Submission #45167

#	Time	Username	Problem	Language	Result	Execution time	Memory
45167		erdemkiraz	Fireworks (APIO16_fireworks)	C++11	19 / 100	31 ms	1020 KiB

fireworks

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair < int, int > ii;

const int N = 300 + 5;

int n, m;
vector < ii > v[N];
int dp[N][N], dp2[N];

int main() {

	scanf("%d %d", &n, &m);

	for(int i = 2; i <= n + m; i++) {
		int x, c;
		scanf("%d %d", &x, &c);
		v[x].push_back({i, c});
	}

	for(int i = n + 1; i <= n + m; i++) {
		for(int j = 1; j < N; j++)
			dp[i][j] = 1e9;
	}

	for(int x = n; x >= 1; x--) {
		for(auto u : v[x]) {
			for(int i = 0; i < N; i++)
				dp2[i] = 1e9;
			for(int i = 0; i < N; i++)
				for(int j = -u.second; i - j - u.second >= 0; j++)
					dp2[i] = min(dp2[i], dp[u.first][i - j - u.second] + abs(j));
			for(int i = 0; i < N; i++)
				dp[x][i] += dp2[i];
		}
	}

	int res = 1e9;

	for(int i = 0; i < N; i++) {
		res = min(res, dp[1][i]);
	}

	printf("%d\n", res);

    return 0;

}

Compilation message (stderr)

fireworks.cpp: In function 'int main()':
fireworks.cpp:16:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
fireworks.cpp:20:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &x, &c);
   ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 19 / 19
• Subtask 3: 0 / 29
• Subtask 4: 0 / 45