#include <stdio.h>
#define N 10
#define INF 0x3f3f3f3f
int gcd(int a, int b) {
return b == 0 ? a : gcd(b, a % b);
}
int lcm(int a, int b) {
long long c = a / gcd(a, b) * b;
return c > INF ? INF : c;
}
int solve(int n, int a, int b) {
int x, ans;
ans = 0;
for (x = b; x < n; x += b)
if (x % a == 1)
ans++;
return ans;
}
int main() {
static int kk[1 << N], aa[1 << N];
int n, a, i, b, b1, b2;
long long ans;
scanf("%d%d", &a, &n);
for (i = 0; i < n; i++)
scanf("%d", &aa[1 << i]);
ans = 0;
aa[0] = 1;
for (b = 1; b < 1 << n; b++) {
aa[b] = lcm(aa[b & -b], aa[b & b - 1]);
kk[b] = kk[b & b - 1] + 1;
}
ans = 0;
for (b1 = 1; b1 < 1 << n; b1++)
for (b2 = 1; b2 < 1 << n; b2++)
if ((b1 & b2) == 0)
ans += solve(a - 1, aa[b1], aa[b2]) * ((kk[b1] + kk[b2]) % 2 == 0 ? 1 : -1);
for (i = 0; i < n; i++)
if ((a - 1) % aa[1 << i] == 0) {
ans++;
break;
}
printf("%lld\n", ans);
return 0;
}
Compilation message
sazetak.c: In function 'main':
sazetak.c:37:36: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
37 | aa[b] = lcm(aa[b & -b], aa[b & b - 1]);
| ~~^~~
sazetak.c:38:20: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
38 | kk[b] = kk[b & b - 1] + 1;
| ~~^~~
sazetak.c:31:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
31 | scanf("%d%d", &a, &n);
| ^~~~~~~~~~~~~~~~~~~~~
sazetak.c:33:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
33 | scanf("%d", &aa[1 << i]);
| ^~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
269 ms |
256 KB |
Output is correct |
| 4 |
Correct |
106 ms |
264 KB |
Output is correct |
| 5 |
Correct |
111 ms |
260 KB |
Output is correct |
| 6 |
Execution timed out |
1087 ms |
204 KB |
Time limit exceeded |
| 7 |
Execution timed out |
1083 ms |
204 KB |
Time limit exceeded |
| 8 |
Execution timed out |
1084 ms |
204 KB |
Time limit exceeded |
| 9 |
Execution timed out |
1095 ms |
204 KB |
Time limit exceeded |
| 10 |
Execution timed out |
1081 ms |
204 KB |
Time limit exceeded |
