Submission #236180

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
236180	2020-05-31T12:53:47 Z	nicolaalexandra	Mecho (IOI09_mecho)	C++14	100 / 100	404 ms	11256 KB

mecho

#include <bits/stdc++.h>
#define DIM 810
using namespace std;

char s[DIM];
int a[DIM][DIM],b[DIM][DIM],dist[DIM][DIM],f[DIM*DIM];
deque <pair<int,int> > c,aux,d;
int di[] = {-1,1,0,0};
int dj[] = {0,0,-1,1};
int n,nr,i,j,xstart,ystart,xfin,yfin;
inline int inmat (int i, int j){
    if (i >= 1 && j >= 1 && i <= n && j <= n)
        return 1;
    return 0;
}
int verif (int val){

    /// mai intai vad cat se extind albinele dupa val secunde
    c.clear();
    memset (f,0,sizeof f);
    for (i=1;i<=n;i++)
        for (j=1;j<=n;j++){
            b[i][j] = a[i][j];
            if (a[i][j] == 1)
                c.push_back(make_pair(i,j));
        }

    for (i=1;i<=val;i++){
        aux.clear();
        for (auto it : c){
            int ic = it.first, jc = it.second;
            for (int dir=0;dir<=3;dir++){
                int iv = ic + di[dir];
                int jv = jc + dj[dir];
                if (inmat (iv,jv) && b[iv][jv] == 0){
                    aux.push_back(make_pair(iv,jv));
                    b[iv][jv] = 1;
                }}}
        c = aux;
        f[i] = 1;
    }

    if (b[xstart][ystart])
        return 0;

    /// d - lista cu toate locurile in care pot sa ajung pana la secunda asta
    memset (dist,0,sizeof dist);
    d.clear();
    d.push_back(make_pair(xstart,ystart));
    dist[xstart][ystart] = 1;

    while (!d.empty()){
        int ic = d.front().first;
        int jc = d.front().second;
        d.pop_front();

        if (dist[ic][jc] % nr == 0 && !f[dist[ic][jc] / nr + val]){
            /// inseamna ca a mai trecut un minut si trb sa avansez cu albinele
            f[dist[ic][jc] / nr + val] = 1;
            aux.clear();
            for (auto it : c){
                int i = it.first, j = it.second;
                for (int dir=0;dir<=3;dir++){
                    int iv = i + di[dir];
                    int jv = j + dj[dir];
                    if (inmat(iv,jv) && b[iv][jv] == 0){
                        aux.push_back(make_pair(iv,jv));
                        b[iv][jv] = 1;
                    }}}
            c = aux;
        }

        for (int dir=0;dir<=3;dir++){
            int iv = ic + di[dir];
            int jv = jc + dj[dir];
            if (inmat (iv,jv) && (b[iv][jv] == 0 || b[iv][jv] == 3) && !dist[iv][jv]){
                if (iv == xfin && jv == yfin) /// am reusit sa ajung
                    return 1;

                dist[iv][jv] = 1 + dist[ic][jc];
                d.push_back(make_pair(iv,jv));
            }}}

    return 0;

}


int main (){

    //ifstream cin ("date.in");
    //ofstream cout ("date.out");

    cin>>n>>nr;
    for (i=1;i<=n;i++){
        cin>>s+1;
        for (j=1;j<=n;j++){
            if (s[j] == 'T')
                a[i][j] = 2;
            if (s[j] == 'M'){
                xstart = i, ystart = j;
                //a[i][j] = 4;
            }
            if (s[j] == 'D'){
                xfin = i, yfin = j;
                a[i][j] = 3;
            }
            if (s[j] == 'H')
                a[i][j] = 1;
        }
    }
    /*for (i=1;i<=n;i++,cout<<endl)
        for (j=1;j<=n;j++)
            cout<<a[i][j]<<" ";
*/
    int st = 0, dr = n*n, sol = -1;
    while (st <= dr){
        int mid = (st+dr)>>1;
        if (verif (mid)){
            sol = mid;
            st = mid+1;
        } else dr = mid-1;
    }

    cout<<sol;

    return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:96:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         cin>>s+1;
              ~^~

Subtask #1

100.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	5504 KB	Output is correct
2	Correct	8 ms	5504 KB	Output is correct
3	Correct	7 ms	5504 KB	Output is correct
4	Correct	8 ms	5504 KB	Output is correct
5	Correct	8 ms	5504 KB	Output is correct
6	Correct	8 ms	5504 KB	Output is correct
7	Correct	380 ms	9976 KB	Output is correct
8	Correct	8 ms	5504 KB	Output is correct
9	Correct	8 ms	5504 KB	Output is correct
10	Correct	8 ms	5504 KB	Output is correct
11	Correct	7 ms	5504 KB	Output is correct
12	Correct	10 ms	5888 KB	Output is correct
13	Correct	9 ms	5760 KB	Output is correct
14	Correct	10 ms	5888 KB	Output is correct
15	Correct	9 ms	5632 KB	Output is correct
16	Correct	8 ms	5632 KB	Output is correct
17	Correct	9 ms	5632 KB	Output is correct
18	Correct	9 ms	5632 KB	Output is correct
19	Correct	9 ms	5632 KB	Output is correct
20	Correct	8 ms	5632 KB	Output is correct
21	Correct	10 ms	5632 KB	Output is correct
22	Correct	9 ms	5760 KB	Output is correct
23	Correct	10 ms	5760 KB	Output is correct
24	Correct	9 ms	5760 KB	Output is correct
25	Correct	13 ms	5760 KB	Output is correct
26	Correct	10 ms	5888 KB	Output is correct
27	Correct	10 ms	5760 KB	Output is correct
28	Correct	11 ms	5888 KB	Output is correct
29	Correct	10 ms	5888 KB	Output is correct
30	Correct	10 ms	5888 KB	Output is correct
31	Correct	11 ms	5888 KB	Output is correct
32	Correct	11 ms	6016 KB	Output is correct
33	Correct	74 ms	7672 KB	Output is correct
34	Correct	57 ms	7672 KB	Output is correct
35	Correct	63 ms	7672 KB	Output is correct
36	Correct	92 ms	7928 KB	Output is correct
37	Correct	77 ms	7928 KB	Output is correct
38	Correct	73 ms	7928 KB	Output is correct
39	Correct	111 ms	8236 KB	Output is correct
40	Correct	96 ms	8312 KB	Output is correct
41	Correct	97 ms	8312 KB	Output is correct
42	Correct	149 ms	8568 KB	Output is correct
43	Correct	117 ms	8696 KB	Output is correct
44	Correct	117 ms	8572 KB	Output is correct
45	Correct	183 ms	8952 KB	Output is correct
46	Correct	133 ms	9068 KB	Output is correct
47	Correct	135 ms	9080 KB	Output is correct
48	Correct	201 ms	9208 KB	Output is correct
49	Correct	169 ms	9320 KB	Output is correct
50	Correct	158 ms	9208 KB	Output is correct
51	Correct	248 ms	9720 KB	Output is correct
52	Correct	191 ms	9592 KB	Output is correct
53	Correct	186 ms	9592 KB	Output is correct
54	Correct	291 ms	10108 KB	Output is correct
55	Correct	237 ms	9952 KB	Output is correct
56	Correct	223 ms	9976 KB	Output is correct
57	Correct	338 ms	10232 KB	Output is correct
58	Correct	252 ms	10360 KB	Output is correct
59	Correct	261 ms	10360 KB	Output is correct
60	Correct	371 ms	10488 KB	Output is correct
61	Correct	281 ms	10488 KB	Output is correct
62	Correct	306 ms	10744 KB	Output is correct
63	Correct	358 ms	10488 KB	Output is correct
64	Correct	402 ms	10588 KB	Output is correct
65	Correct	361 ms	10488 KB	Output is correct
66	Correct	388 ms	10616 KB	Output is correct
67	Correct	367 ms	10488 KB	Output is correct
68	Correct	351 ms	10744 KB	Output is correct
69	Correct	323 ms	10744 KB	Output is correct
70	Correct	335 ms	10744 KB	Output is correct
71	Correct	356 ms	10616 KB	Output is correct
72	Correct	383 ms	10744 KB	Output is correct
73	Correct	309 ms	11128 KB	Output is correct
74	Correct	367 ms	11256 KB	Output is correct
75	Correct	391 ms	11136 KB	Output is correct
76	Correct	384 ms	11256 KB	Output is correct
77	Correct	385 ms	11132 KB	Output is correct
78	Correct	380 ms	11128 KB	Output is correct
79	Correct	387 ms	11000 KB	Output is correct
80	Correct	393 ms	11080 KB	Output is correct
81	Correct	385 ms	11132 KB	Output is correct
82	Correct	395 ms	11004 KB	Output is correct
83	Correct	393 ms	11000 KB	Output is correct
84	Correct	388 ms	11032 KB	Output is correct
85	Correct	404 ms	11000 KB	Output is correct
86	Correct	390 ms	11128 KB	Output is correct
87	Correct	392 ms	10936 KB	Output is correct
88	Correct	380 ms	11000 KB	Output is correct
89	Correct	378 ms	10872 KB	Output is correct
90	Correct	373 ms	10876 KB	Output is correct
91	Correct	380 ms	10872 KB	Output is correct
92	Correct	396 ms	10872 KB	Output is correct