdc++.h>
#define MAXN 1007
using namespace std;

struct query{
    int type,val;
};

const int maxa=32;
const long long mod=1e9+7;

int n,d[MAXN],q,l[MAXN],r[MAXN],x[MAXN];

long long dp[500][150][150];
long long power[100007];
long long cnt[MAXN][MAXN],ans;

vector<query> w;
int li[207][3],tim,rest;

void calcdp(){
    dp[0][0][0]=1;

    for(int pos=1;pos<=int(w.size());pos++){
        for(int s=0;s<maxa;s++){
            for(int t=0;t<maxa;t++){
                dp[pos][s][t]=dp[pos-1][s][t];

                if(w[pos-1].type==0){
                    dp[pos][s][t]+=dp[pos-1][s^w[pos-1].val][t];
                }

                if(w[pos-1].type==1){
                    dp[pos][s][t]+=dp[pos-1][s][t^w[pos-1].val];
                }

                if(w[pos-1].type==2){
                    dp[pos][s][t]+=dp[pos-1][s^w[pos-1].val][t^w[pos-1].val];
                }

                dp[pos][s][t]%=mod;
            }
        }
    }
}

bool in(int a,int l,int r){
    return a>=l and a<=r;
}

long long calc(int a,int b){
    long long res=0;

    rest=0; tim++;
    w.clear();

    for(int i=1;i<=q;i++){
        if(!in(a,l[i],r[i]) and !in(b,l[i],r[i]))rest++;

        if(in(a,l[i],r[i]) and !in(b,l[i],r[i])){
            w.push_back({0,x[i]});
            li[x[i]][0]=tim;
        }
        if(!in(a,l[i],r[i]) and in(b,l[i],r[i])){
            w.push_back({1,x[i]});
            li[x[i]][1]=tim;
        }
        if(in(a,l[i],r[i]) and in(b,l[i],r[i])){
            w.push_back({2,x[i]});
            li[x[i]][2]=tim;
        }
    }

    calcdp();

    for(long long s=0;s<maxa;s++){
        for(long long t=0;t<maxa;t++){
            res+=((s*t*cnt[a][b])%mod) * ((dp[int(w.size())][d[a]^s][d[b]^t]*power[rest])%mod);
            res%=mod;
        }
    }

    return res;
}

int main(){

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>d[i];
    }

    for(int i=1;i<=n;i++){
        for(int f=i;f<=n;f++){
            cnt[i][f]=i*(n-f+1);
            if(i!=f)cnt[i][f]*=2;
        }
    }

    cin>>q;
    for(int i=1;i<=q;i++){
        cin>>l[i]>>r[i]>>x[i];
    }

    power[0]=1;
    for(int i=1;i<=q;i++){
        power[i]=(power[i-1]*2)%mod;
    }

    for(int i=1;i<=n;i++){
        for(int f=i;f<=n;f++){
            ans+=calc(i,f);
            ans%=mod;
        }
    }

    cout<<ans<<"\n";
 
    return 0;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Incorrect 2 ms 860 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Incorrect 2 ms 860 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 37 ms 1112 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 9.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2045 ms 7512 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 1112 KB Output is correct
2 Correct 15 ms 1116 KB Output is correct
3 Correct 13 ms 1116 KB Output is correct

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 1112 KB Output is correct
2 Correct 15 ms 1116 KB Output is correct
3 Correct 13 ms 1116 KB Output is correct
4 Incorrect 16 ms 1372 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Incorrect 2 ms 860 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Incorrect 2 ms 860 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Incorrect 2 ms 860 KB Output isn't correct
4 Halted 0 ms 0 KB -