Submission #254041

#	Time	Username	Problem	Language	Result	Execution time	Memory
254041		khangal	Sky Walking (IOI19_walk)	C++14	0 / 100	139 ms	114424 KiB

walk

#include<bits/stdc++.h>
using namespace std;
typedef int ll; 
typedef pair<ll,ll> pl;
typedef vector<ll> vl;
#define po pop_back
#define pb push_back
#define mk make_pair
#define lw lower_bound
#define up upper_bound
#define ff first
#define ss second
#define boost ios_base::sync_with_stdio(); cin.tie(0); cout.tie(0);
#define MOD 1000000007
#define MAX 1e18
#define MIN -1e18
#define rep(i,a,b) for(ll i=a;i<=b;i++)
#define per(i,a,b) for(ll i=b;i>=a;i--)
#define con continue
#define freopen freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);
#define PI 3.14159265358979323846264338327950288419716939937510582097494459230781640628
// typedef tree<ll , null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
// template< typename T>
// using indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
ll n,m,ans,mid,mn,mx,T,sum,h1,h2,e[1234567],b[1234567],c[1234567],d[1<<20],k,i,j,l,r,h,a[1234567],w,x,y,z;
bool used[1234567];
vector<int> v[1234567],vec,vv1,vv2;
string s1,s;
ll sz[1234567],par[1234567],tr[3234567],dist[123][123];
ll dx[4]={-1,1,0,0},dy[4]={0,0,-1,1},c1[123][123];
vector<array<ll, 3>> adj[123][123];
ll search(ll id, ll val){
    return lw(v[id].begin(), v[id].end(), val) - v[id].begin();
}
ll djikstra(ll x1, ll x2, ll y1, ll y2){
    for(ll i = 0; i < 60; i++)
        for(ll j = 0; j < 60; j++)
            dist[i][j] = MAX;
    priority_queue<array<ll, 3>> pq;
    dist[x1][x2] = 0;
    pq.push({0, x1, x2});
    while(!pq.empty()){
        array<ll, 3> arr = pq.top();
        pq.pop();
        ll u1 = arr[1], u2 = arr[2];
        if(arr[0] != dist[u1][u2])
            continue;
        if(u1 == x1 && u2 == x2)
            break;
        for(auto edge : adj[u1][u2]){
            ll P = edge[0], Q = edge[1];
            if(dist[P][Q] > dist[u1][u2] + edge[2]){
                dist[P][Q] = dist[u1][u2] + edge[2];
                pq.push({dist[P][Q], P, Q});
            }
        }
    }
    return dist[y1][y2];
}
ll min_distance(vl X, vl H,vl L,vl R,vl Y,ll s,ll g){
    n = X.size();
    m = Y.size();
    sort(X.begin(),X.end());
    for(ll i = 0; i < m; i++){
        for(ll j = L[i]; j <= R[i]; j++){
            if(H[j] >= Y[i])
                v[j].pb(Y[i]);
        }
    }
    for(ll i = 0; i < n; i++){
        v[i].pb(0);
        v[i].pb(H[i]);
        sort(v[i].begin(),v[i].end());
    }
    for(ll i = 0; i < n; i++){
        vl vec;
        for(ll j = 0; j < v[i].size() - 1; j++){
            if(v[i][j] != v[i][j + 1])
                vec.pb(v[i][j]);
        }
        if(!v[i].empty())
            vec.pb(v[i].back());
 
        v[i] = vec;
    }
    for(ll i = 0; i < n; i++){
        for(ll j = 0; j < v[i].size() - 1; j++){
            adj[i][j].pb({i, j + 1, v[i][j + 1] - v[i][j]});
            adj[i][j + 1].pb({i, j, v[i][j + 1] - v[i][j]});
        }
    }
    for(ll i = 0; i < m; i++){
        ll tmp = -1;
        for(ll j = L[i]; j <= R[i]; j++){
            if(H[j] >= Y[i]){
                if(tmp == -1){
                    tmp = j;
                    continue;
                }
                ll j1 = search(j, Y[i]) , tmp1 = search(tmp, Y[i]);
                adj[j][j1].pb({tmp, tmp1, X[j] - X[tmp]});
                adj[tmp][tmp1].pb({j, j1, X[j] - X[tmp]});
                tmp = j;
            }
        }
    }
    ll res = djikstra(s,0,g,0);
    if(res==MAX)return -1;
    else return res;
}

Compilation message (stderr)

walk.cpp: In function 'll djikstra(ll, ll, ll, ll)':
walk.cpp:15:13: warning: overflow in implicit constant conversion [-Woverflow]
 #define MAX 1e18
             ^
walk.cpp:38:26: note: in expansion of macro 'MAX'
             dist[i][j] = MAX;
                          ^~~
walk.cpp: In function 'll min_distance(vl, vl, vl, vl, vl, ll, ll)':
walk.cpp:77:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(ll j = 0; j < v[i].size() - 1; j++){
                       ~~^~~~~~~~~~~~~~~~~
walk.cpp:87:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(ll j = 0; j < v[i].size() - 1; j++){
                       ~~^~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 14
• Subtask 3: 0 / 15
• Subtask 4: 0 / 18
• Subtask 5: 0 / 43