Submission #209935

#	Time	Username	Problem	Language	Result	Execution time	Memory
209935		dantoh000	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	100 / 100	332 ms	87800 KiB

brunhilda

#include <bits/stdc++.h>
using namespace std;
const int INF = 1000000007;
const int MAXN = 11000000;
int a[MAXN];
int ans[MAXN];
int main(){
    int n,q;
    scanf("%d%d",&n,&q);
    for (int i = 0; i < n; i++){
        int k;
        scanf("%d",&k);
        for (int j = k-1; j < MAXN; j+=k){
            a[j] = k-1;
        }
    }
    for (int i = MAXN-2; i >= 0; i--){
        a[i] = max(a[i],a[i+1]-1);
    }
    fill(ans,ans+MAXN,INF);
    ans[1] = 1;
    ans[0] = 0;
    for (int i = 2; i < MAXN; i++){
        if (a[i] == 0) ans[i] = INF;
        else ans[i] = min(ans[i],ans[i-a[i]]+1);
    }
    for (int i = 0; i < q; i++){
        int x;
        scanf("%d",&x);
        if (ans[x] == INF) printf("oo\n");
        else printf("%d\n",ans[x]);
    }
}

Compilation message (stderr)

brunhilda.cpp: In function 'int main()':
brunhilda.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&q);
     ~~~~~^~~~~~~~~~~~~~
brunhilda.cpp:12:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&k);
         ~~~~~^~~~~~~~~
brunhilda.cpp:29:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&x);
         ~~~~~^~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 60 / 60