Submission #155756

#	Time	Username	Problem	Language	Result	Execution time	Memory
155756		Flying_dragon_02	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	100 / 100	517 ms	118392 KiB

brunhilda

#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second
#define pb push_back
#define mp make_pair

typedef pair<int, int> ii;

const int mod = 1e9 + 7;

const int inf = 1e9;

const int N = 1e7 + 5;

int dp[N], p[N];

int m, q, last, f[N];

int main() {
    scanf("%d%d", &m, &q);
    for(int i = 0; i < N; i++)
        p[i] = 0;
    for(int i = 1; i <= m; i++) {
        int x;
        scanf("%d", &x);
        for(int l = 0; l < N; l++) {
            if(x * l >= N) break;
            p[x * l] = max(p[x * l], x);
        }
    }
    for(int i = 0; i <= N - 5; i++) {
        if(i > last)
            break;
        if(i)
            f[i] += f[i - 1];
        dp[i] = f[i];
        if(i + p[i] - 1 >= last) {
            f[last + 1] += (dp[i] + 1);
            f[i + p[i]] -= (dp[i] + 1);
            last = max(last, i + p[i] - 1);
        }
    }
    for(int i = 1; i <= q; i++) {
        int x;
        scanf("%d", &x);
        if(dp[x] == 0)
            printf("oo\n");
        else
            printf("%d\n", dp[x]);
    }
}

Compilation message (stderr)

brunhilda.cpp: In function 'int main()':
brunhilda.cpp:23:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &m, &q);
     ~~~~~^~~~~~~~~~~~~~~~
brunhilda.cpp:28:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &x);
         ~~~~~^~~~~~~~~~
brunhilda.cpp:48:14: 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