oj.uz

답안 #59980

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
59980 2018-07-23T11:54:47 Z baekjoon 공장 (KOI13_factory) C++14
20 / 20
 451 ms 8496 KB 
#include <cstdio>
#include <vector>
#include <algorithm>
using namespace std;
int l;
void update(vector<int> &a, int i, int diff) {
    while (i <= l) {
        a[i] += diff;
        i += (i & -i);
    }
}
int sum(vector<int> &a, int i) {
    int ans = 0;
    while (i > 0) {
        ans += a[i];
        i -= (i & -i);
    }
    return ans;
}
int sum(vector<int> &a, int l, int r) {
    if (l > r) return 0;
    return sum(a, r) - sum(a, l-1);
}
int d[1000001];
int main() {
    int n;
    scanf("%d",&n);
    vector<int> a(n);
    for (int i=0; i<n; i++) {
        scanf("%d",&a[i]);
    }
    for (int i=0; i<n; i++) {
        int num;
        scanf("%d",&num);
        d[num] = i+1;
    }
    long long ans = 0;
    vector<int> tree(n+1);
    l = n;
    for (int i=0; i<n; i++) {
        ans += (long long)sum(tree, d[a[i]]+1, n);
        update(tree, d[a[i]], 1);
    }
    printf("%lld\n",ans);
    return 0;
}

Compilation message

factory.cpp: In function 'int main()':
factory.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
factory.cpp:30:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
         ~~~~~^~~~~~~~~~~~
factory.cpp:34:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&num);
         ~~~~~^~~~~~~~~~~

Subtask #1
2.2 / 2.2

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 248 KB Output is correct
2 Correct 3 ms 516 KB Output is correct
3 Correct 3 ms 564 KB Output is correct
4 Correct 4 ms 1616 KB Output is correct
5 Correct 4 ms 2052 KB Output is correct

Subtask #2
3.4 / 3.4

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 2908 KB Output is correct
2 Correct 9 ms 4380 KB Output is correct
3 Correct 15 ms 4428 KB Output is correct

Subtask #3
3.8 / 3.8

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 4740 KB Output is correct
2 Correct 46 ms 4972 KB Output is correct
3 Correct 65 ms 4972 KB Output is correct

Subtask #4
4.8 / 4.8

# 결과 실행 시간 메모리 Grader output
1 Correct 89 ms 5356 KB Output is correct
2 Correct 135 ms 5776 KB Output is correct
3 Correct 180 ms 6000 KB Output is correct
4 Correct 228 ms 6792 KB Output is correct

Subtask #5
5.8 / 5.8

# 결과 실행 시간 메모리 Grader output
1 Correct 313 ms 7648 KB Output is correct
2 Correct 451 ms 8456 KB Output is correct
3 Correct 341 ms 8496 KB Output is correct
4 Correct 393 ms 8496 KB Output is correct
5 Correct 365 ms 8496 KB Output is correct
6 Correct 354 ms 8496 KB Output is correct