Submission #588637

#	Time	Username	Problem	Language	Result	Execution time	Memory
588637		peuch	Uplifting Excursion (BOI22_vault)	C++17	0 / 100	0 ms	212 KiB

vault

#include<bits/stdc++.h>
using namespace std;

const int MAXN = 610;
const long long INF = 1e18;

int m;
long long l;

long long aux[MAXN];
long long *v = aux + 300;

int main(){
	
	scanf("%d %lld", &m, &l);
	for(int i = -m; i <= m; i++)
		scanf("%lld", &v[i]);
		
	long long sum = 0;
	long long cnt = 0;
	for(int i = 1; i <= m; i++){
		if(sum + v[i] * i <= l){
			sum += v[i] * i;
			cnt += v[i];
			continue;
		}
		cnt += ((l - sum) / i + 1);
		sum += i * ((l - sum) / i + 1);
	}
	if(sum < l){
		printf("impossible\n");
		return 0;
	}
	vector<long long> dp(sum - l + 1, INF);
	dp[0] = 0;
	vector<int> moedas;
	for(int i = 1; i <= m; i++){
		for(int j = 0; j < min(300LL, v[i]); j++)
			moedas.push_back(i);
	}
	
	for(int i = 0; i < moedas.size(); i++){
		for(int j = moedas[i]; j < dp.size(); j++){
			dp[j] = min(dp[j], dp[j - moedas[i]] + 1);
		}
	}
	
	if(dp.back() == INF) printf("impossible\n");
	else printf("%lld\n", v[0] + cnt - dp.back());
}

Compilation message (stderr)

vault.cpp: In function 'int main()':
vault.cpp:42:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |  for(int i = 0; i < moedas.size(); i++){
      |                 ~~^~~~~~~~~~~~~~~
vault.cpp:43:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |   for(int j = moedas[i]; j < dp.size(); j++){
      |                          ~~^~~~~~~~~~~
vault.cpp:15:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |  scanf("%d %lld", &m, &l);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
vault.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   scanf("%lld", &v[i]);
      |   ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3-1: 0 / 10
• Subtask 3-2: 0 / 10
• Subtask 4-1: 0 / 10
• Subtask 4-2: 0 / 10
• Subtask 5-1: 0 / 10
• Subtask 5-2: 0 / 10
• Subtask 6-1: 0 / 10
• Subtask 6-2: 0 / 10