oj.uz

Submission #257445

# Submission time Handle Problem Language Result Execution time Memory
257445 2020-08-04T09:24:18 Z aggu_01000101 Robots (APIO13_robots) C++14
100 / 100
 1121 ms 125236 KB 
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
using tuplis = array<int, 3>;
template<class T> using pq = priority_queue<T, vector<T>, greater<T>>;
#define overload4(_1,_2,_3,_4,name,...) name
#define rep1(n) for(int i=0;i<n;++i)
#define rep2(i,n) for(int i=0;i<n;++i)
#define rep3(i,a,b) for(int i=a;i<b;++i)
#define rep4(i,a,b,c) for(int i=a;i<b;i+=c)
#define rep(...) overload4(__VA_ARGS__,rep4,rep3,rep2,rep1)(__VA_ARGS__)
#define each(i,a) for(auto&& i : a)
#define all(a) begin(a), end(a)
template<class T, class U> bool chmin(T& a, const U& b){ if(a > b){ a = b; return 1; } return 0; }
const int dx[] = {0, 1, 0, -1};
const int dy[] = {1, 0, -1, 0};
const int INF = 0x33333333;
 
 
int n, w, h;
pii mem[500][500][4];
char s[501][501];
vector<pii> g[500][500];
int cost[10][10][500][500];
pii dfs(int x, int y, int d, int cnt = 0){
    if(x < 0) return {x + 1, y};
    if(y < 0) return {x, y + 1};
    if(x >= h) return {x - 1, y};
    if(y >= w) return {x, y - 1};
    if(s[x][y] == 'x') return {x + dx[d ^ 2], y + dy[d ^ 2]};
    if(mem[x][y][d] != pii{-1, -1}) return mem[x][y][d];
    if(cnt > 1000000) return mem[x][y][d] = {-2, -2};
    int d2 = d;
    if(s[x][y] == 'A'){
        d2 += 3;
        d2 &= 3;
    }
    else if(s[x][y] == 'C'){
        d2 += 1;
        d2 &= 3;
    }
    return mem[x][y][d] = dfs(x + dx[d2], y + dy[d2], d2, cnt + 1);
}
void dijkstra(int from, int to){
    auto c = cost[from][to];
    rep(cen, from + 1, to) rep(h) rep(j, w) chmin(c[i][j], cost[from][cen][i][j] + cost[cen][to][i][j]);
    queue<tuplis> q;
    vector<tuplis> q2;
    rep(h) rep(j, w) if(c[i][j] != INF) q2.push_back({c[i][j], i, j});
    sort(all(q2), greater<tuplis>());
    while(q.size() || q2.size()){
        bool flag = 0;
        if(!q2.size()) flag = 1;
        else if(q.size() && q.front()[0] < q2.back()[0]) flag = 1;
        auto [cost, x, y] = flag ? q.front() : q2.back();
        if(flag) q.pop();
        else q2.pop_back();
        for(auto [x2, y2] : g[x][y]) if(chmin(c[x2][y2], cost + 1)){
            q.push({c[x2][y2], x2, y2});
        }
    }
}
int main(){
    memset(mem, 0xff, sizeof(mem));
    memset(cost, 0x33, sizeof(cost));
    scanf("%d%d%d", &n, &w, &h);
    rep(h) scanf("%s", s[i]);
    rep(h) rep(j, w) rep(d, 4) dfs(i, j, d);
    rep(h) rep(j, w) rep(d, 4) if(mem[i][j][d] != pii{-2, -2} && mem[i][j][d] != pii{i, j}) g[i][j].push_back(mem[i][j][d]);
    rep(h) rep(j, w) if(isdigit(s[i][j]))cost[s[i][j] - '1'][s[i][j] - '0'][i][j] = 0;
    rep(i, 1, n + 1) rep(j, 0, n + 1 - i) dijkstra(j, j + i);
    int ans = INF;
    rep(h) rep(j, w) chmin(ans, cost[0][n][i][j]);
    if(ans == INF) ans = -1;
    printf("%d\n", ans);
}

Compilation message

robots.cpp: In function 'void dijkstra(int, int)':
robots.cpp:58:14: warning: decomposition declaration only available with -std=c++1z or -std=gnu++1z
         auto [cost, x, y] = flag ? q.front() : q2.back();
              ^
robots.cpp:61:18: warning: decomposition declaration only available with -std=c++1z or -std=gnu++1z
         for(auto [x2, y2] : g[x][y]) if(chmin(c[x2][y2], cost + 1)){
                  ^
robots.cpp: In function 'int main()':
robots.cpp:69:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d", &n, &w, &h);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
robots.cpp:70:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     rep(h) scanf("%s", s[i]);
            ~~~~~^~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 111864 KB Output is correct
2 Correct 55 ms 111792 KB Output is correct
3 Correct 56 ms 111864 KB Output is correct
4 Correct 55 ms 111868 KB Output is correct
5 Correct 54 ms 111864 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 111864 KB Output is correct
2 Correct 55 ms 111792 KB Output is correct
3 Correct 56 ms 111864 KB Output is correct
4 Correct 55 ms 111868 KB Output is correct
5 Correct 54 ms 111864 KB Output is correct
6 Correct 55 ms 111864 KB Output is correct
7 Correct 54 ms 111864 KB Output is correct
8 Correct 53 ms 111864 KB Output is correct
9 Correct 56 ms 111864 KB Output is correct
10 Correct 54 ms 111864 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 111864 KB Output is correct
2 Correct 55 ms 111792 KB Output is correct
3 Correct 56 ms 111864 KB Output is correct
4 Correct 55 ms 111868 KB Output is correct
5 Correct 54 ms 111864 KB Output is correct
6 Correct 55 ms 111864 KB Output is correct
7 Correct 54 ms 111864 KB Output is correct
8 Correct 53 ms 111864 KB Output is correct
9 Correct 56 ms 111864 KB Output is correct
10 Correct 54 ms 111864 KB Output is correct
11 Correct 160 ms 116260 KB Output is correct
12 Correct 68 ms 115576 KB Output is correct
13 Correct 80 ms 115704 KB Output is correct
14 Correct 399 ms 116852 KB Output is correct
15 Correct 119 ms 115984 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 111864 KB Output is correct
2 Correct 55 ms 111792 KB Output is correct
3 Correct 56 ms 111864 KB Output is correct
4 Correct 55 ms 111868 KB Output is correct
5 Correct 54 ms 111864 KB Output is correct
6 Correct 55 ms 111864 KB Output is correct
7 Correct 54 ms 111864 KB Output is correct
8 Correct 53 ms 111864 KB Output is correct
9 Correct 56 ms 111864 KB Output is correct
10 Correct 54 ms 111864 KB Output is correct
11 Correct 160 ms 116260 KB Output is correct
12 Correct 68 ms 115576 KB Output is correct
13 Correct 80 ms 115704 KB Output is correct
14 Correct 399 ms 116852 KB Output is correct
15 Correct 119 ms 115984 KB Output is correct
16 Correct 148 ms 124024 KB Output is correct
17 Correct 1121 ms 125236 KB Output is correct
18 Correct 208 ms 123788 KB Output is correct
19 Correct 138 ms 122152 KB Output is correct
20 Correct 715 ms 124724 KB Output is correct