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Submission #977918

# Submission time Handle Problem Language Result Execution time Memory
977918 2024-05-08T13:54:05 Z SmuggingSpun Jakarta Skyscrapers (APIO15_skyscraper) C++14
57 / 100
 155 ms 33104 KB 
#include<bits/stdc++.h>
#define taskname "skyscraper"
using namespace std;
typedef long long ll;
template<class T>bool minimize(T& a, T b){
	if(a > b){
		a = b;
		return true;
	}
	return false;
}
const int lim = 3e4 + 5;
int n, m, b[lim], p[lim];
namespace sub1{
	void solve(){
		if(m == 2){
			return void(cout << (abs(b[0] - b[1]) % p[0] == 0 ? abs(b[0] - b[1]) / p[0] : -1));
		}
		int ans = (abs(b[0] - b[1]) % p[0] == 0 ? abs(b[0] - b[1]) / p[0] : INT_MAX);
		if(abs(b[0] - b[2]) % p[0] == 0 && abs(b[2] - b[1]) % p[2] == 0){
			minimize(ans, abs(b[0] - b[2]) / p[0] + abs(b[2] - b[1]) / p[2]);
		}
		cout << (ans == INT_MAX ? -1 : ans);
	}
}
namespace sub23{
	const int LIM = 2e3 + 5;
	int d[LIM];
	void solve(){
		priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>>pq;
		memset(d, 0x0f, sizeof(d));
		pq.emplace(d[0] = 0, 0);
		while(!pq.empty()){
			auto [w, u] = pq.top();
			pq.pop();
			if(w == d[u]){
				for(int v = 0; v < m; v++){
					if(abs(b[u] - b[v]) % p[u] == 0 && minimize(d[v], w + abs(b[u] - b[v]) / p[u])){
						pq.emplace(d[v], v);
					}
				}
			}
		}
		cout << (d[1] == d[LIM - 1] ? -1 : d[1]);
	}
}
namespace sub4{
	const int LIM = 2e3 + 5;
	int d[LIM];
	vector<int>pos[LIM];
	void solve(){
		priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>>pq;
		memset(d, 0x0f, sizeof(d));
		pq.emplace(d[b[0]] = 0, b[0]);
		for(int i = 0; i < m; i++){
			pos[b[i]].emplace_back(i);
		}
		while(!pq.empty()){
			auto [w, u] = pq.top();
			pq.pop();
			if(u == b[1]){
				return void(cout << w);
			}
			if(w == d[u]){
				for(int& index : pos[u]){
					for(int v = u - p[index], cnt = 1; v > -1; v -= p[index], cnt++){
						if(minimize(d[v], w + cnt)){
							pq.emplace(d[v], v);
						}
					}
					for(int v = u + p[index], cnt = 1; v < n; v += p[index], cnt++){
						if(minimize(d[v], w + cnt)){
							pq.emplace(d[v], v);
						}
					}
				}
			}
		}
		cout << -1;
	}
}
namespace sub5{
	const int SIZE = 200;
	vector<int>pos[lim];
	vector<vector<int>>e[SIZE];
	int d[lim];
	void solve(){
		for(int i = 1; i < SIZE; i++){
			e[i].resize(i);
		}
		for(int i = 0; i < m; i++){
			pos[b[i]].emplace_back(i);
			for(int j = 1; j < SIZE; j++){
				e[j][b[i] % j].emplace_back(b[i]);
			}
		}
		for(int i = 0; i < n; i++){
			sort(pos[i].begin(), pos[i].end());
			pos[i].resize(unique(pos[i].begin(), pos[i].end()) - pos[i].begin());
		}
		priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>>pq;
		memset(d, 0x0f, sizeof(d));
		pq.emplace(d[b[0]] = 0, 0);
		while(!pq.empty()){
			auto [w, u] = pq.top();
			pq.pop();
			if(u == b[1]){
				return void(cout << w);
			}
			if(w == d[u]){
				for(int& index : pos[u]){
					if(p[index] < SIZE){
						for(int& v : e[p[index]][u % p[index]]){
							if(minimize(d[v], w + abs(v - u) / p[index])){
								pq.emplace(d[v], v);
							}
						}
					}
					else{
						for(int v = u - p[index], cnt = 1; v > -1; v -= p[index], cnt++){
							if(minimize(d[v], w + cnt)){
								pq.emplace(d[v], v);
							}
						}
						for(int v = u + p[index], cnt = 1; v < n; v += p[index], cnt++){
							if(minimize(d[v], w + cnt)){
								pq.emplace(d[v], v);
							}
						}
					}
				}
			}
		}
		cout << -1;
	}
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
	cin >> n >> m;
	for(int i = 0; i < m; i++){
		cin >> b[i] >> p[i];
	}
	if(n <= 10 && m <= 3){
		sub1::solve();
	}
	else if(n <= 2000 && m <= 2000){
		sub23::solve();
	}
	else if(n <= 2000){
		sub4::solve();
	}
	else{
		sub5::solve();
	}
}

Compilation message

skyscraper.cpp: In function 'void sub23::solve()':
skyscraper.cpp:34:9: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   34 |    auto [w, u] = pq.top();
      |         ^
skyscraper.cpp: In function 'void sub4::solve()':
skyscraper.cpp:59:9: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   59 |    auto [w, u] = pq.top();
      |         ^
skyscraper.cpp: In function 'void sub5::solve()':
skyscraper.cpp:105:9: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  105 |    auto [w, u] = pq.top();
      |         ^
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:140:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  140 |   freopen(taskname".inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1116 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 1 ms 1116 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1116 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1116 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 1 ms 1116 KB Output is correct
4 Correct 1 ms 1060 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1116 KB Output is correct
8 Correct 1 ms 1116 KB Output is correct
9 Correct 1 ms 1112 KB Output is correct
10 Correct 2 ms 1116 KB Output is correct
11 Correct 22 ms 1124 KB Output is correct
12 Correct 19 ms 1112 KB Output is correct
13 Correct 19 ms 1112 KB Output is correct
14 Correct 20 ms 1368 KB Output is correct
15 Correct 22 ms 1116 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1112 KB Output is correct
2 Correct 1 ms 1112 KB Output is correct
3 Correct 1 ms 1116 KB Output is correct
4 Correct 1 ms 1124 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 2 ms 1112 KB Output is correct
8 Correct 1 ms 1112 KB Output is correct
9 Correct 1 ms 1268 KB Output is correct
10 Correct 2 ms 1116 KB Output is correct
11 Correct 21 ms 1116 KB Output is correct
12 Correct 19 ms 1448 KB Output is correct
13 Correct 18 ms 1116 KB Output is correct
14 Correct 20 ms 1116 KB Output is correct
15 Correct 20 ms 1116 KB Output is correct
16 Correct 1 ms 1112 KB Output is correct
17 Correct 16 ms 1116 KB Output is correct
18 Correct 2 ms 1272 KB Output is correct
19 Correct 2 ms 1332 KB Output is correct
20 Correct 23 ms 1116 KB Output is correct
21 Correct 1 ms 1116 KB Output is correct
22 Correct 1 ms 1116 KB Output is correct
23 Correct 5 ms 1116 KB Output is correct
24 Correct 17 ms 1288 KB Output is correct
25 Correct 19 ms 1116 KB Output is correct
26 Correct 19 ms 1112 KB Output is correct
27 Correct 19 ms 1288 KB Output is correct
28 Correct 19 ms 1112 KB Output is correct
29 Correct 4 ms 1116 KB Output is correct
30 Correct 1 ms 1268 KB Output is correct
31 Correct 3 ms 1112 KB Output is correct
32 Correct 2 ms 1112 KB Output is correct
33 Correct 20 ms 1116 KB Output is correct
34 Correct 21 ms 1344 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1112 KB Output is correct
2 Correct 1 ms 1272 KB Output is correct
3 Correct 1 ms 1116 KB Output is correct
4 Correct 1 ms 1268 KB Output is correct
5 Correct 1 ms 1112 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1112 KB Output is correct
8 Correct 1 ms 1112 KB Output is correct
9 Correct 1 ms 1116 KB Output is correct
10 Correct 2 ms 1116 KB Output is correct
11 Correct 21 ms 1328 KB Output is correct
12 Correct 18 ms 1292 KB Output is correct
13 Correct 18 ms 1116 KB Output is correct
14 Correct 20 ms 1624 KB Output is correct
15 Correct 21 ms 1116 KB Output is correct
16 Correct 1 ms 1112 KB Output is correct
17 Correct 16 ms 1116 KB Output is correct
18 Correct 1 ms 1116 KB Output is correct
19 Correct 1 ms 1164 KB Output is correct
20 Correct 23 ms 1116 KB Output is correct
21 Correct 1 ms 1116 KB Output is correct
22 Correct 1 ms 1116 KB Output is correct
23 Correct 5 ms 1116 KB Output is correct
24 Correct 17 ms 1116 KB Output is correct
25 Correct 19 ms 1116 KB Output is correct
26 Correct 19 ms 1116 KB Output is correct
27 Correct 19 ms 1272 KB Output is correct
28 Correct 20 ms 1112 KB Output is correct
29 Correct 4 ms 1284 KB Output is correct
30 Correct 1 ms 1112 KB Output is correct
31 Correct 2 ms 1116 KB Output is correct
32 Correct 3 ms 1116 KB Output is correct
33 Correct 20 ms 1112 KB Output is correct
34 Correct 21 ms 1116 KB Output is correct
35 Correct 7 ms 1628 KB Output is correct
36 Correct 2 ms 1112 KB Output is correct
37 Correct 5 ms 1692 KB Output is correct
38 Correct 5 ms 1624 KB Output is correct
39 Correct 5 ms 1624 KB Output is correct
40 Correct 5 ms 1628 KB Output is correct
41 Correct 7 ms 1640 KB Output is correct
42 Correct 4 ms 1624 KB Output is correct
43 Correct 4 ms 1624 KB Output is correct
44 Correct 155 ms 1692 KB Output is correct
45 Correct 6 ms 1884 KB Output is correct
46 Correct 6 ms 1884 KB Output is correct

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1116 KB Output is correct
2 Correct 1 ms 1112 KB Output is correct
3 Correct 1 ms 1112 KB Output is correct
4 Correct 1 ms 1112 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1116 KB Output is correct
8 Correct 1 ms 1116 KB Output is correct
9 Correct 1 ms 1116 KB Output is correct
10 Correct 2 ms 1116 KB Output is correct
11 Correct 20 ms 1116 KB Output is correct
12 Correct 18 ms 1112 KB Output is correct
13 Correct 19 ms 1116 KB Output is correct
14 Correct 21 ms 1372 KB Output is correct
15 Correct 21 ms 1376 KB Output is correct
16 Correct 1 ms 1116 KB Output is correct
17 Correct 16 ms 1312 KB Output is correct
18 Correct 1 ms 1116 KB Output is correct
19 Correct 1 ms 1116 KB Output is correct
20 Correct 24 ms 1308 KB Output is correct
21 Correct 2 ms 1112 KB Output is correct
22 Correct 1 ms 1268 KB Output is correct
23 Correct 5 ms 1116 KB Output is correct
24 Correct 18 ms 1372 KB Output is correct
25 Correct 19 ms 1112 KB Output is correct
26 Correct 20 ms 1304 KB Output is correct
27 Correct 19 ms 1112 KB Output is correct
28 Correct 19 ms 1116 KB Output is correct
29 Correct 4 ms 1116 KB Output is correct
30 Correct 2 ms 1124 KB Output is correct
31 Correct 3 ms 1272 KB Output is correct
32 Correct 2 ms 1116 KB Output is correct
33 Correct 21 ms 1116 KB Output is correct
34 Correct 22 ms 1388 KB Output is correct
35 Correct 7 ms 1624 KB Output is correct
36 Correct 2 ms 1112 KB Output is correct
37 Correct 7 ms 1624 KB Output is correct
38 Correct 5 ms 1628 KB Output is correct
39 Correct 4 ms 1628 KB Output is correct
40 Correct 7 ms 1628 KB Output is correct
41 Correct 5 ms 1628 KB Output is correct
42 Correct 5 ms 1628 KB Output is correct
43 Correct 5 ms 1628 KB Output is correct
44 Correct 154 ms 1628 KB Output is correct
45 Correct 7 ms 1880 KB Output is correct
46 Correct 8 ms 1884 KB Output is correct
47 Incorrect 99 ms 33104 KB Output isn't correct
48 Halted 0 ms 0 KB -