oj.uz

Submission #557309

# Submission time Handle Problem Language Result Execution time Memory
557309 2022-05-05T06:07:34 Z krit3379 Mecho (IOI09_mecho) C++17
54 / 100
 219 ms 9152 KB 
#include<bits/stdc++.h>
using namespace std;
#define N 805
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

struct A{
    int x,y,w,cnt;
};

int dis[N][N],di[4]={1,-1,0,0},dj[4]={0,0,1,-1},ans=-1;
int n,step,sx,sy,ex,ey;
char s[N];
pair<int,int> dp[N][N];
vector<pair<int,int>> hive;
bitset<N> tree[N],vis[N];
queue<A> q;

bool sol(int mid){
    if(mid>=dis[sx][sy])return false;
    int i,j,k;
    for(i=1;i<=n;i++){
        vis[i]=0;
        for(j=1;j<=n;j++)dp[i][j]={1e9,1e9};
    }
    q.push({sx,sy,step,mid});
    while(!q.empty()){
        auto [x,y,w,cnt]=q.front();
        q.pop();
        if(vis[x][y])continue;
        vis[x][y]=true;
        for(k=0;k<4;k++){
            int xx=x+di[k],yy=y+dj[k];
            if(xx>0&&xx<=n&&yy>0&&yy<=n&&!vis[xx][yy]&&!tree[xx][yy]){
                if(w==step&&dis[xx][yy]>=cnt+1&&make_pair(cnt+1,1)<dp[xx][yy])q.push({xx,yy,1,cnt+1}),dp[xx][yy]=make_pair(cnt+1,1);
                if(w<step&&dis[xx][yy]>=cnt&&make_pair(cnt,1)<dp[xx][yy])q.push({xx,yy,w+1,cnt}),dp[xx][yy]=make_pair(cnt,w+1);
            }
        }
    }
    return vis[ex][ey];
}

int main(){
    int i,j,k,l,r,mid;
    scanf("%d %d",&n,&step);
    for(i=1;i<=n;i++){
        scanf(" %s",s+1);
        for(j=1;j<=n;j++){
            if(s[j]=='T')tree[i][j]=true;
            else if(s[j]=='M')sx=i,sy=j;
            else if(s[j]=='D')ex=i,ey=j;
            else if(s[j]=='H')hive.push_back({i,j});
            dis[i][j]=1e9;
        }
    }
    for(auto [x,y]:hive)q.push({x,y,0});
    while(!q.empty()){
        auto [x,y,w,cnt]=q.front();
        q.pop();
        if(vis[x][y])continue;
        vis[x][y]=true;
        dis[x][y]=w;
        for(k=0;k<4;k++){
            int xx=x+di[k],yy=y+dj[k];
            if(xx>0&&xx<=n&&yy>0&&yy<=n&&!vis[xx][yy]&&!tree[xx][yy]&&(xx!=ex||yy!=ey))q.push({xx,yy,w+1});
        }
    }
    l=0,r=1e9;
    while(l<=r){
        mid=(l+r)/2;
        if(sol(mid))ans=mid,l=mid+1;
        else r=mid-1;
    }
    printf("%d",ans);
    return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:45:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     scanf("%d %d",&n,&step);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
mecho.cpp:47:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         scanf(" %s",s+1);
      |         ~~~~~^~~~~~~~~~~

Subtask #1
54.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB Output isn't correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Incorrect 0 ms 340 KB Output isn't correct
4 Incorrect 0 ms 340 KB Output isn't correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 146 ms 8476 KB Output is correct
8 Incorrect 0 ms 340 KB Output isn't correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 724 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Incorrect 1 ms 468 KB Output isn't correct
16 Correct 1 ms 468 KB Output is correct
17 Incorrect 1 ms 468 KB Output isn't correct
18 Correct 1 ms 468 KB Output is correct
19 Incorrect 1 ms 468 KB Output isn't correct
20 Correct 1 ms 468 KB Output is correct
21 Incorrect 1 ms 596 KB Output isn't correct
22 Correct 0 ms 596 KB Output is correct
23 Incorrect 1 ms 596 KB Output isn't correct
24 Correct 1 ms 596 KB Output is correct
25 Incorrect 1 ms 724 KB Output isn't correct
26 Correct 1 ms 724 KB Output is correct
27 Incorrect 1 ms 724 KB Output isn't correct
28 Correct 1 ms 724 KB Output is correct
29 Incorrect 1 ms 852 KB Output isn't correct
30 Correct 1 ms 852 KB Output is correct
31 Incorrect 1 ms 852 KB Output isn't correct
32 Correct 1 ms 852 KB Output is correct
33 Incorrect 7 ms 3708 KB Output isn't correct
34 Correct 8 ms 3668 KB Output is correct
35 Correct 38 ms 3700 KB Output is correct
36 Incorrect 6 ms 4180 KB Output isn't correct
37 Correct 6 ms 4188 KB Output is correct
38 Correct 40 ms 4212 KB Output is correct
39 Incorrect 9 ms 4568 KB Output isn't correct
40 Correct 10 ms 4620 KB Output is correct
41 Correct 51 ms 4564 KB Output is correct
42 Incorrect 9 ms 5076 KB Output isn't correct
43 Correct 8 ms 5076 KB Output is correct
44 Correct 95 ms 5160 KB Output is correct
45 Incorrect 12 ms 5588 KB Output isn't correct
46 Correct 10 ms 5588 KB Output is correct
47 Correct 80 ms 5636 KB Output is correct
48 Incorrect 18 ms 6100 KB Output isn't correct
49 Correct 14 ms 6116 KB Output is correct
50 Correct 109 ms 6120 KB Output is correct
51 Incorrect 19 ms 6580 KB Output isn't correct
52 Correct 25 ms 6484 KB Output is correct
53 Correct 123 ms 6608 KB Output is correct
54 Incorrect 21 ms 6980 KB Output isn't correct
55 Correct 24 ms 7016 KB Output is correct
56 Correct 146 ms 6996 KB Output is correct
57 Incorrect 26 ms 7544 KB Output isn't correct
58 Correct 16 ms 7508 KB Output is correct
59 Correct 160 ms 7468 KB Output is correct
60 Incorrect 21 ms 8020 KB Output isn't correct
61 Correct 22 ms 7988 KB Output is correct
62 Correct 202 ms 8044 KB Output is correct
63 Correct 130 ms 8036 KB Output is correct
64 Correct 215 ms 8116 KB Output is correct
65 Correct 219 ms 8028 KB Output is correct
66 Incorrect 135 ms 8036 KB Output isn't correct
67 Correct 127 ms 8036 KB Output is correct
68 Correct 61 ms 8088 KB Output is correct
69 Correct 57 ms 8060 KB Output is correct
70 Correct 33 ms 8056 KB Output is correct
71 Correct 37 ms 8012 KB Output is correct
72 Correct 28 ms 8048 KB Output is correct
73 Correct 50 ms 9128 KB Output is correct
74 Correct 102 ms 9152 KB Output is correct
75 Correct 132 ms 9116 KB Output is correct
76 Correct 90 ms 9124 KB Output is correct
77 Correct 90 ms 8904 KB Output is correct
78 Correct 103 ms 9040 KB Output is correct
79 Correct 113 ms 9036 KB Output is correct
80 Correct 114 ms 9036 KB Output is correct
81 Correct 100 ms 9040 KB Output is correct
82 Correct 84 ms 8968 KB Output is correct
83 Correct 131 ms 8868 KB Output is correct
84 Correct 144 ms 8812 KB Output is correct
85 Correct 106 ms 8988 KB Output is correct
86 Correct 114 ms 8780 KB Output is correct
87 Correct 121 ms 8780 KB Output is correct
88 Correct 152 ms 8660 KB Output is correct
89 Correct 127 ms 8632 KB Output is correct
90 Correct 128 ms 8652 KB Output is correct
91 Correct 125 ms 8560 KB Output is correct
92 Correct 141 ms 8644 KB Output is correct