oj.uz

Submission #477640

# Submission time Handle Problem Language Result Execution time Memory
477640 2021-10-02T23:14:43 Z urosk Mecho (IOI09_mecho) C++14
100 / 100
 326 ms 16184 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/2,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 1 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 1 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 87 ms 15700 KB Output is correct
8 Correct 1 ms 460 KB Output is correct
9 Correct 0 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 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 1 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 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 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 6948 KB Output is correct
34 Correct 6 ms 6860 KB Output is correct
35 Correct 29 ms 6936 KB Output is correct
36 Correct 7 ms 7868 KB Output is correct
37 Correct 7 ms 7884 KB Output is correct
38 Correct 53 ms 7884 KB Output is correct
39 Correct 9 ms 8836 KB Output is correct
40 Correct 8 ms 8836 KB Output is correct
41 Correct 50 ms 8852 KB Output is correct
42 Correct 9 ms 9676 KB Output is correct
43 Correct 11 ms 9804 KB Output is correct
44 Correct 60 ms 9796 KB Output is correct
45 Correct 11 ms 10700 KB Output is correct
46 Correct 12 ms 10736 KB Output is correct
47 Correct 82 ms 10748 KB Output is correct
48 Correct 12 ms 11596 KB Output is correct
49 Correct 14 ms 11628 KB Output is correct
50 Correct 85 ms 11692 KB Output is correct
51 Correct 13 ms 12588 KB Output is correct
52 Correct 15 ms 12644 KB Output is correct
53 Correct 124 ms 12652 KB Output is correct
54 Correct 17 ms 13516 KB Output is correct
55 Correct 17 ms 13532 KB Output is correct
56 Correct 136 ms 13588 KB Output is correct
57 Correct 18 ms 14540 KB Output is correct
58 Correct 19 ms 14540 KB Output is correct
59 Correct 158 ms 14532 KB Output is correct
60 Correct 21 ms 15436 KB Output is correct
61 Correct 19 ms 15440 KB Output is correct
62 Correct 196 ms 15428 KB Output is correct
63 Correct 157 ms 15480 KB Output is correct
64 Correct 326 ms 15480 KB Output is correct
65 Correct 235 ms 15528 KB Output is correct
66 Correct 191 ms 15484 KB Output is correct
67 Correct 198 ms 15436 KB Output is correct
68 Correct 74 ms 15492 KB Output is correct
69 Correct 74 ms 15428 KB Output is correct
70 Correct 56 ms 15496 KB Output is correct
71 Correct 63 ms 15476 KB Output is correct
72 Correct 40 ms 15492 KB Output is correct
73 Correct 44 ms 15968 KB Output is correct
74 Correct 74 ms 15984 KB Output is correct
75 Correct 85 ms 16184 KB Output is correct
76 Correct 74 ms 16072 KB Output is correct
77 Correct 83 ms 16020 KB Output is correct
78 Correct 91 ms 15964 KB Output is correct
79 Correct 59 ms 15944 KB Output is correct
80 Correct 60 ms 16000 KB Output is correct
81 Correct 70 ms 16072 KB Output is correct
82 Correct 80 ms 15952 KB Output is correct
83 Correct 82 ms 15820 KB Output is correct
84 Correct 79 ms 15912 KB Output is correct
85 Correct 76 ms 15820 KB Output is correct
86 Correct 90 ms 15872 KB Output is correct
87 Correct 98 ms 15812 KB Output is correct
88 Correct 81 ms 15768 KB Output is correct
89 Correct 99 ms 15800 KB Output is correct
90 Correct 97 ms 15700 KB Output is correct
91 Correct 89 ms 15764 KB Output is correct
92 Correct 107 ms 15884 KB Output is correct