oj.uz

Submission #477639

# Submission time Handle Problem Language Result Execution time Memory
477639 2021-10-02T23:14:14 Z urosk Mecho (IOI09_mecho) C++14
100 / 100
 312 ms 16068 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,mid,rez = -1;
    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;
                a[i][j] = 1;
            }
            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
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 102 ms 15700 KB Output is correct
8 Correct 0 ms 460 KB Output is correct
9 Correct 0 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 0 ms 460 KB Output is correct
12 Correct 1 ms 1100 KB Output is correct
13 Correct 1 ms 972 KB Output is correct
14 Correct 1 ms 1100 KB Output is correct
15 Correct 0 ms 460 KB Output is correct
16 Correct 0 ms 460 KB Output is correct
17 Correct 0 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 716 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 2 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 1308 KB Output is correct
33 Correct 5 ms 6860 KB Output is correct
34 Correct 6 ms 6860 KB Output is correct
35 Correct 29 ms 6924 KB Output is correct
36 Correct 7 ms 7884 KB Output is correct
37 Correct 8 ms 7884 KB Output is correct
38 Correct 35 ms 7884 KB Output is correct
39 Correct 8 ms 8780 KB Output is correct
40 Correct 11 ms 8780 KB Output is correct
41 Correct 51 ms 8924 KB Output is correct
42 Correct 9 ms 9796 KB Output is correct
43 Correct 10 ms 9804 KB Output is correct
44 Correct 61 ms 9796 KB Output is correct
45 Correct 10 ms 10700 KB Output is correct
46 Correct 10 ms 10740 KB Output is correct
47 Correct 68 ms 10700 KB Output is correct
48 Correct 12 ms 11596 KB Output is correct
49 Correct 13 ms 11620 KB Output is correct
50 Correct 95 ms 11596 KB Output is correct
51 Correct 14 ms 12620 KB Output is correct
52 Correct 15 ms 12620 KB Output is correct
53 Correct 119 ms 12656 KB Output is correct
54 Correct 15 ms 13516 KB Output is correct
55 Correct 22 ms 13516 KB Output is correct
56 Correct 143 ms 13540 KB Output is correct
57 Correct 17 ms 14540 KB Output is correct
58 Correct 18 ms 14420 KB Output is correct
59 Correct 163 ms 14536 KB Output is correct
60 Correct 20 ms 15436 KB Output is correct
61 Correct 19 ms 15392 KB Output is correct
62 Correct 181 ms 15440 KB Output is correct
63 Correct 157 ms 15476 KB Output is correct
64 Correct 312 ms 15488 KB Output is correct
65 Correct 224 ms 15440 KB Output is correct
66 Correct 177 ms 15472 KB Output is correct
67 Correct 179 ms 15428 KB Output is correct
68 Correct 72 ms 15488 KB Output is correct
69 Correct 66 ms 15496 KB Output is correct
70 Correct 47 ms 15428 KB Output is correct
71 Correct 59 ms 15528 KB Output is correct
72 Correct 42 ms 15480 KB Output is correct
73 Correct 41 ms 15968 KB Output is correct
74 Correct 74 ms 15972 KB Output is correct
75 Correct 87 ms 16068 KB Output is correct
76 Correct 82 ms 16020 KB Output is correct
77 Correct 72 ms 15972 KB Output is correct
78 Correct 87 ms 15984 KB Output is correct
79 Correct 62 ms 15944 KB Output is correct
80 Correct 72 ms 15952 KB Output is correct
81 Correct 70 ms 15952 KB Output is correct
82 Correct 65 ms 15996 KB Output is correct
83 Correct 91 ms 15912 KB Output is correct
84 Correct 76 ms 15812 KB Output is correct
85 Correct 81 ms 15820 KB Output is correct
86 Correct 87 ms 15912 KB Output is correct
87 Correct 102 ms 15864 KB Output is correct
88 Correct 90 ms 15684 KB Output is correct
89 Correct 81 ms 15684 KB Output is correct
90 Correct 96 ms 15780 KB Output is correct
91 Correct 95 ms 15776 KB Output is correct
92 Correct 104 ms 15812 KB Output is correct