Submission #289038

#	Time	Username	Problem	Language	Result	Execution time	Memory
289038		egekabas	Wombats (IOI13_wombats)	C++14	39 / 100	20095 ms	262148 KiB

wombats

#include "wombats.h"
#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ull, ull> pull;
typedef pair<int, int> pii;
typedef pair<ld, ld> pld;
int r, c;
const int sq = 50;
int h[5000][200];
int v[5000][200];
int dis[5000/sq+5][200][sq+5][200];
void dijkstra(int beg, int end, int imp, int dis[5000][200]){
    for(int i = beg; i <= end; ++i)
        for(int j = 0; j < c; ++j)
            dis[i-beg][j] = 1e9+7;
    priority_queue<pair<int, pii>, vector<pair<int, pii>>, greater<pair<int, pii>>> pq;
    dis[end-beg][imp] = 0;
    pq.push({0, {end, imp}});

    while(pq.size()){
        int d = pq.top().ff;
        int x = pq.top().ss.ff;
        int y = pq.top().ss.ss;
        pq.pop();
        if(d > dis[x-beg][y])
            continue;
        if(x > beg && dis[x-1-beg][y] > d + v[x-1][y]){
            dis[x-1-beg][y] = d + v[x-1][y];
            pq.push({dis[x-1-beg][y], {x-1, y}});
        }
        if(y > 0 && dis[x-beg][y-1] > d + h[x][y-1]){
            dis[x-beg][y-1] = d + h[x][y-1];
            pq.push({dis[x-beg][y-1], {x, y-1}});
        }
        if(y < c-1 && dis[x-beg][y+1] > d + h[x][y]){
            dis[x-beg][y+1] = d + h[x][y];
            pq.push({dis[x-beg][y+1], {x, y+1}});
        }
    }
}

void init(int R, int C, int H[5000][200], int V[5000][200]) {
    r = R;
    c = C;
    for(int i = 0; i < r; ++i)
        for(int j = 0; j < c; ++j){
            h[i][j] = H[i][j];
            v[i][j] = V[i][j];
        }
    for(int i = 0; i < r; i += sq)
        for(int j = 0; j < c; ++j)
            dijkstra(i, min(i+sq, r-1), j, dis[i/sq][j]);
}

void changeH(int P, int Q, int W) {
    h[P][Q] = W;
    int gr = P/sq;
    for(int j = 0; j < c; ++j)
        dijkstra(gr*sq, min(r-1, (gr+1)*sq), j, dis[gr][j]);
    if(gr > 0 && P%sq == 0){
        --gr;
        for(int j = 0; j < c; ++j)
            dijkstra(gr*sq, min(r-1, (gr+1)*sq), j, dis[gr][j]);
    }
}

void changeV(int P, int Q, int W) {
    v[P][Q] = W;
    int gr = P/sq;
    for(int j = 0; j < c; ++j)
        dijkstra(gr*sq, min(r-1, (gr+1)*sq), j, dis[gr][j]);
}

int escape(int V1, int V2) {
    vector<int> curd(c, 1e9+7);
    vector<int> newd(c, 1e9+7);
    curd[V1] = 0;
    for(int i = 0; i < r; i += sq){
        for(int j = 0; j < c; ++j)
            for(int k = 0; k < c; ++k)
                newd[k] = min(newd[k], curd[j]+dis[i/sq][k][0][j]);
        for(int j = 0; j < c; ++j){
            curd[j] = newd[j];
            newd[j] = 1e9+7;
        }
    }
    assert(curd[V2] >= 0);
    return curd[V2];
}

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 0 / 16
• Subtask 4: 18 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 24