/***Farhan132***/
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
//#pragma GCC optimization ("unroll-loops")
//#pragma GCC optimize("Ofast,fast-math")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef double dd;
typedef vector<ll> vll;
typedef pair<ll , ll> ii;
typedef vector< ii > vii;
typedef pair < pair < ll , ll > , pair < ll , ll > > cm;
typedef tuple < ll, ll, ll > tp;
#define ff first
#define ss second
#define pb push_back
#define in insert
#define f0(b) for(int i=0;i<(b);i++)
#define f00(b) for(int j=0;j<(b);j++)
#define f1(b) for(int i=1;i<=(b);i++)
#define f11(b) for(int j=1;j<=(b);j++)
#define f2(a,b) for(int i=(a);i<=(b);i++)
#define f22(a,b) for(int j=(a);j<=(b);j++)
#define sf(a) scanf("%lld",&a)
#define sff(a,b) scanf("%lld %lld", &a , &b)
#define pf(a) printf("%lld\n",a)
#define pff(a,b) printf("%lld %lld\n", a , b)
#define bug printf("**!\n")
#define mem(a , b) memset(a, b ,sizeof(a))
#define front_zero(n) __builtin_clzll(n)
#define back_zero(n) __builtin_ctzll(n)
#define total_one(n) __builtin_popcount(n)
#define clean fflush(stdout)
//const ll mod = (ll) 998244353;
const ll mod = (ll) 1e9 + 7;
const ll maxn = (ll)1e8 + 5;
const int nnn = 1048590;
const int inf = numeric_limits<int>::max()-1;
//const ll INF = numeric_limits<ll>::max()-1;
const ll INF = (ll)1e18;
ll dx[]={0,1,0,-1};
ll dy[]={1,0,-1,0};
ll dxx[]={0,1,0,-1,1,1,-1,-1};
ll dyy[]={1,0,-1,0,1,-1,1,-1};
bool USACO = 0;
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const ll N = 205;
ll x[N] , t[N];
ll ans = 0, n , L;
ll dp[N][N][N][2];
ll g(ll x, ll y, ll z, ll a){
ll res = x;
res *= N;
res += y;
res *= N;
res += z;
res *= 2;
res += a;
return res;
}
ll dist(ll x, ll y){
return min(abs(x - y), L - abs(x-y));
}
void solve(){
cin >> n >> L;
x[0] = 0, t[0] = -1;
for(ll i = 1; i <= n; i++) cin >> x[i];
for(ll i = 1; i <= n; i++) cin >> t[i];
n++;
for(ll i = 0; i < N; i++){
for(ll j = 0; j < N; j++){
for(ll k = 0; k < N; k++){
for(ll x = 0; x < N; x++) dp[i][j][k][x] = 1e18;
}
}
}
priority_queue < ii , vector < ii > , greater < ii > > p;
dp[0][0][0][0] = 0;
p.push({0, 0});
while(p.size()){
auto [time, w] = p.top(); p.pop();
ll border = w%2;
w /= 2;
ll tot = w%N;
w /= N;
ll r = w%N;
w /= N;
ll l = w;
ans = max(ans, tot);
if(border == 0){
ll L = (l - 1 + n)%n;
if(L != r){
ll dummy = tot;
if(time + dist(x[l], x[L]) <= t[L]) dummy++;
if(dp[L][r][dummy][0] > time + dist(x[l], x[L])){
dp[L][r][dummy][0] = time + dist(x[l] , x[L]);
p.push({time + dist(x[l], x[L]), g(L,r,dummy, 0)});
}
}
}else{
ll R = (r + 1)%n;
if(l != R){
ll dummy = tot;
if(time + dist(x[r], x[R]) <= t[R]) dummy++;
if(dp[l][R][dummy][1] > time + dist(x[r], x[R])){
dp[l][R][dummy][1] = time + dist(x[l], x[R]);
p.push({time + dist(x[l], x[L]), g(l,R,dummy,1)});
}
}
}
if(dp[l][r][tot][border^1] > dp[l][r][tot][border] + dist(x[l], x[r])){
dp[l][r][tot][border^1] = time + dist(x[l], x[r]);
p.push({time + dist(x[l], x[r]), g(l,r,tot,1-border)});
}
}
cout << ans << '\n';
return;
}
int main() {
#ifdef LOCAL
freopen("in", "r", stdin);
freopen("out", "w", stdout);
auto start_time = clock();
#else
ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL);
#endif
//pre();
ll T = 1, CT = 0; // cin >> T;
while(T--){
// cout << "Case #" << ++CT <<": " ;
solve();
}
#ifdef LOCAL
auto end_time = clock();
cerr<< "Execution time: "<<(end_time - start_time)*(int)1e3/CLOCKS_PER_SEC<<" ms\n";
#endif
return 0;
}
Compilation message
ho_t3.cpp: In function 'int main()':
ho_t3.cpp:163:15: warning: unused variable 'CT' [-Wunused-variable]
163 | ll T = 1, CT = 0; // cin >> T;
| ^~
ho_t3.cpp: In function 'void solve()':
ho_t3.cpp:98:54: warning: iteration 2 invokes undefined behavior [-Waggressive-loop-optimizations]
98 | for(ll x = 0; x < N; x++) dp[i][j][k][x] = 1e18;
| ~~~~~~~~~~~~~~~^~~~~~
ho_t3.cpp:98:29: note: within this loop
98 | for(ll x = 0; x < N; x++) dp[i][j][k][x] = 1e18;
| ~~^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
879 ms |
272544 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
879 ms |
272544 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
879 ms |
272544 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
879 ms |
272544 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
