Submission #899501

#	Time	Username	Problem	Language	Result	Execution time	Memory
899501		cig32	Genetics (BOI18_genetics)	C++17	27 / 100	9 ms	5764 KiB

genetics

#include "bits/stdc++.h"
using namespace std;
#define int long long
#define double long double
const int MAXN = 2e5 + 10;
const int MOD = 1e9 + 7; 
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
int rnd(int x, int y) {
  int u = uniform_int_distribution<int>(x, y)(rng); return u;
}
int bm(int b, int p) {
  if(p==0) return 1 % MOD;
  int r = bm(b, p >> 1);
  if(p&1) return (((r*r) % MOD) * b) % MOD;
  return (r*r) % MOD;
}
int inv(int b) { 
  return bm(b, MOD-2);
}
int fastlog(int x) {
  return (x == 0 ? -1 : 64 - __builtin_clzll(x) - 1);
}
void printcase(int i) { cout << "Case #" << i << ": "; }
static void run_with_stack_size(void (*func)(void), size_t stsize) {
  char *stack, *send;
  stack = (char *)malloc(stsize);
  send = stack + stsize - 16;
  send = (char *)((uintptr_t)send / 16 * 16);
  asm volatile(
    "mov %%rsp, (%0)\n"
    "mov %0, %%rsp\n"
    :
    : "r"(send));
  func();
  asm volatile("mov (%0), %%rsp\n" : : "r"(send));
  free(stack);
}
void solve(int tc) {
  int n, m, k;
  cin >> n >> m >> k;
  string s[n];
  for(int i=0; i<n; i++) cin >> s[i];
  if(max(n, m) <= 100) {
    for(int i=0; i<n; i++) {
      bool ok = 1;
      for(int j=0; j<n; j++) {
        if(i == j) continue;
        int d = 0;
        for(int k=0; k<m; k++) d += (s[i][k] != s[j][k]);
        ok &= (d == k);
      }
      if(ok) {
        cout << i+1 << '\n'; return;
      }
    }
    return;
  }
  vector<int> bad, good;
  for(int i=1; i<n; i++) {
    int d = 0;
    for(int j=0; j<m; j++) {
      d += (s[i][j] != s[0][j]);
    }
    if(d != k) bad.push_back(i);
    else good.push_back(i);
  }
  if(bad.empty()) {
    cout << "1\n";
    return;
  }
  bad.push_back(0);
  for(int x: good) {
    int d = 0;
    for(int j=0; j<m; j++) {
      d += (s[bad[0]][j] != s[x][j]);
    }
    if(d != k) bad.push_back(x);
    else {
      cout << x+1 << "\n"; return;
    }
  }

}
void uwu() {
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; //cin >> t;
  for(int i=1; i<=t; i++) solve(i);
}
int32_t main() {
  #ifdef ONLINE_JUDGE
  uwu();
  #endif
  #ifndef ONLINE_JUDGE
  run_with_stack_size(uwu, 1024 * 1024 * 1024); // run with a 1 GiB stack
  #endif
}
/*
g++ B.cpp -std=c++17 -O2 -o B
./B < input.txt


*/

• Subtask 1: 27 / 27
• Subtask 2: 0 / 19
• Subtask 3: 0 / 28
• Subtask 4: 0 / 26