oj.uz

답안 #111466

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
111466 2019-05-15T12:24:56 Z ecasdqina Fireworks (APIO16_fireworks) C++14
26 / 100
 46 ms 1116 KB 
#include <bits/stdc++.h>
using namespace std::literals::string_literals;
using i64 = long long;
using std::cout;
using std::endl;
using std::cin;

template<typename T>
std::vector<T> make_v(size_t a){return std::vector<T>(a);}

template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts){
  return std::vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}

int main() {
	int n, m; scanf("%d%d", &n, &m);
	std::vector<int> leaf(m);
	std::vector<std::vector<std::pair<int, i64>>> g(n + m); n += m;
	for(int i = 1; i < n; i++) {
		int a; i64 b; scanf("%d%lld", &a, &b);
		
	//	g[i].push_back({a - 1, b});
		g[a - 1].push_back({i, b});
	}
	
	std::vector<i64> dist(n, 0);
	std::function<void (int, int, i64)> dfs = [&](int v, int par, i64 ari) {
		dist[v] = ari;
		for(auto e: g[v]) {
			if(e.first == par) continue;
			dfs(e.first, v, ari + e.second);
		}
	};
	dfs(0, -1, 0);
	
	i64 ans = 1LL << 60;
	if(n - m == 1) {
		std::function<i64 (std::vector<i64>&)> OSNIKTR = [](std::vector<i64>& vec) {
			i64 X = 0, Y = 1LL << 60;
			std::vector<i64> s(vec.size() + 1, 0);
			for(int i = 0; i < vec.size(); i++) s[i + 1] = s[i] + vec[i];
			
			for(i64 i = 0; i < vec.size(); i++) {
				i64 tmp = 0;
				tmp += i * vec[i] - s[i];
				tmp += (s.back() - s[i]) - ((i64)vec.size() - i) * vec[i];
				if(tmp < Y) {
					Y = tmp;
					X = vec[i];
				}
			}
			
			return X;
		};
		sort(begin(dist), end(dist));
		dist.erase(begin(dist));
		i64 makino = OSNIKTR(dist);
		
		ans = 0;
		for(auto v: dist) ans += std::abs(v - makino);
	} else if(n <= 300) {
		auto dp = make_v<i64>(n, 301);
		for(int i = 0; i < dp.size(); i++) for(int j = 0; j < dp[i].size(); j++) dp[i][j] = 1LL << 60;
		std::function<void (int)> solve = [&](int v) {
			if(v > n - m - 1) {
				dp[v][0] = 0;
				return;
			}
			
			for(auto e: g[v]) solve(e.first);
			for(int i = 0; i < dp[v].size(); i++) {
				i64 tmp = 0;
				for(auto e: g[v]) {
					i64 mi = 1LL << 60;
					for(int j = 0; j < dp[e.first].size(); j++) {
						i64 diff = i - (j + e.second);
						if(e.second + diff < 0) continue;
						mi = std::min(mi, dp[e.first][j] + std::abs(diff));
					}
					tmp += mi;
				}
				dp[v][i] = tmp;
			}
		};
		solve(0);
		
		for(auto v: dp[0]) ans = std::min(ans, v);
	} else {
		assert(0);
	}
	
	printf("%lld\n", ans);
	return 0;
}

Compilation message

fireworks.cpp: In lambda function:
fireworks.cpp:42:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i = 0; i < vec.size(); i++) s[i + 1] = s[i] + vec[i];
                   ~~^~~~~~~~~~~~
fireworks.cpp:44:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(i64 i = 0; i < vec.size(); i++) {
                   ~~^~~~~~~~~~~~
fireworks.cpp: In function 'int main()':
fireworks.cpp:64:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < dp.size(); i++) for(int j = 0; j < dp[i].size(); j++) dp[i][j] = 1LL << 60;
                  ~~^~~~~~~~~~~
fireworks.cpp:64:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < dp.size(); i++) for(int j = 0; j < dp[i].size(); j++) dp[i][j] = 1LL << 60;
                                                     ~~^~~~~~~~~~~~~~
fireworks.cpp: In lambda function:
fireworks.cpp:72:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i = 0; i < dp[v].size(); i++) {
                   ~~^~~~~~~~~~~~~~
fireworks.cpp:76:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int j = 0; j < dp[e.first].size(); j++) {
                     ~~^~~~~~~~~~~~~~~~~~~~
fireworks.cpp: In function 'int main()':
fireworks.cpp:17:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  int n, m; scanf("%d%d", &n, &m);
            ~~~~~^~~~~~~~~~~~~~~~
fireworks.cpp:21:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int a; i64 b; scanf("%d%lld", &a, &b);
                 ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct

Subtask #2
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 460 KB Output is correct
2 Correct 6 ms 384 KB Output is correct
3 Correct 11 ms 384 KB Output is correct
4 Correct 20 ms 640 KB Output is correct
5 Correct 16 ms 640 KB Output is correct
6 Correct 15 ms 640 KB Output is correct
7 Correct 22 ms 780 KB Output is correct
8 Correct 30 ms 768 KB Output is correct
9 Correct 26 ms 888 KB Output is correct
10 Correct 27 ms 896 KB Output is correct
11 Correct 39 ms 896 KB Output is correct
12 Correct 37 ms 1024 KB Output is correct
13 Correct 33 ms 1024 KB Output is correct
14 Correct 41 ms 1100 KB Output is correct
15 Correct 41 ms 1024 KB Output is correct
16 Correct 46 ms 1072 KB Output is correct
17 Correct 40 ms 1024 KB Output is correct
18 Correct 32 ms 1116 KB Output is correct
19 Correct 31 ms 1024 KB Output is correct

Subtask #3
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 4 ms 460 KB Output is correct
12 Correct 6 ms 384 KB Output is correct
13 Correct 11 ms 384 KB Output is correct
14 Correct 20 ms 640 KB Output is correct
15 Correct 16 ms 640 KB Output is correct
16 Correct 15 ms 640 KB Output is correct
17 Correct 22 ms 780 KB Output is correct
18 Correct 30 ms 768 KB Output is correct
19 Correct 26 ms 888 KB Output is correct
20 Correct 27 ms 896 KB Output is correct
21 Correct 39 ms 896 KB Output is correct
22 Correct 37 ms 1024 KB Output is correct
23 Correct 33 ms 1024 KB Output is correct
24 Correct 41 ms 1100 KB Output is correct
25 Correct 41 ms 1024 KB Output is correct
26 Correct 46 ms 1072 KB Output is correct
27 Correct 40 ms 1024 KB Output is correct
28 Correct 32 ms 1116 KB Output is correct
29 Correct 31 ms 1024 KB Output is correct
30 Runtime error 3 ms 512 KB Execution killed with signal 11 (could be triggered by violating memory limits)
31 Halted 0 ms 0 KB -

Subtask #4
0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 4 ms 460 KB Output is correct
12 Correct 6 ms 384 KB Output is correct
13 Correct 11 ms 384 KB Output is correct
14 Correct 20 ms 640 KB Output is correct
15 Correct 16 ms 640 KB Output is correct
16 Correct 15 ms 640 KB Output is correct
17 Correct 22 ms 780 KB Output is correct
18 Correct 30 ms 768 KB Output is correct
19 Correct 26 ms 888 KB Output is correct
20 Correct 27 ms 896 KB Output is correct
21 Correct 39 ms 896 KB Output is correct
22 Correct 37 ms 1024 KB Output is correct
23 Correct 33 ms 1024 KB Output is correct
24 Correct 41 ms 1100 KB Output is correct
25 Correct 41 ms 1024 KB Output is correct
26 Correct 46 ms 1072 KB Output is correct
27 Correct 40 ms 1024 KB Output is correct
28 Correct 32 ms 1116 KB Output is correct
29 Correct 31 ms 1024 KB Output is correct
30 Runtime error 3 ms 512 KB Execution killed with signal 11 (could be triggered by violating memory limits)
31 Halted 0 ms 0 KB -