oj.uz

Submission #477635

# Submission time Handle Problem Language Result Execution time Memory
477635 2021-10-02T23:10:00 Z urosk Mecho (IOI09_mecho) C++14
68 / 100
 318 ms 16144 KB 
// __builtin_popcount(x) broj bitova
// __builtin_popcountll(x) long long
#define here cerr<<"---------------------------\n"
#include "bits/stdc++.h"
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#define ld double
#define ll long long
#define ull unsigned long long
#define llinf 100000000000000000LL // 10^17
#define iinf 2000000000 // 2*10^9
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
#define endl '\n'
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define sz(a) int(a.size())
#define all(a) a.begin(),a.end()
#define rall(a) a.begin(),a.end(),greater<int>()
#define getunique(v) {sort(all(v)); v.erase(unique(all(v)), v.end());}

using namespace std;
using namespace __gnu_pbds;

typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;

void setIO(string inoutname)
{
	freopen((inoutname+".in").c_str(),"r",stdin);
    	freopen((inoutname+".out").c_str(),"w",stdout);
}
#define mod 1
ll gcd(ll a, ll b)
{
   if(b==0) return a;
   if(a==0) return b;
   if(a>=b)  return gcd(a%b,b);
   return  gcd(a,b%a);
}
ll lcm(ll a,ll b){
   return (a/gcd(a,b))*b;
}
ll add(ll a,ll b){
	a+=b;
	a+=mod;
	if(a>=mod) a%=mod;
	return a;
}
ll mul(ll a,ll b){return(a*b)%mod;}
#define maxn 805
ll n,s;
ll a[maxn][maxn];
ll dm[maxn][maxn];
ll dh[maxn][maxn];
ll conv(char c){
    if(c=='T') return 0;
    if(c=='G') return 1;
    if(c=='M') return 2;
    if(c=='D') return 3;
    if(c=='H') return 4;
}
vector<ll> dx = {0,0,-1,1};
vector<ll> dy = {1,-1,0,0};
vector<pll> hive;
ll sx,sy,ex,ey;
bool valid(ll x,ll y){return x>=1&&x<=n&&y>=1&&y<=n;}
bool moe(ll t){
    if(t*s>=dh[sx][sy]) return 0;
    for(ll i = 1;i<=n;i++) for(ll j = 1;j<=n;j++) dm[i][j] = llinf;
    dm[sx][sy] = t*s;
    queue<pll> q;
    q.push({sx,sy});
    while(!q.empty()){
        pll p = q.front();
        q.pop();
        ll x = p.fi,y = p.sc;
        if(a[x][y]==3) return 1;
        for(ll i = 0;i<4;i++){
            ll x1 = x + dx[i];
            ll y1 = y + dy[i];
            if(!valid(x1,y1)||dm[x1][y1]!=llinf||dh[x1][y1]<=dm[x][y]+1||a[x][y]==0) continue;
            dm[x1][y1] = dm[x][y]+1;
            q.push({x1,y1});
        }
    }
    return 0;
}
ll bs(){
    ll l = 0,r = n*n+1,mid,rez = 0;
    while(l<=r){
        mid = (l+r)/2;
        if(moe(mid)){
            rez = mid;
            l = mid+1;
        }else r = mid-1;
    }
    return rez;
}
void tc(){
	ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);
    cin >> n >> s;
    for(ll i = 1;i<=n;i++){
        string s1; cin >> s1;
        for(ll j = 1;j<=n;j++){
            a[i][j] = conv(s1[j-1]);
            if(a[i][j]==2){
                sx = i;
                sy = j;
            }
            if(a[i][j]==3){
                ex = i;
                ey = j;
            }
            if(a[i][j]==4){
                hive.pb({i,j});
            }
        }
    }
    for(ll i = 1;i<=n;i++) for(ll j = 1;j<=n;j++) dh[i][j] = llinf;
    queue<pll> q;
    for(pll p : hive){
        dh[p.fi][p.sc] = 0;
        q.push(p);
    }
    while(!q.empty()){
        pll p = q.front();
        q.pop();
        ll x = p.fi,y = p.sc;
        for(ll i = 0;i<4;i++){
            ll x1 = x + dx[i];
            ll y1 = y + dy[i];
            if(!valid(x1,y1)||a[x1][y1]!=1||dh[x1][y1]!=llinf) continue;
            dh[x1][y1] = dh[x][y]+s;
            q.push({x1,y1});
        }
    }
    dh[ex][ey] = llinf;
    cout<<bs()<<endl;
}
int main(){
	ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);
	//setIO("lol");
	int t; t = 1;
	while(t--){
		tc();
	}
	return 0;
}

Compilation message

mecho.cpp: In function 'void setIO(std::string)':
mecho.cpp:32:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |  freopen((inoutname+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:33:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |      freopen((inoutname+".out").c_str(),"w",stdout);
      |      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mecho.cpp: In function 'long long int conv(char)':
mecho.cpp:64:1: warning: control reaches end of non-void function [-Wreturn-type]
   64 | }
      | ^

Subtask #1
68.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 110 ms 15692 KB Output is correct
8 Incorrect 1 ms 460 KB Output isn't correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 0 ms 460 KB Output is correct
11 Correct 0 ms 460 KB Output is correct
12 Incorrect 1 ms 1100 KB Output isn't correct
13 Incorrect 1 ms 972 KB Output isn't correct
14 Incorrect 1 ms 1100 KB Output isn't correct
15 Correct 0 ms 460 KB Output is correct
16 Correct 1 ms 460 KB Output is correct
17 Correct 1 ms 588 KB Output is correct
18 Correct 1 ms 588 KB Output is correct
19 Correct 1 ms 716 KB Output is correct
20 Correct 1 ms 588 KB Output is correct
21 Correct 1 ms 844 KB Output is correct
22 Correct 1 ms 844 KB Output is correct
23 Correct 1 ms 972 KB Output is correct
24 Correct 1 ms 972 KB Output is correct
25 Correct 1 ms 1100 KB Output is correct
26 Correct 1 ms 1100 KB Output is correct
27 Correct 1 ms 1100 KB Output is correct
28 Correct 1 ms 1100 KB Output is correct
29 Correct 1 ms 1228 KB Output is correct
30 Correct 1 ms 1228 KB Output is correct
31 Correct 1 ms 1356 KB Output is correct
32 Correct 1 ms 1356 KB Output is correct
33 Correct 6 ms 6860 KB Output is correct
34 Correct 6 ms 6860 KB Output is correct
35 Correct 35 ms 6948 KB Output is correct
36 Correct 7 ms 7816 KB Output is correct
37 Correct 7 ms 7884 KB Output is correct
38 Correct 59 ms 7820 KB Output is correct
39 Correct 12 ms 8860 KB Output is correct
40 Correct 14 ms 8860 KB Output is correct
41 Correct 58 ms 8844 KB Output is correct
42 Correct 10 ms 9676 KB Output is correct
43 Correct 11 ms 9800 KB Output is correct
44 Correct 70 ms 9804 KB Output is correct
45 Correct 11 ms 10740 KB Output is correct
46 Correct 12 ms 10752 KB Output is correct
47 Correct 76 ms 10740 KB Output is correct
48 Correct 13 ms 11596 KB Output is correct
49 Correct 16 ms 11620 KB Output is correct
50 Correct 100 ms 11692 KB Output is correct
51 Correct 15 ms 12620 KB Output is correct
52 Correct 19 ms 12648 KB Output is correct
53 Correct 121 ms 12652 KB Output is correct
54 Correct 18 ms 13588 KB Output is correct
55 Correct 21 ms 13600 KB Output is correct
56 Correct 136 ms 13584 KB Output is correct
57 Correct 19 ms 14540 KB Output is correct
58 Correct 22 ms 14412 KB Output is correct
59 Correct 161 ms 14532 KB Output is correct
60 Correct 24 ms 15432 KB Output is correct
61 Correct 23 ms 15488 KB Output is correct
62 Correct 208 ms 15472 KB Output is correct
63 Correct 167 ms 15480 KB Output is correct
64 Correct 318 ms 15428 KB Output is correct
65 Correct 241 ms 15556 KB Output is correct
66 Correct 220 ms 15476 KB Output is correct
67 Incorrect 177 ms 15476 KB Output isn't correct
68 Correct 88 ms 15528 KB Output is correct
69 Correct 86 ms 15500 KB Output is correct
70 Correct 58 ms 15456 KB Output is correct
71 Correct 70 ms 15524 KB Output is correct
72 Incorrect 50 ms 15492 KB Output isn't correct
73 Incorrect 85 ms 16028 KB Output isn't correct
74 Correct 71 ms 16012 KB Output is correct
75 Correct 102 ms 16144 KB Output is correct
76 Correct 80 ms 16076 KB Output is correct
77 Correct 70 ms 16012 KB Output is correct
78 Incorrect 85 ms 15956 KB Output isn't correct
79 Correct 59 ms 15948 KB Output is correct
80 Correct 65 ms 16068 KB Output is correct
81 Correct 80 ms 16008 KB Output is correct
82 Correct 65 ms 15904 KB Output is correct
83 Correct 106 ms 15908 KB Output is correct
84 Correct 83 ms 15912 KB Output is correct
85 Correct 81 ms 15820 KB Output is correct
86 Correct 93 ms 15940 KB Output is correct
87 Correct 86 ms 15908 KB Output is correct
88 Correct 85 ms 15684 KB Output is correct
89 Correct 85 ms 15764 KB Output is correct
90 Correct 94 ms 15804 KB Output is correct
91 Correct 89 ms 15684 KB Output is correct
92 Correct 106 ms 15804 KB Output is correct