# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
1097083 |
2024-10-06T03:30:36 Z |
InvMOD |
Mecho (IOI09_mecho) |
C++14 |
|
228 ms |
6396 KB |
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define gcd __gcd
#define sz(v) (int) v.size()
#define pb push_back
#define pi pair<int,int>
#define all(v) (v).begin(), (v).end()
#define compact(v) (v).erase(unique(all(v)), (v).end())
#define FOR(i, a, b) for(int i = (a); i <= (b); i++)
///#define int long long
using ll = long long;
using ld = long double;
using ull = unsigned long long;
template<typename T> bool ckmx(T& a, const T& b){if(a < b) return a = b, true; return false;}
template<typename T> bool ckmn(T& a, const T& b){if(a > b) return a = b, true; return false;}
const int N = 8e2+5;
const ll MOD = 1e9+7;
const ll INF = 1e18;
const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, 1, -1};
int n, s, d[N][N], vis[N][N];
char a[N][N];
bool init(int x, int y){
return (x >= 1 && x <= n) && (y >= 1 && y <= n) && a[x][y] != 'T';
}
bool good(int time){
pi st, ed;
FOR(i, 1, n){
FOR(j, 1, n){
if(a[i][j] == 'M'){
st = make_pair(i,j);
vis[i][j] = time*s;
}
else{
if(a[i][j] == 'D'){
ed = make_pair(i, j);
}
vis[i][j] = 1e9;
}
}
}
queue<pair<int,int>> q;
q.push(st);
while(sz(q)){
pi e = q.front(); q.pop();
int x = e.fi, y = e.se;
for(int i = 0; i < 4; i++){
int xx = x + dx[i];
int yy = y + dy[i];
if(init(xx, yy) && vis[xx][yy] == 1e9 && a[xx][yy] != 'H'){
int n_dist = (vis[x][y] + 1) / s;
if(n_dist < d[xx][yy]){
vis[xx][yy] = vis[x][y] + 1;
q.push(make_pair(xx, yy));
}
}
}
}
return vis[ed.fi][ed.se] != 1e9;
}
void solve()
{
cin >> n >> s;
FOR(i, 1, n){
FOR(j, 1, n){
cin >> a[i][j];
}
}
queue<pair<int,int>> q;
FOR(i, 1, n){
FOR(j, 1, n){
if(a[i][j] == 'H'){
q.push(make_pair(i,j));
}
else d[i][j] = 1e9;
}
}
while(sz(q)){
pi e = q.front(); q.pop();
int x = e.fi, y = e.se;
for(int i = 0; i < 4; i++){
int xx = x + dx[i];
int yy = y + dy[i];
if(init(xx, yy) && d[xx][yy] == 1e9 && a[xx][yy] != 'D'){
d[xx][yy] = d[x][y] + 1;
q.push(make_pair(xx, yy));
}
}
}
int l = -1, r = 1e9;
while(l+1 < r){
int m = l+r>>1;
if(good(m)){
l = m;
}
else r = m;
}
cout << l <<"\n";
}
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
#define name "InvMOD"
if(fopen(name".INP", "r")){
freopen(name".INP","r",stdin);
freopen(name".OUT","w",stdout);
}
int t = 1; //cin >> t;
while(t--) solve();
return 0;
}
Compilation message
mecho.cpp: In function 'void solve()':
mecho.cpp:114:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
114 | int m = l+r>>1;
| ~^~
mecho.cpp: In function 'int main()':
mecho.cpp:131:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
131 | freopen(name".INP","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
mecho.cpp:132:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
132 | freopen(name".OUT","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
600 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Incorrect |
176 ms |
6236 KB |
Output isn't correct |
8 |
Correct |
0 ms |
344 KB |
Output is correct |
9 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
10 |
Correct |
0 ms |
344 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Incorrect |
1 ms |
860 KB |
Output isn't correct |
13 |
Incorrect |
0 ms |
604 KB |
Output isn't correct |
14 |
Incorrect |
2 ms |
860 KB |
Output isn't correct |
15 |
Correct |
0 ms |
604 KB |
Output is correct |
16 |
Incorrect |
1 ms |
600 KB |
Output isn't correct |
17 |
Correct |
0 ms |
604 KB |
Output is correct |
18 |
Incorrect |
0 ms |
604 KB |
Output isn't correct |
19 |
Correct |
0 ms |
600 KB |
Output is correct |
20 |
Incorrect |
1 ms |
600 KB |
Output isn't correct |
21 |
Correct |
1 ms |
604 KB |
Output is correct |
22 |
Incorrect |
0 ms |
604 KB |
Output isn't correct |
23 |
Correct |
0 ms |
604 KB |
Output is correct |
24 |
Incorrect |
1 ms |
604 KB |
Output isn't correct |
25 |
Correct |
1 ms |
724 KB |
Output is correct |
26 |
Incorrect |
1 ms |
860 KB |
Output isn't correct |
27 |
Correct |
1 ms |
860 KB |
Output is correct |
28 |
Incorrect |
1 ms |
940 KB |
Output isn't correct |
29 |
Correct |
1 ms |
860 KB |
Output is correct |
30 |
Incorrect |
1 ms |
860 KB |
Output isn't correct |
31 |
Correct |
1 ms |
860 KB |
Output is correct |
32 |
Incorrect |
1 ms |
860 KB |
Output isn't correct |
33 |
Correct |
7 ms |
2872 KB |
Output is correct |
34 |
Incorrect |
13 ms |
2960 KB |
Output isn't correct |
35 |
Incorrect |
37 ms |
3156 KB |
Output isn't correct |
36 |
Correct |
14 ms |
3168 KB |
Output is correct |
37 |
Incorrect |
15 ms |
3164 KB |
Output isn't correct |
38 |
Incorrect |
47 ms |
3252 KB |
Output isn't correct |
39 |
Correct |
9 ms |
3420 KB |
Output is correct |
40 |
Incorrect |
17 ms |
3656 KB |
Output isn't correct |
41 |
Incorrect |
52 ms |
3416 KB |
Output isn't correct |
42 |
Correct |
11 ms |
3932 KB |
Output is correct |
43 |
Incorrect |
23 ms |
3976 KB |
Output isn't correct |
44 |
Incorrect |
76 ms |
3932 KB |
Output isn't correct |
45 |
Correct |
16 ms |
4188 KB |
Output is correct |
46 |
Incorrect |
30 ms |
4188 KB |
Output isn't correct |
47 |
Incorrect |
80 ms |
4188 KB |
Output isn't correct |
48 |
Correct |
16 ms |
4696 KB |
Output is correct |
49 |
Incorrect |
33 ms |
4700 KB |
Output isn't correct |
50 |
Incorrect |
115 ms |
4700 KB |
Output isn't correct |
51 |
Correct |
20 ms |
4952 KB |
Output is correct |
52 |
Incorrect |
29 ms |
4952 KB |
Output isn't correct |
53 |
Incorrect |
121 ms |
4956 KB |
Output isn't correct |
54 |
Correct |
22 ms |
5208 KB |
Output is correct |
55 |
Incorrect |
40 ms |
5212 KB |
Output isn't correct |
56 |
Incorrect |
121 ms |
5208 KB |
Output isn't correct |
57 |
Correct |
23 ms |
5720 KB |
Output is correct |
58 |
Incorrect |
53 ms |
5720 KB |
Output isn't correct |
59 |
Incorrect |
130 ms |
5764 KB |
Output isn't correct |
60 |
Correct |
31 ms |
5980 KB |
Output is correct |
61 |
Incorrect |
58 ms |
6120 KB |
Output isn't correct |
62 |
Incorrect |
174 ms |
5976 KB |
Output isn't correct |
63 |
Correct |
81 ms |
5980 KB |
Output is correct |
64 |
Incorrect |
225 ms |
6232 KB |
Output isn't correct |
65 |
Correct |
123 ms |
5980 KB |
Output is correct |
66 |
Correct |
91 ms |
6120 KB |
Output is correct |
67 |
Correct |
83 ms |
5980 KB |
Output is correct |
68 |
Incorrect |
176 ms |
6144 KB |
Output isn't correct |
69 |
Incorrect |
159 ms |
6152 KB |
Output isn't correct |
70 |
Incorrect |
200 ms |
6204 KB |
Output isn't correct |
71 |
Incorrect |
191 ms |
6148 KB |
Output isn't correct |
72 |
Incorrect |
145 ms |
5972 KB |
Output isn't correct |
73 |
Incorrect |
185 ms |
6396 KB |
Output isn't correct |
74 |
Incorrect |
142 ms |
6224 KB |
Output isn't correct |
75 |
Incorrect |
156 ms |
6396 KB |
Output isn't correct |
76 |
Incorrect |
155 ms |
6396 KB |
Output isn't correct |
77 |
Incorrect |
156 ms |
6208 KB |
Output isn't correct |
78 |
Incorrect |
186 ms |
6224 KB |
Output isn't correct |
79 |
Incorrect |
169 ms |
6380 KB |
Output isn't correct |
80 |
Incorrect |
154 ms |
6236 KB |
Output isn't correct |
81 |
Incorrect |
130 ms |
6236 KB |
Output isn't correct |
82 |
Incorrect |
157 ms |
6228 KB |
Output isn't correct |
83 |
Incorrect |
180 ms |
6336 KB |
Output isn't correct |
84 |
Incorrect |
158 ms |
6236 KB |
Output isn't correct |
85 |
Incorrect |
128 ms |
6224 KB |
Output isn't correct |
86 |
Incorrect |
162 ms |
6236 KB |
Output isn't correct |
87 |
Incorrect |
139 ms |
6232 KB |
Output isn't correct |
88 |
Incorrect |
170 ms |
6280 KB |
Output isn't correct |
89 |
Incorrect |
152 ms |
6232 KB |
Output isn't correct |
90 |
Incorrect |
228 ms |
6232 KB |
Output isn't correct |
91 |
Incorrect |
178 ms |
6284 KB |
Output isn't correct |
92 |
Incorrect |
175 ms |
6228 KB |
Output isn't correct |