Submission #420747

#	Time	Username	Problem	Language	Result	Execution time	Memory
420747		qwerasdfzxcl	Asceticism (JOI18_asceticism)	C++14	4 / 100	1085 ms	284 KiB

asceticism

#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
vector<int> v;

int main(){
    int n, k;
    scanf("%d %d", &n, &k);
    for (int i=1;i<=n;i++) v.push_back(i);
    ll fact = 1, ans = 0;
    for (int i=1;i<=n;i++) fact *= i;
    for (int i=0;i<fact;i++){
        int cnt = 0;
        for (int j=1;j<n;j++) if (v[j]<v[j-1]) cnt++;
        if (cnt+1==k) ans++;
        next_permutation(v.begin(), v.end());
    }
    printf("%lld\n", ans);
    return 0;
}

Compilation message (stderr)

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

• Subtask 1: 4 / 4
• Subtask 2: 0 / 20
• Subtask 3: 0 / 25
• Subtask 4: 0 / 51