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Submission #106133

# Submission time Handle Problem Language Result Execution time Memory
106133 2019-04-16T18:03:28 Z eriksuenderhauf Park (BOI16_park) C++11
100 / 100
 476 ms 41584 KB 
//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define enl printf("\n")
#define case(t) printf("Case #%d: ", (t))
#define ni(n) scanf("%d", &(n))
#define nl(n) scanf("%lld", &(n))
#define nai(a, n) for (int i = 0; i < (n); i++) ni(a[i])
#define nal(a, n) for (int i = 0; i < (n); i++) nl(a[i])
#define pri(n) printf("%d\n", (n))
#define prl(n) printf("%lld\n", (n))
#define mem(a,v) memset((a),(v),sizeof(a))
#define pii pair<int, int>
#define pil pair<int, long long>
#define pll pair<long long, long long>
#define vii vector<pii>
#define vil vector<pil>
#define vll vector<pll>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef cc_hash_table<int,int,hash<int>> ht;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> oset;
const double pi = acos(-1);
const int MOD = 1e9 + 7;
const int INF = 1e9 + 7;
const int MAXN = 2e3 + 5;
const double eps = 1e-9;
int adj[MAXN][MAXN], ans[4][4], x[MAXN], y[MAXN], r[MAXN], par[MAXN];
int mx[MAXN][MAXN];
vi adj2[MAXN];
vector<pair<int,pii>> edg;

int qry(int x) { return x == par[x] ? x : par[x] = qry(par[x]); }
void join(int u, int v) { u = qry(u), v = qry(v); par[u] = v; }

void dfs(int u, int p, int root, int val) {
	mx[root][u] = val;
	for (int v: adj2[u])
		if (v != p)
			dfs(v, u, root, max(val, adj[u][v]));
}

int main() {
	memset(adj,0x3f,sizeof adj);
    int n, m, w, h;
    scanf("%d %d %d %d", &n, &m, &w, &h);
    for (int j = n; j <= n + 4; j++) {
    	par[j] = j;
    	for (int i = n; i < j; i++)
    		edg.pb({0x3fffffff, {i, j}});
    }
    for (int i = 0; i < n; i++) {
    	par[i] = i;
    	scanf("%d %d %d", &x[i], &y[i], &r[i]);
    	for (int j = 0; j < i; j++) {
    		adj[i][j] = adj[j][i] = (int) floor((hypot(x[i]-x[j],y[i]-y[j])-r[i]-r[j])/2.+eps);
    		edg.pb({adj[i][j], {i, j}});
    	}
    	adj[i][n+0]=adj[n+0][i]=(y[i]-r[i])/2;
    	adj[i][n+1]=adj[n+1][i]=(x[i]-r[i])/2;
    	adj[i][n+2]=adj[n+2][i]=(w-x[i]-r[i])/2;
    	adj[i][n+3]=adj[n+3][i]=(h-y[i]-r[i])/2;
    	for (int j = 0; j < 4; j++)
    		edg.pb({adj[i][n+j], {i, n+j}});
    }
    sort(edg.begin(), edg.end());
    for (int i = 0; i < edg.size(); i++) {
    	int w = edg[i].fi, u, v;
    	tie(u, v) = edg[i].se;
    	if (qry(u) != qry(v))
    		adj2[u].pb(v), adj2[v].pb(u);
    	join(u, v);
    }
    for (int i = n; i < n + 4; i++) {
    	dfs(i, -1, i, 0);
    	ans[i-n][i-n]=0x3fffffff;
    }
    ans[0][1]=ans[1][0]=min(mx[n][n+1],min(mx[n][n+2],mx[n][n+3]));
    ans[0][2]=ans[2][0]=min(min(mx[n][n+1],mx[n][n+3]),min(mx[n+2][n+1],mx[n+2][n+3]));
    ans[0][3]=ans[3][0]=min(mx[n+1][n],min(mx[n+1][n+2],mx[n+1][n+3]));
    ans[1][2]=ans[2][1]=min(mx[n+2][n],min(mx[n+2][n+1],mx[n+2][n+3]));
    ans[1][3]=ans[3][1]=min(min(mx[n][n+2],mx[n][n+3]),min(mx[n+1][n+2],mx[n+1][n+3]));
    ans[2][3]=ans[3][2]=min(mx[n+3][n],min(mx[n+3][n+1],mx[n+3][n+2]));
    for (int i = 0; i < m; i++) {
    	int r, e;
    	scanf("%d %d", &r, &e);
    	for (int j = 0; j < 4; j++)
    		if (r <= ans[e-1][j])
    			printf("%d", j+1);
    	printf("\n");
    }
}

Compilation message

park.cpp: In function 'int main()':
park.cpp:75:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < edg.size(); i++) {
                     ~~^~~~~~~~~~~~
park.cpp:76:10: warning: unused variable 'w' [-Wunused-variable]
      int w = edg[i].fi, u, v;
          ^
park.cpp:54:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d %d", &n, &m, &w, &h);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
park.cpp:62:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
      scanf("%d %d %d", &x[i], &y[i], &r[i]);
      ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
park.cpp:94:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
      scanf("%d %d", &r, &e);
      ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 392 ms 40904 KB Output is correct
2 Correct 406 ms 41316 KB Output is correct
3 Correct 388 ms 41048 KB Output is correct
4 Correct 426 ms 40944 KB Output is correct
5 Correct 398 ms 41036 KB Output is correct
6 Correct 417 ms 41008 KB Output is correct
7 Correct 350 ms 40904 KB Output is correct
8 Correct 355 ms 40904 KB Output is correct
9 Correct 16 ms 16128 KB Output is correct
10 Correct 15 ms 16128 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 69 ms 17948 KB Output is correct
2 Correct 72 ms 18036 KB Output is correct
3 Correct 63 ms 17908 KB Output is correct
4 Correct 65 ms 18064 KB Output is correct
5 Correct 68 ms 17876 KB Output is correct
6 Correct 75 ms 18164 KB Output is correct
7 Correct 59 ms 17700 KB Output is correct
8 Correct 57 ms 17656 KB Output is correct

Subtask #3
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 392 ms 40904 KB Output is correct
2 Correct 406 ms 41316 KB Output is correct
3 Correct 388 ms 41048 KB Output is correct
4 Correct 426 ms 40944 KB Output is correct
5 Correct 398 ms 41036 KB Output is correct
6 Correct 417 ms 41008 KB Output is correct
7 Correct 350 ms 40904 KB Output is correct
8 Correct 355 ms 40904 KB Output is correct
9 Correct 16 ms 16128 KB Output is correct
10 Correct 15 ms 16128 KB Output is correct
11 Correct 69 ms 17948 KB Output is correct
12 Correct 72 ms 18036 KB Output is correct
13 Correct 63 ms 17908 KB Output is correct
14 Correct 65 ms 18064 KB Output is correct
15 Correct 68 ms 17876 KB Output is correct
16 Correct 75 ms 18164 KB Output is correct
17 Correct 59 ms 17700 KB Output is correct
18 Correct 57 ms 17656 KB Output is correct
19 Correct 439 ms 41392 KB Output is correct
20 Correct 433 ms 41240 KB Output is correct
21 Correct 440 ms 41296 KB Output is correct
22 Correct 444 ms 41260 KB Output is correct
23 Correct 476 ms 41264 KB Output is correct
24 Correct 419 ms 41584 KB Output is correct