#include <iostream>
#include <algorithm>
using namespace std;
#define rep(i, n) for (int i=0; i<n; ++i)
#define rrep(i, n) for (int i=1; i<=n; ++i)
const int maxn = 400 + 10;
const int inf = int(1e9) + 10;
int n;
char s[maxn];
int ps[maxn][3];
int dp[maxn][maxn][maxn][3];
int ma, mb, mc;
int main()
{
cin.tie(0)->sync_with_stdio(0);
cin >> n >> (s+1);
rrep(i, n) {
rep(j, 3) ps[i][j] = ps[i-1][j];
++ps[i][s[i]%4-1];
}
ma = ps[n][0];
mb = ps[n][1];
mc = ps[n][2];
rrep(S, n) {
for (int a=0; a<=S && a<=ma; ++a) {
for (int b=0; b<=S-a && b<=mb; ++b) {
int c = S-a-b; if (c>mc) continue;
int *d = dp[a][b][c]; rep(i, 3) d[i] = inf;
int df = abs(ps[S][0]-a) + abs(ps[S][1]-b) + abs(ps[S][2]-c);
int is[3] = {a, b, c};
rep(ui, 3) { if (!is[ui]) continue; --is[ui];
int *bef = dp[is[0]][is[1]][is[2]];
rep(bi, 3) if (ui != bi && bef[bi] != inf) {
d[ui] = min(d[ui], bef[bi] + df);
}
++is[ui];
}
}
}
}
int *aa = dp[ma][mb][mc];
int ans = *min_element(aa, aa+3);
if (ans == inf) ans = -1;
else ans /= 2;
cout << ans << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
460 KB |
Output is correct |
| 6 |
Correct |
1 ms |
460 KB |
Output is correct |
| 7 |
Correct |
1 ms |
460 KB |
Output is correct |
| 8 |
Correct |
1 ms |
460 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 12 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
460 KB |
Output is correct |
| 6 |
Correct |
1 ms |
460 KB |
Output is correct |
| 7 |
Correct |
1 ms |
460 KB |
Output is correct |
| 8 |
Correct |
1 ms |
460 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 12 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1228 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1228 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1228 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1228 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1216 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1228 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1228 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1224 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1228 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1228 KB |
Output is correct |
| 12 |
Correct |
1 ms |
716 KB |
Output is correct |
| 13 |
Correct |
2 ms |
972 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1100 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1220 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1228 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
460 KB |
Output is correct |
| 6 |
Correct |
1 ms |
460 KB |
Output is correct |
| 7 |
Correct |
1 ms |
460 KB |
Output is correct |
| 8 |
Correct |
1 ms |
460 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 12 |
Halted |
0 ms |
0 KB |
- |
