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Submission #486409

# Submission time Handle Problem Language Result Execution time Memory
486409 2021-11-11T15:18:43 Z rainboy Palinilap (COI16_palinilap) C
17 / 100
 1000 ms 2616 KB 
#include <stdio.h>
#include <string.h>

#define N	100000
#define A	26

long long max(long long a, long long b) { return a > b ? a : b; }

int main() {
	static long long kk[N][A], ll[N];
	static char cc[N + 1];
	int n, h, i, j, i_, j_, ij, a;
	long long k_;

	scanf("%s", cc), n = strlen(cc);
	for (ij = 0; ij <= n - 1 + n - 1; ij++)
		for (i = ij / 2, j = ij - i, i_ = j_ = -1; i >= 0 && j < n; i--, j++) {
			if (cc[i] != cc[j]) {
				if (i_ == -1)
					i_ = i, j_ = j;
				else
					break;
			}
			if (i_ == -1) {
				for (h = i; h <= j; h++)
					if (ij % 2 != 0 || h * 2 != ij)
						kk[h][cc[h] - 'a']++;
					else
						ll[h]++;
				for (h = 0; h < i; h++)
					ll[h]++;
				for (h = j + 1; h < n; h++)
					ll[h]++;
			} else
				kk[i_][cc[j_] - 'a']++, kk[j_][cc[i_] - 'a']++;
		}
	k_ = 0;
	for (i = 0; i < n; i++)
		for (a = 0; a < A; a++)
			k_ = max(k_, kk[i][a] + ll[i]);
	printf("%lld\n", k_);
	return 0;
}

Compilation message

palinilap.c: In function 'main':
palinilap.c:15:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |  scanf("%s", cc), n = strlen(cc);
      |  ^~~~~~~~~~~~~~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct

Subtask #2
0 / 37.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1078 ms 676 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 46.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1073 ms 2616 KB Time limit exceeded
2 Halted 0 ms 0 KB -