# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
364264 | super_j6 | Sailing Race (CEOI12_race) | C++14 | 3100 ms | 22796 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<int, int>
#define f first
#define s second
const int mxn = 1000;
int n, m;
int dp[mxn][mxn][2], dp2[mxn][mxn][2], f[mxn][mxn][2];
vector<int> g[mxn], gr[mxn];
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cin >> n >> m;
for(int i = 0, x; i < n; i++)
for(cin >> x; x; cin >> x)
for(int j = 0; j < 2; j++)
for(int l = 0; l < 2; l++){
int u = j * n + i, v = l * n + x - 1;
if(abs(u - v) < n){
g[u].push_back(v);
gr[v].push_back(u);
}
}
for(int i[2] = {0}; i[1] < 2 * n; i[1]++)
for(i[0] = i[1]; ~i[0] && i[1] - i[0] < n; i[0]--)
for(int j = 0; j < 2; j++){
int dpc = dp[i[0]][i[1]][j];
if(i[0] != i[1]) f[i[0]][i[1]][j] = max(dpc, f[i[0] + j][i[1] - !j][j]);
for(int k : gr[i[j]]) if(k != i[!j])
for(int l = 0, ii[2]; l < 2; l++) if((k > i[l]) == l && abs(k - i[!l]) < n){
ii[l] = k, ii[!l] = i[!l];
int &dpx = dp[ii[0]][ii[1]][l], &dpx2 = dp2[ii[0]][ii[1]][l];
dpx = max(dpx, dpc + 1);
if(j == l) dpx2 = max(dpx2, dp2[i[0]][i[1]][j] + 1);
}
}
int ret = 0, x = 0;
for(int i[2] = {0}; i[1] < 2 * n; i[1]++)
for(i[0] = i[1]; ~i[0] && i[1] - i[0] < n; i[0]--)
for(int j = 0; j < 2; j++){
int dpc = dp[i[0]][i[1]][j], dpc2 = dp2[i[0]][i[1]][j];
if(dpc > ret) ret = dpc, x = i[j];
if(m && (i[0] == i[1] || dpc2)){
for(int p = 0, ii[2]; p < 2; p++)
for(int k : g[i[!j]]) if(k != i[p] && (k > i[p]) == p && abs(k - i[!p]) < n)
for(int l : gr[i[j]]) if(l != i[p] && (l > i[p]) == p && abs(l - i[!p]) < n && l != k && (l > k) == j){
ii[p] = k, ii[!p] = j == p ? i[j] : l;
int c = f[ii[0] + p][ii[1] - !p][p] + dpc2 + 2;
if(c > ret) ret = c, x = l;
}
}
}
cout << ret << endl;
cout << (x % n + 1) << endl;
return 0;
}
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
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