Submission #147509

#	Time	Username	Problem	Language	Result	Execution time	Memory
147509		ipaljak	Ispit (COCI19_ispit)	C++14	45 / 90	259 ms	892 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define TRACE(x) cerr << #x << " " << x << endl
#define FOR(i, a, b) for (int i = (a); i < int(b); ++i)
#define REP(i, n) FOR(i, 0, n)
#define _ << " " <<

typedef long long llint;

const int MOD = 1e9 + 7;
const int MAXN = 505;

bool ok[MAXN];

int n, k;
char s[MAXN][MAXN];

int main(void) {
  scanf("%d%d", &n, &k);
  for (int i = 0; i < n; ++i) scanf("%s", s[i]);

  for (int j = 0; j < n; ++j) {
    int cnt[26]; memset(cnt, 0, sizeof cnt);
    for (int i = 0; i < n; ++i) {
      ++cnt[s[i][j] - 'a'];
      if (cnt[s[i][j] - 'a'] > 1) ok[j] = true;
    }
  }

  for (int i = 0; i < n; ++i) {
    for (int j = i + 1; j < n; ++j) {
      bool check = true;
      int lo = n - 1, hi = 0;
      for (int k = 0; k < n; ++k) {
        if (s[i][k] == s[j][k]) continue;
        if (!ok[k]) check = false;
        lo = min(lo, k); hi = max(hi, k);
      }
      if (check && hi - lo + 1 <= k) {
        printf("DA\n");
        return 0;
      }
    }
  }

  printf("NE\n");
  return 0;
}

Compilation message (stderr)

ispit.cpp: In function 'int main()':
ispit.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &n, &k);
   ~~~~~^~~~~~~~~~~~~~~~
ispit.cpp:22:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for (int i = 0; i < n; ++i) scanf("%s", s[i]);
                               ~~~~~^~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 0 / 9
• Subtask 5: 0 / 9
• Subtask 6: 9 / 9
• Subtask 7: 0 / 9
• Subtask 8: 9 / 9
• Subtask 9: 9 / 9
• Subtask 10: 0 / 9