oj.uz

답안 #261467

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
261467 2020-08-11T18:32:20 Z brcode 로봇 (APIO13_robots) C++14
60 / 100
 1500 ms 154232 KB 
#include <iostream>
#include <bits/stdc++.h>
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#pragma GCC optimization ("Ofast")
using namespace std;
const int MAXN = 510;
int grid[MAXN][MAXN];
int dp[MAXN][MAXN][12][12];
vector<pair<int,int>> res[2];
vector<pair<int,pair<int,int>>> v1;
int n,h,w;
int dx[6] = {0,0,1,0,-1};
int dy[6] = {0,1,0,-1,0};
pair<int,int> visited[MAXN][MAXN][5];
pair<int,int> bot[20];
bool check(int i,int j){
    if(i<=0||j<=0||i>w||j>h||grid[i][j] == 0){
        return false;
    }
    return true;
}
pair<int,int> dfs(int i,int j,int dir){
    if(visited[i][j][dir]!=make_pair(0,0)){
        
        return visited[i][j][dir];
    }
    
    if(grid[i][j]==1){
        int nexti = i+dx[dir];
        int nextj = j+dy[dir];
        
        if(check(nexti,nextj)){
            
            return visited[i][j][dir] = dfs(nexti,nextj,dir);
        }else{
            
            return make_pair(i,j);
        }
        
    }
    if(grid[i][j]==2){
        int newdir = dir;
        newdir--;
        if(newdir == 0){
            newdir = 4;
        }
        int nexti = i+dx[newdir];
        int nextj = j+dy[newdir];
        if(check(nexti,nextj)){
            return visited[i][j][dir] = dfs(nexti,nextj,newdir);
        }else{
            return make_pair(i,j);
        }
        
    }
    
    if(grid[i][j]==3){
        int newdir = dir;
        newdir++;
        if(newdir == 5){
            newdir = 1;
        }
        int nexti = i+dx[newdir];
        int nextj = j+dy[newdir];
        if(check(nexti,nextj)){
            return visited[i][j][dir] = dfs(nexti,nextj,newdir);
        }else{
            return make_pair(i,j);
        }
    }
    return make_pair(0,0);
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin>>n>>w>>h;
    swap(w,h);
    int mx = h*w;
    for(int i=1;i<=w;i++){
        for(int j=1;j<=h;j++){
            char x;
            cin>>x;
            if(x=='.'){
                grid[i][j] = 1;
                continue;
            }
            if(x=='x'){
                grid[i][j] = 0;
                continue;
            }
            if(x=='A'){
                grid[i][j] = 2;
                continue;
            }
            if(x=='C'){
                grid[i][j] = 3;
                continue;
            }
            grid[i][j] = 1;
            int y = x-'0';
            bot[y] = make_pair(i,j);
            
        }
    }
    for(int i=1;i<=w;i++){
        for(int j=1;j<=h;j++){
            for(int x=1;x<=n;x++){
                for(int y=1;y<=n;y++){
                    dp[i][j][x][y] = 1e9;
                }
            }
        }
    }
    for(int i=1;i<=n;i++){
        
                dp[bot[i].first][bot[i].second][i][i] = 0;
        //  cout<<i<<" "<<bot[i].first<<" "<<bot[i].second<<endl;
        
    }
    for(int i=1;i<=w;i++){
        for(int j=1;j<=h;j++){
            if(grid[i][j] == 0){
                continue;
            }
            if(visited[i][j][1]== make_pair(0,0)){
                dfs(i,j,1);
            }
            if(visited[i][j][2]== make_pair(0,0)){
                dfs(i,j,2);
            }
            if(visited[i][j][3]== make_pair(0,0)){
                dfs(i,j,3);
            }
            if(visited[i][j][4]== make_pair(0,0)){
                dfs(i,j,4);
            }
        }
    }
    //cout<<visited[5][5][1].first<<" "<<visited[5][5][1].second<<endl;
    for(int len=0;len<=n-1;len++){
        for(int x=1;x<=n;x++){
            int y = x+len;
            if(y>n){
                break;
            }
            
            for(int i=1;i<=w;i++){
                for(int j=1;j<=h;j++){
                    for(int z=x;z<y;z++){
                        
                        dp[i][j][x][y] = min(dp[i][j][x][y],dp[i][j][x][z]+dp[i][j][z+1][y]);
                    }
                }
            }
            
            res[0].clear();
            res[1].clear();
            v1.clear();
            //int holdmx = 0;
            for(int i=1;i<=w;i++){
                for(int j=1;j<=h;j++){
                    if(dp[i][j][x][y]!=1e9){
                        v1.push_back(make_pair(dp[i][j][x][y],make_pair(i,j)));
                        
                    }
                }
            }
            sort(v1.begin(),v1.end());
            int ptr = 0;
            for(int i=0;i<=w*h;i++){
                while(ptr<v1.size() && v1[ptr].first==i){
                    res[i&1].push_back(make_pair(v1[ptr].second.first,v1[ptr].second.second));
                    ptr++;
                    
                }
                if(ptr>=v1.size() && res[i&1].size() == 0 && res[1-(i%1)].size() == 0){
                    break;
                }
                for(auto tmp:res[i&1]){
                    int a = tmp.first;
                    int b = tmp.second;
                    for(int dir=1;dir<=4;dir++){
                        int nxti = visited[a][b][dir].first;
                        int nxtj = visited[a][b][dir].second;
                        if(nxti == a && nxtj == b){
                            continue;
                        }
                        if(nxti == 0 && nxtj == 0){
                            continue;
                        }
                        if(dp[nxti][nxtj][x][y]>i+1){
                            dp[nxti][nxtj][x][y] = i+1;
                            res[(i+1)&1].push_back(make_pair(nxti,nxtj));
                            
                        }
                    }
                }
                res[i&1].clear();
            }
           
        }
    }
    //cout<<visited[1][7][3].first<<" "<<visited[1][7][3].second<<endl;
   // cout<<dp[1][7][3][4]<<endl;
    int ans = 1e9;
    for(int i=1;i<=w;i++){
        for(int j=1;j<=h;j++){
            ans = min(ans,dp[i][j][1][n]);
        }
    }
    if(ans == 1e9){
        ans = -1;
    }
    cout<<ans<<'\n';
}

Compilation message

robots.cpp:4:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("O3")
 
robots.cpp:5:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("unroll-loops")
 
robots.cpp:6:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("Ofast")
 
robots.cpp: In function 'int main()':
robots.cpp:173:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 while(ptr<v1.size() && v1[ptr].first==i){
                       ~~~^~~~~~~~~~
robots.cpp:178:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 if(ptr>=v1.size() && res[i&1].size() == 0 && res[1-(i%1)].size() == 0){
                    ~~~^~~~~~~~~~~
robots.cpp:80:9: warning: unused variable 'mx' [-Wunused-variable]
     int mx = h*w;
         ^~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 512 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 310 ms 56192 KB Output is correct
12 Correct 40 ms 55416 KB Output is correct
13 Correct 147 ms 57652 KB Output is correct
14 Correct 576 ms 56436 KB Output is correct
15 Correct 247 ms 55864 KB Output is correct

Subtask #4
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 310 ms 56192 KB Output is correct
12 Correct 40 ms 55416 KB Output is correct
13 Correct 147 ms 57652 KB Output is correct
14 Correct 576 ms 56436 KB Output is correct
15 Correct 247 ms 55864 KB Output is correct
16 Correct 591 ms 154232 KB Output is correct
17 Execution timed out 1610 ms 152304 KB Time limit exceeded
18 Halted 0 ms 0 KB -