oj.uz

Submission #1102870

# Submission time Handle Problem Language Result Execution time Memory
1102870 2024-10-19T05:53:12 Z salmon Mecho (IOI09_mecho) C++14
4 / 100
 47 ms 3064 KB 
#include <bits/stdc++.h>
using namespace std;

int N;
int S;
vector<pair<int,int>> trans = {{1,0}, {-1,0},{0,1},{0,-1}};
char clst[810][810];
int s1,s2;
int f1,f2;
queue<pair<int,int>> q[2];
queue<pair<int,int>> m[2];
vector<pair<int,int>> spood;
bool visited[810][810];
bool vt[810][810];
int cq,cm;

bool check(int i, int j){
    if(i < 0) return false;
    if(i >= N) return false;
    if(j < 0) return false;
    if(j >= N) return false;
    return true;
}

void spreadhoney(int it){
    while(!q[it].empty()){
        pair<int,int> ii = q[it].front();
        q[it].pop();

        int i = ii.first;
        int j = ii.second;

        if(visited[i][j]) continue;
        visited[i][j] = true;
        vt[i][j] = true;

        for(pair<int,int> ii : trans){
            int ni = ii.first + i;
            int nj = ii.second + j;

            if(!check(ni,nj)) continue;
            if(visited[ni][nj]) continue;
            q[1 - it].push({ni,nj});
        }
    }
}

int main(){
    scanf(" %d",&N);
    scanf(" %d",&S);

    for(int i = 0; i < N; i++){
        for(int j = 0; j < N; j++){
            scanf(" %c",&clst[i][j]);
        }
    }

    for(int i = 0; i < N; i++){
        for(int j = 0; j < N; j++){
            visited[i][j] = false;
            vt[i][j] = false;
        }
    }

    for(int i = 0; i < N; i++){
        for(int j = 0; j < N; j++){
            if(clst[i][j] == 'T'){
                visited[i][j] = true;
                vt[i][j] = true;
            }
            else if(clst[i][j] == 'H'){
                q[1].push({i,j});
            }
            else if(clst[i][j] == 'M'){
                s1 = i;
                s2 = j;
            }
            else if(clst[i][j] == 'D'){
                f1 = i;
                f2 = j;
                visited[i][j] = true;
            }
        }
    }

    cq = 0;
    cm = 0;

    spreadhoney(1);

    vt[s1][s2] = true;

    for(pair<int,int> ii : trans){
        int ni = s1 + ii.first;
        int nj = s2 + ii.second;

        if(!check(ni,nj)) continue;
        m[0].push({ni,nj});
    }

    bool flag;

    while(true){
        int it = cm % 2;

        bool done = false;

        for(int i = 0; i < S - 1; i++, cm++){
            it = cm % 2;

            while(!m[it].empty()){
                pair<int,int> ii = m[it].front();
                m[it].pop();

                int i = ii.first;
                int j = ii.second;

                if(i == f1 && j == f2){
                    done = true;
                    flag = true;
                    break;
                }
                if(vt[i][j]) continue;
                vt[i][j] = true;

                for(pair<int,int> ii : trans){
                    int ni = i + ii.first;
                    int nj = j + ii.second;

                    if(!check(ni,nj)) continue;
                    if(vt[ni][nj]) continue;
                    m[1 - it].push({ni,nj});
                }
            }

            if(done) break;

            if(m[1 - it].empty()){
                done = true;
                flag = false;
                break;
            }
        }

        if(done) break;

        it = cq % 2;
        spreadhoney(it);
        cq++;

        it = cm % 2;

        while(!m[it].empty()){
            pair<int,int> ii = m[it].front();
            m[it].pop();

            int i = ii.first;
            int j = ii.second;
            //printf("%d %d\n",i,j);

            if(i == f1 && j == f2){
                done = true;
                flag = true;
                break;
            }
            if(vt[i][j]) continue;
            vt[i][j] = true;

            for(pair<int,int> ii : trans){
                int ni = i + ii.first;
                int nj = j + ii.second;

                if(!check(ni,nj)) continue;
                m[1 - it].push({ni,nj});
            }
        }
        //printf("\n");

        if(done) break;

        if(m[1 - it].empty()){
            done = true;
            flag = false;
            break;
        }

        cm++;

        if(done) break;
    }

    if(!flag){
        printf("-1");
        return 0;
    }

    return 0;

    int s = 0;
    int e = 800*800;
    int m1;

    while(s != e){
        m1 = (s + e + 1)/2;

        for(int i = 0; i < N; i++){
            for(int j = 0; j < N; j++){
                visited[i][j] = false;
                vt[i][j] = false;
            }
        }

        while(!m[0].empty()) m[0].pop();
        while(!m[1].empty()) m[1].pop();
        while(!q[0].empty()) q[0].pop();
        while(!q[1].empty()) q[1].pop();

        for(int i = 0; i < N; i++){
            for(int j = 0; j < N; j++){
                if(clst[i][j] == 'T'){
                    visited[i][j] = true;
                    vt[i][j] = true;
                }
                else if(clst[i][j] == 'H'){
                    q[1].push({i,j});
                }
                else if(clst[i][j] == 'D'){
                    visited[i][j] = true;
                }
            }
        }

        cq = 0;
        cm = 0;

        spreadhoney(1);

        vt[s1][s2] = true;

        for(pair<int,int> ii : trans){
            int ni = s1 + ii.first;
            int nj = s2 + ii.second;

            if(!check(ni,nj)) continue;
            m[0].push({ni,nj});
        }

        for(int i = 0; i < m1; i++, cq++){
            int it = cq % 2;

            spreadhoney(it);
        }

        if(visited[s1][s2]){
            e = m1 - 1;
            continue;
        }

        /*for(int i = 0; i < N; i++){
            for(int j = 0; j < N; j++){
                printf("%d ",visited[i][j]);
            }
            printf("\n");
        }
        printf("\n");*/

        bool flag;

        while(true){
            int it = cm % 2;

            bool done = false;

            for(int i = 0; i < S - 1; i++, cm++){
                it = cm % 2;

                while(!m[it].empty()){
                    pair<int,int> ii = m[it].front();
                    m[it].pop();

                    int i = ii.first;
                    int j = ii.second;
                    //printf("%d %d\n",i,j);

                    if(i == f1 && j == f2){
                        done = true;
                        flag = true;
                        break;
                    }
                    if(vt[i][j]) continue;
                    vt[i][j] = true;

                    for(pair<int,int> ii : trans){
                        int ni = i + ii.first;
                        int nj = j + ii.second;

                        if(!check(ni,nj)) continue;
                        m[1 - it].push({ni,nj});
                    }
                }
                //printf("\n");

                if(done) break;

                if(m[1 - it].empty()){
                    done = true;
                    flag = false;
                    break;
                }
            }

            if(done) break;

            it = cq % 2;
            spreadhoney(it);
            cq++;

            it = cm % 2;

            while(!m[it].empty()){
                pair<int,int> ii = m[it].front();
                m[it].pop();

                int i = ii.first;
                int j = ii.second;
                //printf("%d %d\n",i,j);

                if(i == f1 && j == f2){
                    done = true;
                    flag = true;
                    break;
                }
                if(vt[i][j]) continue;
                vt[i][j] = true;

                for(pair<int,int> ii : trans){
                    int ni = i + ii.first;
                    int nj = j + ii.second;

                    if(!check(ni,nj)) continue;
                    m[1 - it].push({ni,nj});
                }
            }
            //printf("\n");

            if(done) break;

            if(m[1 - it].empty()){
                done = true;
                flag = false;
                break;
            }

            cm++;

            if(done) break;
        }

        if(flag){
            s = m1;
        }
        else{
            e = m1 - 1;
        }
    }

    printf("%d",s);
}
/*
7 3
TTTTTTT
TGGGGGT
THGGGGG
MGGGGGD
TGGTTTT
TGGGGGT
TTTTTHT
*/

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:49:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |     scanf(" %d",&N);
      |     ~~~~~^~~~~~~~~~
mecho.cpp:50:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |     scanf(" %d",&S);
      |     ~~~~~^~~~~~~~~~
mecho.cpp:54:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |             scanf(" %c",&clst[i][j]);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 336 KB Output isn't correct
2 Incorrect 1 ms 336 KB Output isn't correct
3 Incorrect 1 ms 336 KB Output isn't correct
4 Incorrect 1 ms 508 KB Output isn't correct
5 Incorrect 1 ms 348 KB Output isn't correct
6 Incorrect 1 ms 508 KB Output isn't correct
7 Incorrect 37 ms 2588 KB Output isn't correct
8 Correct 1 ms 336 KB Output is correct
9 Incorrect 1 ms 336 KB Output isn't correct
10 Incorrect 1 ms 336 KB Output isn't correct
11 Incorrect 1 ms 336 KB Output isn't correct
12 Incorrect 1 ms 592 KB Output isn't correct
13 Incorrect 1 ms 508 KB Output isn't correct
14 Correct 1 ms 592 KB Output is correct
15 Incorrect 1 ms 336 KB Output isn't correct
16 Incorrect 1 ms 508 KB Output isn't correct
17 Incorrect 1 ms 336 KB Output isn't correct
18 Incorrect 1 ms 336 KB Output isn't correct
19 Incorrect 1 ms 336 KB Output isn't correct
20 Incorrect 1 ms 336 KB Output isn't correct
21 Incorrect 1 ms 336 KB Output isn't correct
22 Incorrect 1 ms 336 KB Output isn't correct
23 Incorrect 1 ms 336 KB Output isn't correct
24 Incorrect 1 ms 336 KB Output isn't correct
25 Incorrect 1 ms 592 KB Output isn't correct
26 Incorrect 1 ms 592 KB Output isn't correct
27 Incorrect 1 ms 592 KB Output isn't correct
28 Incorrect 1 ms 592 KB Output isn't correct
29 Incorrect 1 ms 592 KB Output isn't correct
30 Incorrect 1 ms 592 KB Output isn't correct
31 Incorrect 1 ms 592 KB Output isn't correct
32 Incorrect 1 ms 592 KB Output isn't correct
33 Incorrect 5 ms 1104 KB Output isn't correct
34 Incorrect 5 ms 1116 KB Output isn't correct
35 Incorrect 6 ms 1064 KB Output isn't correct
36 Incorrect 6 ms 1476 KB Output isn't correct
37 Incorrect 6 ms 1360 KB Output isn't correct
38 Incorrect 7 ms 1360 KB Output isn't correct
39 Incorrect 7 ms 1528 KB Output isn't correct
40 Incorrect 7 ms 1360 KB Output isn't correct
41 Incorrect 9 ms 1360 KB Output isn't correct
42 Incorrect 10 ms 1616 KB Output isn't correct
43 Incorrect 9 ms 1616 KB Output isn't correct
44 Incorrect 14 ms 1616 KB Output isn't correct
45 Incorrect 10 ms 1616 KB Output isn't correct
46 Incorrect 10 ms 1616 KB Output isn't correct
47 Incorrect 19 ms 1616 KB Output isn't correct
48 Incorrect 12 ms 1636 KB Output isn't correct
49 Incorrect 12 ms 1884 KB Output isn't correct
50 Incorrect 15 ms 1788 KB Output isn't correct
51 Incorrect 14 ms 1872 KB Output isn't correct
52 Incorrect 15 ms 1872 KB Output isn't correct
53 Incorrect 17 ms 1872 KB Output isn't correct
54 Incorrect 21 ms 2076 KB Output isn't correct
55 Incorrect 16 ms 1872 KB Output isn't correct
56 Incorrect 20 ms 1872 KB Output isn't correct
57 Incorrect 18 ms 2072 KB Output isn't correct
58 Incorrect 19 ms 2056 KB Output isn't correct
59 Incorrect 22 ms 2128 KB Output isn't correct
60 Incorrect 20 ms 2132 KB Output isn't correct
61 Incorrect 21 ms 2296 KB Output isn't correct
62 Incorrect 27 ms 2176 KB Output isn't correct
63 Incorrect 42 ms 2120 KB Output isn't correct
64 Incorrect 32 ms 2128 KB Output isn't correct
65 Incorrect 42 ms 2124 KB Output isn't correct
66 Incorrect 47 ms 2120 KB Output isn't correct
67 Correct 35 ms 2128 KB Output is correct
68 Incorrect 33 ms 2344 KB Output isn't correct
69 Incorrect 27 ms 2340 KB Output isn't correct
70 Incorrect 38 ms 2384 KB Output isn't correct
71 Incorrect 35 ms 2344 KB Output isn't correct
72 Incorrect 24 ms 2300 KB Output isn't correct
73 Incorrect 40 ms 3064 KB Output isn't correct
74 Incorrect 32 ms 2712 KB Output isn't correct
75 Incorrect 36 ms 2896 KB Output isn't correct
76 Incorrect 38 ms 2908 KB Output isn't correct
77 Incorrect 38 ms 3064 KB Output isn't correct
78 Correct 37 ms 2748 KB Output is correct
79 Incorrect 32 ms 2552 KB Output isn't correct
80 Incorrect 38 ms 2640 KB Output isn't correct
81 Incorrect 38 ms 2632 KB Output isn't correct
82 Incorrect 36 ms 2640 KB Output isn't correct
83 Incorrect 38 ms 2640 KB Output isn't correct
84 Incorrect 32 ms 2384 KB Output isn't correct
85 Incorrect 35 ms 2584 KB Output isn't correct
86 Incorrect 39 ms 2640 KB Output isn't correct
87 Incorrect 36 ms 2588 KB Output isn't correct
88 Incorrect 38 ms 2640 KB Output isn't correct
89 Incorrect 34 ms 2384 KB Output isn't correct
90 Incorrect 37 ms 2640 KB Output isn't correct
91 Incorrect 35 ms 2640 KB Output isn't correct
92 Incorrect 35 ms 2636 KB Output isn't correct