Submission #113110

#	Time	Username	Problem	Language	Result	Execution time	Memory
113110		Bruteforceman	Long Distance Coach (JOI17_coach)	C++11	71 / 100	2032 ms	15328 KiB

coach

#include "bits/stdc++.h"
using namespace std;
long long s[200010];
long long d[200010];
long long c[200010];
int N, M;
long long X, W, T;
typedef pair <long long, int> pii;
vector <pii> v;
long long dp[200010];

long long p[200010];
int cnt[200010];

int main(int argc, char const *argv[])
{
	scanf("%lld %d %d %lld %lld", &X, &N, &M, &W, &T);
	for(int i = 1; i <= N; i++) {
		scanf("%lld", &s[i]);
	}
	s[++N] = X;
	for(int i = 1; i <= N; i++) {
		v.push_back(pii(s[i] % T, i));
	}  
	for(int i = 1; i <= M; i++) {
		scanf("%lld %lld", &d[i], &c[i]);
		v.push_back(pii(d[i], -i));
	}
	sort(v.begin(), v.end());

	long long ans = (X / T) + 1;
	for(int i = 1; i <= M; i++) {
		ans += 1 + ((X - d[i]) / T);
	}
	ans *= W;
	int sz = N + M;
	v.insert(v.begin(), pii(0, 0));


	for(int i = 1; i <= sz; i++) {
		if(v[i].second < 0) {
			int id = -v[i].second;
			p[i] = c[id] - W * (1 + ((X - d[id]) / T));
			cnt[i] = 1;
		}
		p[i] += p[i - 1];
		cnt[i] += cnt[i - 1];
	}

	dp[0] = 0;
	for(int i = 1; i <= sz; i++) {
		if(v[i].second < 0) {
			dp[i] = dp[i - 1];
		} else {
			long long var = W * (s[v[i].second] / T);
			long long cost = 0;
			for(int cur = i; cur >= 1; cur--) {
				long long m = -cnt[cur - 1];
				long long c = dp[cur - 1] - p[cur - 1];
				long long add = p[i] + var * cnt[i];
				dp[i] = min(dp[i], m * var + c + add);
			}
		}
	}
	ans += dp[sz];
	printf("%lld\n", ans);
	return 0;
}

Compilation message (stderr)

coach.cpp: In function 'int main(int, const char**)':
coach.cpp:56:14: warning: unused variable 'cost' [-Wunused-variable]
    long long cost = 0;
              ^~~~
coach.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld %d %d %lld %lld", &X, &N, &M, &W, &T);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
coach.cpp:19:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", &s[i]);
   ~~~~~^~~~~~~~~~~~~~~
coach.cpp:26:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld %lld", &d[i], &c[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 16 / 16
• Subtask 2: 30 / 30
• Subtask 3: 25 / 25
• Subtask 4: 0 / 29