#include <stdio.h>
#include <string.h>
#define N 1000000
#define INF 0x3f3f3f3f
int min(int a, int b) { return a < b ? a : b; }
int main() {
static char aa[N + 1], bb[N + 1];
static int dp[5], dq[5];
int n, i, s, x, ans;
scanf("%d%s%s", &n, aa, bb);
for (i = 0; i < n; i++)
aa[i] -= '0', bb[i] -= '0';
memset(dp, 0x3f, sizeof dp), dp[4] = 0;
for (i = 0; i < n; i++) {
int a = i == 0 ? 0 : aa[i - 1], b = i == 0 ? 0 : bb[i - 1];
memset(dq, 0x3f, sizeof dq);
if ((x = dp[0]) != INF) {
dq[0] = min(dq[0], x + (b == 0 && bb[i] != 0 ? 1 : 0));
dq[3] = min(dq[3], x + (b == 0 && bb[i] != 1 ? 1 : 0) + 1);
dq[4] = min(dq[4], x + (b == 0 && bb[i] != aa[i] ? 1 : 0));
}
if ((x = dp[1]) != INF) {
dq[1] = min(dq[1], x + (b == 0 && bb[i] != 0 ? 1 : 0));
dq[2] = min(dq[2], x + (b == 0 && bb[i] != 1 ? 1 : 0));
dq[4] = min(dq[4], x + (b == 0 && bb[i] != aa[i] ? 1 : 0));
}
if ((x = dp[2]) != INF) {
dq[1] = min(dq[1], x + (b == 1 && bb[i] != 0 ? 1 : 0) + 1);
dq[2] = min(dq[2], x + (b == 1 && bb[i] != 1 ? 1 : 0));
dq[4] = min(dq[4], x + (b == 1 && bb[i] != aa[i] ? 1 : 0));
}
if ((x = dp[3]) != INF) {
dq[0] = min(dq[0], x + (b == 1 && bb[i] != 0 ? 1 : 0));
dq[3] = min(dq[3], x + (b == 1 && bb[i] != 1 ? 1 : 0));
dq[4] = min(dq[4], x + (b == 1 && bb[i] != aa[i] ? 1 : 0));
}
if ((x = dp[4]) != INF) {
dq[0] = min(dq[0], x + (b == a && bb[i] != 0 ? 1 : 0) + 1);
dq[2] = min(dq[2], x + (b == a && bb[i] != 1 ? 1 : 0) + 1);
dq[4] = min(dq[4], x + (b == a && bb[i] != aa[i] ? 1 : 0));
}
memcpy(dp, dq, sizeof dq);
}
ans = INF;
for (s = 0; s < 5; s++)
ans = min(ans, dp[s]);
printf("%d\n", ans);
return 0;
}
Compilation message
lamp.c: In function 'main':
lamp.c:14:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
14 | scanf("%d%s%s", &n, aa, bb);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
296 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
292 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
0 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
284 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
212 KB |
Output is correct |
| 19 |
Correct |
0 ms |
212 KB |
Output is correct |
| 20 |
Correct |
0 ms |
288 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
212 KB |
Output is correct |
| 23 |
Correct |
0 ms |
212 KB |
Output is correct |
| 24 |
Correct |
0 ms |
212 KB |
Output is correct |
| 25 |
Correct |
0 ms |
212 KB |
Output is correct |
| 26 |
Correct |
0 ms |
212 KB |
Output is correct |
| 27 |
Correct |
0 ms |
212 KB |
Output is correct |
| 28 |
Correct |
0 ms |
212 KB |
Output is correct |
| 29 |
Correct |
0 ms |
212 KB |
Output is correct |
| 30 |
Correct |
0 ms |
212 KB |
Output is correct |
| 31 |
Correct |
0 ms |
212 KB |
Output is correct |
| 32 |
Correct |
0 ms |
212 KB |
Output is correct |
| 33 |
Correct |
0 ms |
212 KB |
Output is correct |
| 34 |
Correct |
0 ms |
292 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
296 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
292 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
0 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
284 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
212 KB |
Output is correct |
| 19 |
Correct |
0 ms |
212 KB |
Output is correct |
| 20 |
Correct |
0 ms |
288 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
212 KB |
Output is correct |
| 23 |
Correct |
0 ms |
212 KB |
Output is correct |
| 24 |
Correct |
0 ms |
212 KB |
Output is correct |
| 25 |
Correct |
0 ms |
212 KB |
Output is correct |
| 26 |
Correct |
0 ms |
212 KB |
Output is correct |
| 27 |
Correct |
0 ms |
212 KB |
Output is correct |
| 28 |
Correct |
0 ms |
212 KB |
Output is correct |
| 29 |
Correct |
0 ms |
212 KB |
Output is correct |
| 30 |
Correct |
0 ms |
212 KB |
Output is correct |
| 31 |
Correct |
0 ms |
212 KB |
Output is correct |
| 32 |
Correct |
0 ms |
212 KB |
Output is correct |
| 33 |
Correct |
0 ms |
212 KB |
Output is correct |
| 34 |
Correct |
0 ms |
292 KB |
Output is correct |
| 35 |
Correct |
1 ms |
212 KB |
Output is correct |
| 36 |
Correct |
1 ms |
212 KB |
Output is correct |
| 37 |
Correct |
0 ms |
212 KB |
Output is correct |
| 38 |
Correct |
1 ms |
212 KB |
Output is correct |
| 39 |
Correct |
1 ms |
212 KB |
Output is correct |
| 40 |
Correct |
0 ms |
340 KB |
Output is correct |
| 41 |
Correct |
0 ms |
212 KB |
Output is correct |
| 42 |
Correct |
1 ms |
212 KB |
Output is correct |
| 43 |
Correct |
1 ms |
292 KB |
Output is correct |
| 44 |
Correct |
1 ms |
212 KB |
Output is correct |
| 45 |
Correct |
0 ms |
212 KB |
Output is correct |
| 46 |
Correct |
1 ms |
296 KB |
Output is correct |
| 47 |
Correct |
1 ms |
212 KB |
Output is correct |
| 48 |
Correct |
1 ms |
296 KB |
Output is correct |
| 49 |
Correct |
0 ms |
288 KB |
Output is correct |
| 50 |
Correct |
1 ms |
212 KB |
Output is correct |
| 51 |
Correct |
0 ms |
212 KB |
Output is correct |
| 52 |
Correct |
1 ms |
212 KB |
Output is correct |
| 53 |
Correct |
1 ms |
212 KB |
Output is correct |
| 54 |
Correct |
0 ms |
212 KB |
Output is correct |
| 55 |
Correct |
1 ms |
212 KB |
Output is correct |
| 56 |
Correct |
1 ms |
288 KB |
Output is correct |
| 57 |
Correct |
0 ms |
212 KB |
Output is correct |
| 58 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
292 KB |
Output is correct |
| 3 |
Correct |
0 ms |
292 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
34 ms |
4136 KB |
Output is correct |
| 8 |
Correct |
34 ms |
4172 KB |
Output is correct |
| 9 |
Correct |
32 ms |
4300 KB |
Output is correct |
| 10 |
Correct |
32 ms |
4180 KB |
Output is correct |
| 11 |
Correct |
33 ms |
4172 KB |
Output is correct |
| 12 |
Correct |
33 ms |
4176 KB |
Output is correct |
| 13 |
Correct |
32 ms |
4172 KB |
Output is correct |
| 14 |
Correct |
32 ms |
4092 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
296 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
292 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
0 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
284 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
212 KB |
Output is correct |
| 19 |
Correct |
0 ms |
212 KB |
Output is correct |
| 20 |
Correct |
0 ms |
288 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
212 KB |
Output is correct |
| 23 |
Correct |
0 ms |
212 KB |
Output is correct |
| 24 |
Correct |
0 ms |
212 KB |
Output is correct |
| 25 |
Correct |
0 ms |
212 KB |
Output is correct |
| 26 |
Correct |
0 ms |
212 KB |
Output is correct |
| 27 |
Correct |
0 ms |
212 KB |
Output is correct |
| 28 |
Correct |
0 ms |
212 KB |
Output is correct |
| 29 |
Correct |
0 ms |
212 KB |
Output is correct |
| 30 |
Correct |
0 ms |
212 KB |
Output is correct |
| 31 |
Correct |
0 ms |
212 KB |
Output is correct |
| 32 |
Correct |
0 ms |
212 KB |
Output is correct |
| 33 |
Correct |
0 ms |
212 KB |
Output is correct |
| 34 |
Correct |
0 ms |
292 KB |
Output is correct |
| 35 |
Correct |
1 ms |
212 KB |
Output is correct |
| 36 |
Correct |
1 ms |
212 KB |
Output is correct |
| 37 |
Correct |
0 ms |
212 KB |
Output is correct |
| 38 |
Correct |
1 ms |
212 KB |
Output is correct |
| 39 |
Correct |
1 ms |
212 KB |
Output is correct |
| 40 |
Correct |
0 ms |
340 KB |
Output is correct |
| 41 |
Correct |
0 ms |
212 KB |
Output is correct |
| 42 |
Correct |
1 ms |
212 KB |
Output is correct |
| 43 |
Correct |
1 ms |
292 KB |
Output is correct |
| 44 |
Correct |
1 ms |
212 KB |
Output is correct |
| 45 |
Correct |
0 ms |
212 KB |
Output is correct |
| 46 |
Correct |
1 ms |
296 KB |
Output is correct |
| 47 |
Correct |
1 ms |
212 KB |
Output is correct |
| 48 |
Correct |
1 ms |
296 KB |
Output is correct |
| 49 |
Correct |
0 ms |
288 KB |
Output is correct |
| 50 |
Correct |
1 ms |
212 KB |
Output is correct |
| 51 |
Correct |
0 ms |
212 KB |
Output is correct |
| 52 |
Correct |
1 ms |
212 KB |
Output is correct |
| 53 |
Correct |
1 ms |
212 KB |
Output is correct |
| 54 |
Correct |
0 ms |
212 KB |
Output is correct |
| 55 |
Correct |
1 ms |
212 KB |
Output is correct |
| 56 |
Correct |
1 ms |
288 KB |
Output is correct |
| 57 |
Correct |
0 ms |
212 KB |
Output is correct |
| 58 |
Correct |
1 ms |
212 KB |
Output is correct |
| 59 |
Correct |
0 ms |
212 KB |
Output is correct |
| 60 |
Correct |
0 ms |
292 KB |
Output is correct |
| 61 |
Correct |
0 ms |
292 KB |
Output is correct |
| 62 |
Correct |
0 ms |
212 KB |
Output is correct |
| 63 |
Correct |
1 ms |
212 KB |
Output is correct |
| 64 |
Correct |
0 ms |
212 KB |
Output is correct |
| 65 |
Correct |
34 ms |
4136 KB |
Output is correct |
| 66 |
Correct |
34 ms |
4172 KB |
Output is correct |
| 67 |
Correct |
32 ms |
4300 KB |
Output is correct |
| 68 |
Correct |
32 ms |
4180 KB |
Output is correct |
| 69 |
Correct |
33 ms |
4172 KB |
Output is correct |
| 70 |
Correct |
33 ms |
4176 KB |
Output is correct |
| 71 |
Correct |
32 ms |
4172 KB |
Output is correct |
| 72 |
Correct |
32 ms |
4092 KB |
Output is correct |
| 73 |
Correct |
36 ms |
4180 KB |
Output is correct |
| 74 |
Correct |
34 ms |
4200 KB |
Output is correct |
| 75 |
Correct |
34 ms |
4084 KB |
Output is correct |
| 76 |
Correct |
36 ms |
4088 KB |
Output is correct |
| 77 |
Correct |
32 ms |
4172 KB |
Output is correct |
| 78 |
Correct |
33 ms |
4100 KB |
Output is correct |
| 79 |
Correct |
31 ms |
4080 KB |
Output is correct |
| 80 |
Correct |
32 ms |
4176 KB |
Output is correct |
| 81 |
Correct |
32 ms |
4172 KB |
Output is correct |
| 82 |
Correct |
33 ms |
4120 KB |
Output is correct |
| 83 |
Correct |
32 ms |
4116 KB |
Output is correct |
| 84 |
Correct |
32 ms |
4092 KB |
Output is correct |
| 85 |
Correct |
32 ms |
4100 KB |
Output is correct |
| 86 |
Correct |
33 ms |
4092 KB |
Output is correct |
| 87 |
Correct |
33 ms |
4168 KB |
Output is correct |
| 88 |
Correct |
36 ms |
4076 KB |
Output is correct |
| 89 |
Correct |
32 ms |
4172 KB |
Output is correct |
| 90 |
Correct |
32 ms |
4196 KB |
Output is correct |
| 91 |
Correct |
34 ms |
4256 KB |
Output is correct |
| 92 |
Correct |
33 ms |
4088 KB |
Output is correct |
| 93 |
Correct |
33 ms |
4076 KB |
Output is correct |
| 94 |
Correct |
32 ms |
4096 KB |
Output is correct |
| 95 |
Correct |
32 ms |
4072 KB |
Output is correct |
| 96 |
Correct |
33 ms |
4236 KB |
Output is correct |
| 97 |
Correct |
36 ms |
4128 KB |
Output is correct |
| 98 |
Correct |
38 ms |
4176 KB |
Output is correct |
| 99 |
Correct |
33 ms |
4088 KB |
Output is correct |
| 100 |
Correct |
32 ms |
4096 KB |
Output is correct |
| 101 |
Correct |
32 ms |
4096 KB |
Output is correct |
| 102 |
Correct |
32 ms |
4172 KB |
Output is correct |
