#include<bits/stdc++.h>
using namespace std;
int dp[2][4][4][4];
int main() {
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int n;
string s, t;
cin>>n>>s>>t;
for(int i=0; i<=1; ++i) {
for(int a=0; a<=3; ++a) {
for(int b=0; b<=3; ++b) {
for(int c=0; c<=3; ++c) {
dp[i][a][b][c] = n;
}
}
}
}
dp[0][0][0][0]=0;
for(int i=1; i<=n; ++i) {
int v1 = n;
for(int a=0; a<=3; ++a) {
for(int b=0; b<=3; ++b) {
for(int c=0; c<=3; ++c) {
dp[i%2][a][b][c]=n;
v1 = min(v1, dp[(i+1)%2][a][b][c]);
}
}
}
if(s[i-1]==t[i-1]) {
dp[i%2][0][0][0] = v1;
}
for(int a=1; a<=3; ++a) {
int v2 = n;
for(int j=0; j<=3; ++j) {
for(int k=0; k<=3; ++k) {
v2 = min(v2, dp[(i+1)%2][a][j][k]);
v2 = min(v2, dp[(i+1)%2][j][a][k]);
v2 = min(v2, dp[(i+1)%2][j][k][a]);
}
}
if((a==1 && t[i-1]=='0') || (a==2 && t[i-1]=='1') || (a==3 && s[i-1]!=t[i-1])) {
dp[i%2][a][0][0] = min(v1+1, v2);
}
for(int b=1; b<=3; ++b) {
if(b==a) continue;
int v3 = n;
for(int j=0; j<=3; ++j) {
v3 = min(v3, dp[(i+1)%2][a][b][j]);
v3 = min(v3, dp[(i+1)%2][j][a][b]);
}
if((a==1 && t[i-1]=='0') || (a==2 && t[i-1]=='1') || (a==3 && ((b==1 && t[i-1]=='1') || (b==2 && t[i-1]=='0')))) {
dp[i%2][a][b][0] = min(v1+2, min(v2+1, v3));
}
else {
continue;
}
for(int c=1; c<=3; ++c) {
if(c==a || c==b) continue;
int v4 = dp[(i+1)%2][a][b][c];
dp[i%2][a][b][c] = min(v1+3, min(v2+2, min(v3+1, v4)));
}
}
}
}
int ans = n;
for(int a=0; a<=3; ++a) {
for(int b=0; b<=3; ++b) {
for(int c=0; c<=3; ++c) {
ans = min(ans, dp[n%2][a][b][c]);
}
}
}
cout<<ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 ms |
384 KB |
Output is correct |
| 3 |
Correct |
4 ms |
384 KB |
Output is correct |
| 4 |
Correct |
4 ms |
384 KB |
Output is correct |
| 5 |
Correct |
4 ms |
384 KB |
Output is correct |
| 6 |
Correct |
5 ms |
384 KB |
Output is correct |
| 7 |
Correct |
5 ms |
384 KB |
Output is correct |
| 8 |
Correct |
5 ms |
384 KB |
Output is correct |
| 9 |
Correct |
5 ms |
384 KB |
Output is correct |
| 10 |
Correct |
5 ms |
384 KB |
Output is correct |
| 11 |
Correct |
4 ms |
384 KB |
Output is correct |
| 12 |
Correct |
4 ms |
384 KB |
Output is correct |
| 13 |
Correct |
5 ms |
384 KB |
Output is correct |
| 14 |
Correct |
4 ms |
436 KB |
Output is correct |
| 15 |
Correct |
5 ms |
384 KB |
Output is correct |
| 16 |
Incorrect |
4 ms |
384 KB |
Output isn't correct |
| 17 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 ms |
384 KB |
Output is correct |
| 3 |
Correct |
4 ms |
384 KB |
Output is correct |
| 4 |
Correct |
4 ms |
384 KB |
Output is correct |
| 5 |
Correct |
4 ms |
384 KB |
Output is correct |
| 6 |
Correct |
5 ms |
384 KB |
Output is correct |
| 7 |
Correct |
5 ms |
384 KB |
Output is correct |
| 8 |
Correct |
5 ms |
384 KB |
Output is correct |
| 9 |
Correct |
5 ms |
384 KB |
Output is correct |
| 10 |
Correct |
5 ms |
384 KB |
Output is correct |
| 11 |
Correct |
4 ms |
384 KB |
Output is correct |
| 12 |
Correct |
4 ms |
384 KB |
Output is correct |
| 13 |
Correct |
5 ms |
384 KB |
Output is correct |
| 14 |
Correct |
4 ms |
436 KB |
Output is correct |
| 15 |
Correct |
5 ms |
384 KB |
Output is correct |
| 16 |
Incorrect |
4 ms |
384 KB |
Output isn't correct |
| 17 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
384 KB |
Output is correct |
| 2 |
Correct |
7 ms |
384 KB |
Output is correct |
| 3 |
Correct |
4 ms |
384 KB |
Output is correct |
| 4 |
Correct |
5 ms |
384 KB |
Output is correct |
| 5 |
Correct |
5 ms |
384 KB |
Output is correct |
| 6 |
Correct |
4 ms |
384 KB |
Output is correct |
| 7 |
Correct |
237 ms |
4508 KB |
Output is correct |
| 8 |
Correct |
248 ms |
4508 KB |
Output is correct |
| 9 |
Correct |
267 ms |
4552 KB |
Output is correct |
| 10 |
Correct |
245 ms |
4508 KB |
Output is correct |
| 11 |
Correct |
257 ms |
4548 KB |
Output is correct |
| 12 |
Correct |
235 ms |
4508 KB |
Output is correct |
| 13 |
Correct |
240 ms |
4436 KB |
Output is correct |
| 14 |
Correct |
252 ms |
4436 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 ms |
384 KB |
Output is correct |
| 3 |
Correct |
4 ms |
384 KB |
Output is correct |
| 4 |
Correct |
4 ms |
384 KB |
Output is correct |
| 5 |
Correct |
4 ms |
384 KB |
Output is correct |
| 6 |
Correct |
5 ms |
384 KB |
Output is correct |
| 7 |
Correct |
5 ms |
384 KB |
Output is correct |
| 8 |
Correct |
5 ms |
384 KB |
Output is correct |
| 9 |
Correct |
5 ms |
384 KB |
Output is correct |
| 10 |
Correct |
5 ms |
384 KB |
Output is correct |
| 11 |
Correct |
4 ms |
384 KB |
Output is correct |
| 12 |
Correct |
4 ms |
384 KB |
Output is correct |
| 13 |
Correct |
5 ms |
384 KB |
Output is correct |
| 14 |
Correct |
4 ms |
436 KB |
Output is correct |
| 15 |
Correct |
5 ms |
384 KB |
Output is correct |
| 16 |
Incorrect |
4 ms |
384 KB |
Output isn't correct |
| 17 |
Halted |
0 ms |
0 KB |
- |
