Submission #471545

#	Time	Username	Problem	Language	Result	Execution time	Memory
471545		rainboy	Retro (COCI17_retro)	C11	40 / 100	97 ms	1092 KiB

retro

#include <stdio.h>

#define N	300
#define M	300

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

int main() {
	static char s[M + 1]; 
	static int dp[M][N], dq[M][N];
	int n, m, i, j, d, d_;

	scanf("%d%d", &n, &m);
	for (j = 0; j < m; j++)
		for (d = 0; d < n; d++)
			dp[j][d] = d == 0 ? 0 : -1;
	for (i = 0; i < n; i++) {
		scanf("%s", s);
		for (j = 0; j < m; j++)
			for (d = 0; d < n; d++) {
				if (s[j] == '*')
					dq[j][d] = d == 0 ? 0 : -1;
				else {
					d_ = s[j] == '.' || s[j] == 'M' ? d : (s[j] == '(' ? d + 1 : d - 1);
					dq[j][d] = -1;
					if (d_ >= 0 && d_ < n) {
						dq[j][d] = dp[j][d_];
						if (j > 0 && dp[j - 1][d_] != -1)
							dq[j][d] = max(dq[j][d], dp[j - 1][d_]);
						if (j + 1 < m && dp[j + 1][d_] != -1)
							dq[j][d] = max(dq[j][d], dp[j + 1][d_]);
					}
					if (dq[j][d] != -1 && s[j] != '.' && s[j] != 'M')
						dq[j][d]++;
				}
			}
		for (j = 0; j < m; j++)
			for (d = 0; d < n; d++)
				dp[j][d] = dq[j][d];
	}
	for (j = 0; j < m; j++)
		if (s[j] == 'M') {
			printf("%d\n", dp[j][0]);
			for (i = 0; i < dp[j][0] / 2; i++)
				printf("()");
			printf("\n");
			return 0;
		}
	return 0;
}

Compilation message (stderr)

retro.c: In function 'main':
retro.c:13:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
retro.c:18:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |   scanf("%s", s);
      |   ^~~~~~~~~~~~~~

• Subtask 1: 40 / 100