oj.uz

Submission #477636

# Submission time Handle Problem Language Result Execution time Memory
477636 2021-10-02T23:11:59 Z urosk Mecho (IOI09_mecho) C++14
84 / 100
 319 ms 16064 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;
                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 1 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 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 117 ms 15620 KB Output is correct
8 Incorrect 0 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 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 1 ms 460 KB Output is correct
16 Correct 1 ms 460 KB Output is correct
17 Correct 1 ms 608 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 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 26 ms 6860 KB Output is correct
36 Correct 6 ms 7884 KB Output is correct
37 Correct 8 ms 7884 KB Output is correct
38 Correct 39 ms 7900 KB Output is correct
39 Correct 8 ms 8780 KB Output is correct
40 Correct 8 ms 8780 KB Output is correct
41 Correct 51 ms 8780 KB Output is correct
42 Correct 9 ms 9796 KB Output is correct
43 Correct 11 ms 9804 KB Output is correct
44 Correct 76 ms 9804 KB Output is correct
45 Correct 11 ms 10700 KB Output is correct
46 Correct 11 ms 10700 KB Output is correct
47 Correct 71 ms 10740 KB Output is correct
48 Correct 12 ms 11628 KB Output is correct
49 Correct 13 ms 11596 KB Output is correct
50 Correct 88 ms 11636 KB Output is correct
51 Correct 14 ms 12652 KB Output is correct
52 Correct 14 ms 12620 KB Output is correct
53 Correct 117 ms 12620 KB Output is correct
54 Correct 16 ms 13532 KB Output is correct
55 Correct 16 ms 13516 KB Output is correct
56 Correct 129 ms 13592 KB Output is correct
57 Correct 18 ms 14544 KB Output is correct
58 Correct 19 ms 14412 KB Output is correct
59 Correct 149 ms 14668 KB Output is correct
60 Correct 19 ms 15436 KB Output is correct
61 Correct 19 ms 15368 KB Output is correct
62 Correct 175 ms 15428 KB Output is correct
63 Correct 156 ms 15432 KB Output is correct
64 Correct 319 ms 15480 KB Output is correct
65 Correct 230 ms 15436 KB Output is correct
66 Correct 211 ms 15472 KB Output is correct
67 Incorrect 199 ms 15480 KB Output isn't correct
68 Correct 74 ms 15612 KB Output is correct
69 Correct 68 ms 15504 KB Output is correct
70 Correct 52 ms 15440 KB Output is correct
71 Correct 63 ms 15436 KB Output is correct
72 Correct 44 ms 15536 KB Output is correct
73 Correct 47 ms 15976 KB Output is correct
74 Correct 85 ms 16016 KB Output is correct
75 Correct 78 ms 15940 KB Output is correct
76 Correct 68 ms 15964 KB Output is correct
77 Correct 71 ms 16064 KB Output is correct
78 Incorrect 97 ms 15992 KB Output isn't correct
79 Correct 56 ms 15908 KB Output is correct
80 Correct 64 ms 15940 KB Output is correct
81 Correct 72 ms 15976 KB Output is correct
82 Correct 63 ms 15940 KB Output is correct
83 Correct 84 ms 15836 KB Output is correct
84 Correct 75 ms 15912 KB Output is correct
85 Correct 83 ms 15812 KB Output is correct
86 Correct 79 ms 15880 KB Output is correct
87 Correct 85 ms 15924 KB Output is correct
88 Correct 85 ms 15768 KB Output is correct
89 Correct 82 ms 15804 KB Output is correct
90 Correct 85 ms 15820 KB Output is correct
91 Correct 95 ms 15896 KB Output is correct
92 Correct 95 ms 15824 KB Output is correct