Submission #134090

#	Time	Username	Problem	Language	Result	Execution time	Memory
134090		wilwxk	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	34.92 / 100	1088 ms	40184 KiB

brunhilda

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

const int MAXN=1e5+5;
const int MAXX=1e7+3;
const int INF=1e9;
int v[MAXN];
int dp[MAXX];
int n, q;

int main() {
	scanf("%d %d", &n, &q);
	for(int i=0; i<n; i++) scanf("%d", &v[i]);
	dp[0]=0;
	for(int i=1; i<v[n-1]; i++) dp[i]=1; 
	for(int i=v[n-1]; i<MAXX; i++) {
		dp[i]=INF;
		bool ok=0;
		for(int j=n-1; j>=max(0, n-23); j--) {
			if(i%v[j]==0) continue;
			int ind=i-(i%v[j]);
			dp[i]=min(dp[i], dp[ind]+1);
		}
	}

	// for(int i=0; i<MAXX; i++) printf("%d ", dp[i]);
	while(q--) {
		int a; scanf("%d", &a);
		if(dp[a]==-1||dp[a]>MAXN) printf("oo\n");
		else printf("%d\n", dp[a]);
	}

}

Compilation message (stderr)

brunhilda.cpp: In function 'int main()':
brunhilda.cpp:18:8: warning: unused variable 'ok' [-Wunused-variable]
   bool ok=0;
        ^~
brunhilda.cpp:12:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &q);
  ~~~~~^~~~~~~~~~~~~~~~~
brunhilda.cpp:13:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=0; i<n; i++) scanf("%d", &v[i]);
                         ~~~~~^~~~~~~~~~~~~
brunhilda.cpp:28:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int a; scanf("%d", &a);
          ~~~~~^~~~~~~~~~

• Subtask 1: 7.777777777777778 / 20
• Subtask 2: 10 / 20
• Subtask 3: 17.142857142857142 / 60