oj.uz

Submission #1048980

# Submission time Handle Problem Language Result Execution time Memory
1048980 2024-08-08T11:46:51 Z Nickpapadak XORanges (eJOI19_xoranges) C++14
75 / 100
 1000 ms 6128 KB 
#include<bits/stdc++.h>
using namespace std;
const unsigned int MAXN = 2e+5 + 10;
bool mp[MAXN];
int pf[MAXN], pf1[MAXN],pf2[MAXN], a[MAXN];
int N, Q;
int main(){
    scanf("%d%d",&N,&Q);
    // mp.resize(N+1, 0);
    for(int i = 1; i<=N;++i){
        scanf("%d",&a[i]);
        pf[i] = pf[i-1] ^ a[i];
        // mp[i] = 0;
    }
    pf1[1] = a[1];
    for(int i = 3; i<=N; i+=2){
        pf1[i] = pf1[i-2] ^ a[i];
    }
    for(int i = 2; i<=N; i+=2){
        pf2[i] = pf2[i-2] ^ a[i];
    }
    while(Q--){
        int s,b, type;
        scanf("%d%d%d", &type, &s, &b);
        if(type == 2){
            int ans = 0;
            // for(int i = 1; i <= b-s+1; ++i){
                // for(int j = s; j+i-1 <= b;++j){
                    // ans ^= (pf[j+i-1] ^ pf[j-1]);
                //     // changemp(j+i-1);
                //     // changemp(j+i-1);
                //     for(int k = j; k <= j+i-1; ++k) mp[k] = !mp[k];
                //     // mp[j+i-1] = !mp[j+i-1];
                //     // mp[j-1] = !mp[j-1];
                // }
            // }
            if((b-s+1) % 2 == 1){
                if(s % 2 == 1) ans = pf1[b] ^ pf1[max(s-2,0)];
                else           ans = pf2[b] ^ pf2[max(s-2,0)];
            }
            // for(int i = 1; i<=N;++i){
                // printf("[%d]", i);
            // }
            // printf("\n");
            // for(int i = 1; i<=N;++i){
                // printf(" %d ", mp[i]);
                // mp[i] = 0;
            // }
            // printf("\n");
            printf("%d\n", ans);
        // }
        }else{
            a[s] = b;
            pf1[1] = a[1];
            for(int i = 3; i<=N; i+=2){
                pf1[i] = pf1[i-2] ^ a[i];
            }
            for(int i = 2; i<=N; i+=2){
                pf2[i] = pf2[i-2] ^ a[i];
            }
        }
        //     for(int i = s; i<=N;++i){
        //         pf[i] = pf[i-1] ^ a[i];
        //     }
        // }
    }
    return 0;
}

Compilation message

xoranges.cpp: In function 'int main()':
xoranges.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     scanf("%d%d",&N,&Q);
      |     ~~~~~^~~~~~~~~~~~~~
xoranges.cpp:11:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         scanf("%d",&a[i]);
      |         ~~~~~^~~~~~~~~~~~
xoranges.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         scanf("%d%d%d", &type, &s, &b);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 7 ms 2608 KB Output is correct
12 Correct 8 ms 2652 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 2 ms 2652 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 4688 KB Output is correct
2 Correct 48 ms 4688 KB Output is correct
3 Correct 49 ms 4692 KB Output is correct
4 Correct 47 ms 4520 KB Output is correct
5 Correct 46 ms 4692 KB Output is correct

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 7 ms 2608 KB Output is correct
12 Correct 8 ms 2652 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 2 ms 2652 KB Output is correct
15 Correct 49 ms 4688 KB Output is correct
16 Correct 48 ms 4688 KB Output is correct
17 Correct 49 ms 4692 KB Output is correct
18 Correct 47 ms 4520 KB Output is correct
19 Correct 46 ms 4692 KB Output is correct
20 Execution timed out 1040 ms 6128 KB Time limit exceeded
21 Halted 0 ms 0 KB -