Submission #1022246

#	Time	Username	Problem	Language	Result	Execution time	Memory
1022246		amine_aroua	Wombats (IOI13_wombats)	C++17	25 / 100	20039 ms	262144 KiB

wombats

#include "wombats.h"
#include<bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx2")
using namespace std;
vector<vector<int>> h , v;
int r , c;
int xx[3] = {1 , 0 , 0};
int yy[3] = {0 , -1 , 1};
void init(int R, int C, int H[5000][200], int V[5000][200]) {
    r = R;
    c = C;
    h.assign(R , vector<int>(C));
    v = h;
    for(int i = 0 ; i < R ; i++)
    {
        for(int j = 0;  j < C - 1 ; j++)
        {
            h[i][j] = H[i][j];
        }
    }
    for(int i = 0 ; i < R-1 ; i++)
    {
        for(int j = 0;  j < C ; j++)
        {
            v[i][j] = V[i][j];
        }
    }
}
void changeH(int P, int Q, int W) {
    h[P][Q] = W;
}

void changeV(int P, int Q, int W) {
    v[P][Q] = W;
}

int escape(int V1, int V2) {
    priority_queue<pair<int ,pair<int ,int>> ,vector<pair<int ,pair<int,int>>>, greater<pair<int ,pair<int, int>>>> pq;
    pq.push({0 , {0 , V1}});
    vector<bitset<200>> vis(r);
    while(!pq.empty())
    {
        auto [d , p] = pq.top();
        auto [i , j] = p;
        pq.pop();
        vis[i][j] = 1;
        if(i == r - 1 && j == V2)
        {
            return d;
        }
        for(int k = 0 ; k < 3 ; k++)
        {
            int ni = i + xx[k] , nj = j + yy[k];
            if(ni >= 0 && nj >= 0 && ni < r && nj < c)
            {
                int cost = 0;
                if(xx[k] == 1)
                    cost = v[i][j];
                if(yy[k] == 1)
                    cost = h[i][j];
                if(yy[k] == -1)
                    cost = h[i][j - 1];
                if(!vis[ni][nj])
                {
                    pq.push({cost + d , {ni , nj}});
                }
            }
        }
    }
}

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;
      |      ^~~
wombats.cpp: In function 'int escape(int, int)':
wombats.cpp:40:117: warning: control reaches end of non-void function [-Wreturn-type]
   40 |     priority_queue<pair<int ,pair<int ,int>> ,vector<pair<int ,pair<int,int>>>, greater<pair<int ,pair<int, int>>>> pq;
      |                                                                                                                     ^~

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