Submission #4049128


Source Code Expand

#include <stdio.h>
#include <stdlib.h>
#include <algorithm>

#define MAX_N (100000L)
#define NUM_MOD (1000000007L)

using namespace std;

int main(int argc, char *argv[]) {
  // read inputs
  long N, as[MAX_N], bs[MAX_N];
  scanf("%ld", &N);
  for (long i = 0; i < N; i++) {
    scanf("%ld", &as[i]);
  }
  for (long i = 0; i < N; i++) {
    scanf("%ld", &bs[i]);
  }
  // NOTE : modified input
  sort(as, as + N);
  sort(bs, bs + N);

  // solve
  long ia = 0, ib = 0, num = 0, ans = 1;
  while (ia < N && ib < N) {
    if (as[ia] <= bs[ib]) {
      if (num < 0) {
        ans = (ans * abs(num)) % NUM_MOD;
      }
      num++;
      ia++;
    } else {
      if (num > 0) {
        ans = (ans * abs(num)) % NUM_MOD;
      }
      num--;
      ib++;
    }
    // printf("ia = %ld, ib = %ld, num = %ld, ans = %ld\n", ia, ib, num, ans);
  }
  while (ia < N) {
    if (num < 0) {
      ans = (ans * abs(num)) % NUM_MOD;
    }
    num++;
    ia++;
    // printf("ia = %ld, ib = %ld, num = %ld, ans = %ld\n", ia, ib, num, ans);
  }
  while (ib < N) {
    if (num > 0) {
      ans = (ans * abs(num)) % NUM_MOD;
    }
    num--;
    ib++;
    // printf("ia = %ld, ib = %ld, num = %ld, ans = %ld\n", ia, ib, num, ans);
  }
  printf("%ld\n", ans);

  return 0;
}

Submission Info

Submission Time
Task A - 1D Matching
User khir
Language C++14 (GCC 5.4.1)
Score 500
Code Size 1315 Byte
Status AC
Exec Time 36 ms
Memory 1664 KB

Compile Error

./Main.cpp: In function ‘int main(int, char**)’:
./Main.cpp:13:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%ld", &N);
                   ^
./Main.cpp:15:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%ld", &as[i]);
                         ^
./Main.cpp:18:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%ld", &bs[i]);
                         ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 500 / 500
Status
AC × 2
AC × 14
Set Name Test Cases
Sample example0.txt, example1.txt
All 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, example0.txt, example1.txt
Case Name Status Exec Time Memory
000.txt AC 22 ms 1152 KB
001.txt AC 8 ms 512 KB
002.txt AC 11 ms 640 KB
003.txt AC 12 ms 768 KB
004.txt AC 32 ms 1536 KB
005.txt AC 36 ms 1664 KB
006.txt AC 36 ms 1664 KB
007.txt AC 36 ms 1664 KB
008.txt AC 36 ms 1664 KB
009.txt AC 36 ms 1664 KB
010.txt AC 36 ms 1664 KB
011.txt AC 36 ms 1664 KB
example0.txt AC 1 ms 128 KB
example1.txt AC 1 ms 128 KB