oj.uz

Submission #795813

# Submission time Handle Problem Language Result Execution time Memory
795813 2023-07-27T16:04:00 Z Godgift42 XORanges (eJOI19_xoranges) C++14
55 / 100
 1000 ms 22984 KB 
#include <bits/stdc++.h>
using namespace std;

vector<long long> st;
vector<long long> st2;

void build(vector<long long> a, long long v, long long tl, long long tr){
    if(tl==tr) st[v]=a[tl];
    else{
        long long tm=(tl+tr)/2;
        build(a,v*2,tl,tm);
        build(a,v*2+1,tm+1,tr);
        st[v]=st[v*2]^st[v*2+1];
    }
}

long long XUM(long long v, long long tl, long long tr, long long l, long long r){
    if(l>r) return 0;
    if(l==tl and r==tr) return st[v];
    long long tm=(tl+tr)/2;
    return XUM(v*2,tl,tm,l,min(r,tm))^XUM(v*2+1,tm+1,tr,max(l,tm+1),r);
}

void update(long long v, long long tl, long long tr, long long pos, long long new_val){
    if(tl==tr){
        st[v]=new_val;
    }
    else{
        long long tm=(tl+tr)/2;
        if(pos<=tm) update(v*2,tl,tm,pos,new_val);
        else update(v*2+1,tm+1,tr,pos,new_val);
        st[v]=st[v*2]^st[v*2+1];
    }
}

void build2(vector<long long> a, long long v, long long tl, long long tr){
    if(tl==tr) st2[v]=a[tl];
    else{
        long long tm=(tl+tr)/2;
        build2(a,v*2,tl,tm);
        build2(a,v*2+1,tm+1,tr);
        st2[v]=st2[v*2]^st2[v*2+1];
    }
}

long long XUM2(long long v, long long tl, long long tr, long long l, long long r){
    if(l>r) return 0;
    if(l==tl and r==tr) return st2[v];
    long long tm=(tl+tr)/2;
    return XUM2(v*2,tl,tm,l,min(r,tm))^XUM2(v*2+1,tm+1,tr,max(l,tm+1),r);
}

void update2(long long v, long long tl, long long tr, long long pos, long long new_val){
    if(tl==tr){
        st2[v]=new_val;
    }
    else{
        long long tm=(tl+tr)/2;
        if(pos<=tm) update2(v*2,tl,tm,pos,new_val);
        else update2(v*2+1,tm+1,tr,pos,new_val);
        st2[v]=st2[v*2]^st2[v*2+1];
    }
}

int main(){
    long long n,q;
    scanf("%lld%lld",&n,&q);
    vector<long long> a;
    vector<long long> a2;
    st.resize(4*((n+1)/2));
    st2.resize(4*(n/2));
    for(long long i=0;i<n;i++){
        long long x;
        scanf("%lld",&x);
        if((i&1)==0)a.push_back(x);
        else a2.push_back(x);
    }
    build(a,1,0,((n+1)/2)-1);
    build2(a2,1,0,n/2-1);
    while(q--){
        long long action;
        scanf("%lld",&action);
        if(action==1){
            long long pos,ch;
            scanf("%lld%lld",&pos,&ch);
            if((pos&1)!=0) update(1,0,(n+1)/2-1,pos/2,ch);
            else update2(1,0,n/2-1,pos/2-1,ch);
        }
        else{
            long long l,u;
            scanf("%lld%lld",&l,&u);
            if(((u-l)&1)==1) printf("%lld\n",0);
            else{
                if((l&1)==1){
                    long long xum=XUM(1,0,((n+1)/2)-1,l/2,u/2);
                    printf("%lld\n",xum);
                }
                else{
                    long long xum=XUM2(1,0,(n/2)-1,l/2-1,u/2-1);
                    printf("%lld\n",xum);
                }
            }
        }
    }
    return 0;
}

Compilation message

xoranges.cpp: In function 'int main()':
xoranges.cpp:92:41: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=]
   92 |             if(((u-l)&1)==1) printf("%lld\n",0);
      |                                      ~~~^    ~
      |                                         |    |
      |                                         |    int
      |                                         long long int
      |                                      %d
xoranges.cpp:67:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |     scanf("%lld%lld",&n,&q);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
xoranges.cpp:74:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   74 |         scanf("%lld",&x);
      |         ~~~~~^~~~~~~~~~~
xoranges.cpp:82:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |         scanf("%lld",&action);
      |         ~~~~~^~~~~~~~~~~~~~~~
xoranges.cpp:85:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   85 |             scanf("%lld%lld",&pos,&ch);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~
xoranges.cpp:91:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |             scanf("%lld%lld",&l,&u);
      |             ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 308 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 308 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 10 ms 884 KB Output is correct
12 Correct 10 ms 884 KB Output is correct
13 Correct 9 ms 864 KB Output is correct
14 Correct 10 ms 928 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1079 ms 22984 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 308 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 10 ms 884 KB Output is correct
12 Correct 10 ms 884 KB Output is correct
13 Correct 9 ms 864 KB Output is correct
14 Correct 10 ms 928 KB Output is correct
15 Execution timed out 1079 ms 22984 KB Time limit exceeded
16 Halted 0 ms 0 KB -