Submission #74399930

Source Code Expand

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#include <stdio.h>
#include <inttypes.h>
int N;
int seisu[128];
uint64_t memo[128][32];
uint64_t calc(int pos, int cur) {
  uint64_t ans = 0;
  if (pos == N) return cur == seisu[pos];
  if (cur < 0 || 20 < cur) return 0;
  if (memo[pos][cur]) return ~memo[pos][cur];
  /* + */
  ans += calc(pos + 1, cur + seisu[pos]);
  /* - */
  if (pos > 1) {
    ans += calc(pos + 1, cur - seisu[pos]);
  }
  return ~(memo[pos][cur] = ~ans);
}
int main(void) {
  int i;
  if (scanf("%d", &N) != 1) return 1;
  for (i = 1; i <= N; i++) {
    if (scanf("%d", &seisu[i]) != 1) return 1;
  }
  printf("%" PRIu64 "\n", calc(1, 0));
  return 0;
}
 
 
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#include <stdio.h>
#include <inttypes.h>

int N;
int seisu[128];

uint64_t memo[128][32];

uint64_t calc(int pos, int cur) {
	uint64_t ans = 0;
	if (pos == N) return cur == seisu[pos];
	if (cur < 0 || 20 < cur) return 0;
	if (memo[pos][cur]) return ~memo[pos][cur];
	/* + */
	ans += calc(pos + 1, cur + seisu[pos]);
	/* - */
	if (pos > 1) {
		ans += calc(pos + 1, cur - seisu[pos]);
	}
	return ~(memo[pos][cur] = ~ans);
}

int main(void) {
	int i;
	if (scanf("%d", &N) != 1) return 1;
	for (i = 1; i <= N; i++) {
		if (scanf("%d", &seisu[i]) != 1) return 1;
	}
	printf("%" PRIu64 "\n", calc(1, 0));
	return 0;
}

Submission Info

Judge Result