oj.uz

Submission #464423

# Submission time Handle Problem Language Result Execution time Memory
464423 2021-08-13T07:53:57 Z kilikuma XORanges (eJOI19_xoranges) C++14
100 / 100
 165 ms 9524 KB 
#include <bits/stdc++.h> 
using namespace std;
long arbreImpair[(1<<19)+42] = {0}; 
long arbrePair[(1<<19)+42] = {0}; 
long xorImpair = 0, xorPair = 0; 
void modifieImpair(int a) {
  while (a>0) {
    arbreImpair[a] = arbreImpair[a*2]^arbreImpair[a*2+1]; 
   // printf("%ld\n", arbreImpair[a]); 
    a = a/2; 
  }
}
void modifiePair(int a) {
  while (a>0) {
    arbrePair[a] = arbrePair[a*2]^arbrePair[a*2+1]; 
   // printf("%ld\n", arbrePair[a]); 
    a = a/2; 
  }
}
void interImpair(int a, int b) {
  if (a>b) return; 
  if (a==b) {
    xorImpair = xorImpair^arbreImpair[a]; 
    return; 
  }
  if ((a%2) == 1){
    xorImpair = xorImpair^arbreImpair[a]; 
    a++; 
  }
  if ((b%2) == 0) {
    xorImpair = xorImpair^arbreImpair[b];
    b--; 
  }
  interImpair(a/2, b/2);  
}
void interPair(int a, int b) {
  if (a>b) {
  //  printf("what did happen"); 
    return; 
  }
    
//  printf("%d %d\n", a, b); 
  //printf("Please tell me where this went wrong"); 
  if (a==b) {
    xorPair = xorPair^arbrePair[a]; 
    // printf("%ld\n", arbrePair[a]); 
    return; 
  }
  if ((a%2) == 1) {
    xorPair = xorPair^arbrePair[a]; 
   // printf("%ld\n", arbrePair[a]); 
    a ++; 
  }
  if ((b%2) == 0) {
    xorPair = xorPair^arbrePair[b];
   //printf("%ld\n", arbrePair[b]); 
   // ;
    b--;
  }
//  printf("OMG"); 
  interPair(a/2, b/2);  
}
int main() {
  int DEC = (1<<18); 
  int nbElements, nbRequetes; 
  scanf("%d%d",&nbElements,&nbRequetes); 
  long b; 
  int l, r; 
  int pos; long val; 
  for (int i = 0; i< nbElements;i++) {
    scanf("%ld",&b); 
    if ((i+1)%2) {
      arbreImpair[i+DEC] = b; 
      modifieImpair((i+DEC)/2); 
   //   printf("%d\n", (i+DEC)); 
    }
    else {
      arbrePair[i+DEC] = b; 
      modifiePair((i+DEC)/2); 
  //    printf("%d\n", (i+DEC)); 
    }
  }
  for (int q = 0; q < nbRequetes; q ++) {
    int idQ; scanf("%d",&idQ); 
    if (idQ == 1) {
      scanf("%d%ld", &pos, &val); 
      if (pos%2) {
        arbreImpair[pos+DEC-1] = val; 
        modifieImpair((pos+DEC-1)/2); 
      }
      else {
        arbrePair[pos+DEC-1] = val; 
        modifiePair((pos+DEC-1)/2); 
      }
    }
    else {
      scanf("%d%d",&l,&r); 
      xorImpair = 0; xorPair = 0; 
      if ((r-l)%2) {

        printf("%d\n", 0); 
      } 
      else {
        if (r%2) {
          interImpair(l+DEC-1,r+DEC-1); 
       //   printf("%ld %ld\n", l+DEC-1, r+DEC-1); 
          printf("%ld \n", xorImpair); 
        }
        else {
          interPair(l+DEC-1,r+DEC-1); 
          printf("%ld\n", xorPair); 
        }
      }
    }
  }
}

Compilation message

xoranges.cpp: In function 'int main()':
xoranges.cpp:66:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |   scanf("%d%d",&nbElements,&nbRequetes);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xoranges.cpp:71:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |     scanf("%ld",&b);
      |     ~~~~~^~~~~~~~~~
xoranges.cpp:84:19: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   84 |     int idQ; scanf("%d",&idQ);
      |              ~~~~~^~~~~~~~~~~
xoranges.cpp:86:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   86 |       scanf("%d%ld", &pos, &val);
      |       ~~~~~^~~~~~~~~~~~~~~~~~~~~
xoranges.cpp:97:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   97 |       scanf("%d%d",&l,&r);
      |       ~~~~~^~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 4 ms 588 KB Output is correct
12 Correct 6 ms 588 KB Output is correct
13 Correct 4 ms 588 KB Output is correct
14 Correct 4 ms 572 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 161 ms 9516 KB Output is correct
2 Correct 161 ms 9516 KB Output is correct
3 Correct 160 ms 9524 KB Output is correct
4 Correct 158 ms 9440 KB Output is correct
5 Correct 144 ms 9492 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 4 ms 588 KB Output is correct
12 Correct 6 ms 588 KB Output is correct
13 Correct 4 ms 588 KB Output is correct
14 Correct 4 ms 572 KB Output is correct
15 Correct 161 ms 9516 KB Output is correct
16 Correct 161 ms 9516 KB Output is correct
17 Correct 160 ms 9524 KB Output is correct
18 Correct 158 ms 9440 KB Output is correct
19 Correct 144 ms 9492 KB Output is correct
20 Correct 156 ms 8936 KB Output is correct
21 Correct 158 ms 8800 KB Output is correct
22 Correct 160 ms 8900 KB Output is correct
23 Correct 165 ms 9352 KB Output is correct
24 Correct 147 ms 9448 KB Output is correct