oj.uz

Submission #477637

# Submission time Handle Problem Language Result Execution time Memory
477637 2021-10-02T23:13:04 Z urosk Mecho (IOI09_mecho) C++14
84 / 100
 317 ms 16076 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 = 2*n*n,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;
                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
84.0 / 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 1 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 1 ms 332 KB Output is correct
7 Correct 94 ms 15708 KB Output is correct
8 Incorrect 1 ms 460 KB Output isn't 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 Incorrect 1 ms 1100 KB Output isn't correct
15 Correct 0 ms 460 KB Output is correct
16 Correct 0 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 588 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 2 ms 1228 KB Output is correct
30 Correct 1 ms 1184 KB Output is correct
31 Correct 1 ms 1356 KB Output is correct
32 Correct 1 ms 1356 KB Output is correct
33 Correct 5 ms 6860 KB Output is correct
34 Correct 6 ms 6880 KB Output is correct
35 Correct 27 ms 6960 KB Output is correct
36 Correct 6 ms 7884 KB Output is correct
37 Correct 8 ms 7884 KB Output is correct
38 Correct 43 ms 7820 KB Output is correct
39 Correct 8 ms 8780 KB Output is correct
40 Correct 13 ms 8780 KB Output is correct
41 Correct 50 ms 8860 KB Output is correct
42 Correct 9 ms 9804 KB Output is correct
43 Correct 13 ms 9804 KB Output is correct
44 Correct 64 ms 9804 KB Output is correct
45 Correct 11 ms 10756 KB Output is correct
46 Correct 11 ms 10700 KB Output is correct
47 Correct 71 ms 10752 KB Output is correct
48 Correct 12 ms 11596 KB Output is correct
49 Correct 13 ms 11596 KB Output is correct
50 Correct 86 ms 11636 KB Output is correct
51 Correct 14 ms 12648 KB Output is correct
52 Correct 20 ms 12772 KB Output is correct
53 Correct 116 ms 12652 KB Output is correct
54 Correct 16 ms 13588 KB Output is correct
55 Correct 16 ms 13516 KB Output is correct
56 Correct 128 ms 13544 KB Output is correct
57 Correct 19 ms 14540 KB Output is correct
58 Correct 19 ms 14428 KB Output is correct
59 Correct 185 ms 14560 KB Output is correct
60 Correct 20 ms 15436 KB Output is correct
61 Correct 22 ms 15436 KB Output is correct
62 Correct 171 ms 15476 KB Output is correct
63 Correct 188 ms 15440 KB Output is correct
64 Correct 317 ms 15476 KB Output is correct
65 Correct 234 ms 15484 KB Output is correct
66 Correct 185 ms 15484 KB Output is correct
67 Incorrect 182 ms 15572 KB Output isn't correct
68 Correct 72 ms 15432 KB Output is correct
69 Correct 70 ms 15428 KB Output is correct
70 Correct 49 ms 15452 KB Output is correct
71 Correct 59 ms 15456 KB Output is correct
72 Correct 39 ms 15436 KB Output is correct
73 Correct 39 ms 15968 KB Output is correct
74 Correct 87 ms 16012 KB Output is correct
75 Correct 89 ms 16024 KB Output is correct
76 Correct 82 ms 16076 KB Output is correct
77 Correct 67 ms 16028 KB Output is correct
78 Incorrect 113 ms 15944 KB Output isn't correct
79 Correct 54 ms 15992 KB Output is correct
80 Correct 75 ms 15996 KB Output is correct
81 Correct 81 ms 16012 KB Output is correct
82 Correct 86 ms 15956 KB Output is correct
83 Correct 119 ms 15872 KB Output is correct
84 Correct 81 ms 15812 KB Output is correct
85 Correct 90 ms 15812 KB Output is correct
86 Correct 77 ms 15816 KB Output is correct
87 Correct 94 ms 15828 KB Output is correct
88 Correct 83 ms 15820 KB Output is correct
89 Correct 80 ms 15764 KB Output is correct
90 Correct 85 ms 15772 KB Output is correct
91 Correct 86 ms 15772 KB Output is correct
92 Correct 108 ms 15892 KB Output is correct