Problem p02269 (C++) — buggy submission, verdict: Runtime Error

#include <iostream>
#include <stdio.h>
#include <string.h>

using namespace std;

#define M 1046527
#define NIL (-1)
#define L 14

char H[M][L];

int getChar(char ch) {
  if (ch == 'A')
    return 1;
  else if (ch == 'C')
    return 2;
  else if (ch == 'G')
    return 3;
  else if (ch == 'T')
    return 4;
  else
    return 0;
}

long long getKey(
    char str
        []) { //????????§??¬????????????????????¨??????????????????????????????
  long long sum = 0, p = 1;
  int i;
  for (i = 0; i < strlen(str); i++) {
    sum += p * (getChar(str[i]));
    p *= 5;
  }
  return sum;
}

int h1(
    int key) { // h2??????????????????????????????????????¨???????????????????????????
  return key % M;
}
int h2(int key) { return 1 + (key % (M - 1)); }

int find(char str[]) {
  long long key, h;
  int i;
  key = getKey(str);
  for (i = 0;; i++) {
    h = (h1(key) + i * h2(key)) % M;
    if (strcmp(H[h], str) == 0) {
      return 1;
    } else if (strlen(H[h]) == 0) {
      return 0;
    }
  }
}

int insert(char str[]) {
  long long key, h;
  int i;
  key = getKey(str);
  for (i = 0;; i++) {
    h = (h1(key) + i * h2(key)) % M;
    if (strcmp(H[h], str) == 0) {
      return 1;
    } else if (strlen(H[h]) == 0) {
      strcpy(H[h], str);
      return 0;
    }
  }
}

int main() {
  int n, h, i;
  char str[L], com[9];

  for (i = 0; i < M; i++) {
    H[i][0] = '\\0';
  }

  scanf("%d", &n);
  for (i = 0; i < n; i++) {
    scanf("%s %s", com, str);
    if (com[0] == 'i') {
      insert(str);
    } else {
      if (find(str)) {
        printf("yes\\n");
      } else {
        printf("no\\n");
      }
    }
  }
  return 0;
}

Error: 0

Fixed submission:

#include <iostream>
#include <stdio.h>
#include <string.h>

using namespace std;

#define M 104652
#define NIL (-1)
#define L 14

char H[M][L];

int getChar(char ch) {
  if (ch == 'A')
    return 1;
  else if (ch == 'C')
    return 2;
  else if (ch == 'G')
    return 3;
  else if (ch == 'T')
    return 4;
  else
    return 0;
}

long long getKey(
    char str
        []) { //????????§??¬????????????????????¨??????????????????????????????
  long long sum = 0, p = 1;
  int i;
  for (i = 0; i < strlen(str); i++) {
    sum += p * (getChar(str[i]));
    p *= 5;
  }
  return sum;
}

int h1(
    int key) { // h2??????????????????????????????????????¨???????????????????????????
  return key % M;
}
int h2(int key) { return 1 + (key % (M - 1)); }

int find(char str[]) {
  long long key, h;
  int i;
  key = getKey(str);
  for (i = 0;; i++) {
    h = (h1(key) + i * h2(key)) % M;
    if (strcmp(H[h], str) == 0) {
      return 1;
    } else if (strlen(H[h]) == 0) {
      return 0;
    }
  }
}

int insert(char str[]) {
  long long key, h;
  int i;
  key = getKey(str);
  for (i = 0;; i++) {
    h = (h1(key) + i * h2(key)) % M;
    if (strcmp(H[h], str) == 0) {
      return 1;
    } else if (strlen(H[h]) == 0) {
      strcpy(H[h], str);
      return 0;
    }
  }
}

int main() {
  int n, h, i;
  char str[L], com[9];

  for (i = 0; i < M; i++) {
    H[i][0] = '\\0';
  }

  scanf("%d", &n);
  for (i = 0; i < n; i++) {
    scanf("%s %s", com, str);
    if (com[0] == 'i') {
      insert(str);
    } else {
      if (find(str)) {
        printf("yes\\n");
      } else {
        printf("no\\n");
      }
    }
  }
  return 0;
}