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Submission #271759

# Submission time Handle Problem Language Result Execution time Memory
271759 2020-08-18T07:27:38 Z 반딧불(#5113) Archery (IOI09_archery) C++17
20 / 100
 2000 ms 3448 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

using namespace std;

typedef long long ll;

int n, k, val;
int arr[400005];
int ans, finish = 1e9;

int tryIfAble(){
    vector<int> v(arr+1, arr+2*n+1);
    int cnt = 2*n;
    while(cnt--){
        for(int i=0; i<n; i++){
            if(i==0 && v[i*2] > v[i*2+1]) swap(v[i*2], v[i*2+1]);
            else if(i && v[i*2] < v[i*2+1]) swap(v[i*2], v[i*2+1]);
        }
        int tmp = v[1];
        for(int i=0; i<n-1; i++) v[i*2+1] = v[i*2+3];
        v.back()=tmp;
    }

    int idx = -1;
    for(int i=0; i<2*n; i++) if(v[i] == val) idx = i;
    if(idx%2==0) return idx/2+1;
    idx /= 2, idx += (n-k), idx %= n, idx++;
    return idx;
}

int main(){
    scanf("%d %d %d", &n, &k, &val);
    k%=n;
    arr[1] = val;
    for(int i=2; i<=2*n; i++) scanf("%d", &arr[i]);

    for(int i=1; i<=2*n; i+=2){
        int tmp = tryIfAble();
        if(finish >= tmp) finish = tmp, ans = (i+1)/2;

        swap(arr[i], arr[i+1]);
        swap(arr[i+1], arr[i+2]);
    }
    printf("%d\n", ans);
}

Compilation message

archery.cpp: In function 'int main()':
archery.cpp:35:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   35 |     scanf("%d %d %d", &n, &k, &val);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
archery.cpp:38:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |     for(int i=2; i<=2*n; i++) scanf("%d", &arr[i]);
      |                               ~~~~~^~~~~~~~~~~~~~~

Subtask #1
4.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Execution timed out 2088 ms 384 KB Time limit exceeded
3 Correct 5 ms 256 KB Output is correct
4 Execution timed out 2043 ms 384 KB Time limit exceeded
5 Correct 1 ms 384 KB Output is correct
6 Correct 28 ms 256 KB Output is correct

Subtask #2
16.0 / 94.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 30 ms 376 KB Output is correct
3 Execution timed out 2081 ms 384 KB Time limit exceeded
4 Execution timed out 2079 ms 512 KB Time limit exceeded
5 Execution timed out 2085 ms 2936 KB Time limit exceeded
6 Correct 30 ms 256 KB Output is correct
7 Execution timed out 2056 ms 256 KB Time limit exceeded
8 Execution timed out 2058 ms 632 KB Time limit exceeded
9 Execution timed out 2083 ms 664 KB Time limit exceeded
10 Execution timed out 2090 ms 384 KB Time limit exceeded
11 Execution timed out 2077 ms 672 KB Time limit exceeded
12 Execution timed out 2092 ms 384 KB Time limit exceeded
13 Execution timed out 2080 ms 2296 KB Time limit exceeded
14 Execution timed out 2033 ms 384 KB Time limit exceeded
15 Execution timed out 2085 ms 768 KB Time limit exceeded
16 Correct 30 ms 376 KB Output is correct
17 Execution timed out 2067 ms 384 KB Time limit exceeded
18 Execution timed out 2083 ms 384 KB Time limit exceeded
19 Execution timed out 2085 ms 384 KB Time limit exceeded
20 Execution timed out 2097 ms 384 KB Time limit exceeded
21 Execution timed out 2078 ms 668 KB Time limit exceeded
22 Execution timed out 2083 ms 768 KB Time limit exceeded
23 Execution timed out 2090 ms 3064 KB Time limit exceeded
24 Correct 30 ms 256 KB Output is correct
25 Execution timed out 2079 ms 384 KB Time limit exceeded
26 Execution timed out 2097 ms 384 KB Time limit exceeded
27 Execution timed out 2013 ms 640 KB Time limit exceeded
28 Execution timed out 2065 ms 2256 KB Time limit exceeded
29 Execution timed out 2081 ms 384 KB Time limit exceeded
30 Execution timed out 2063 ms 384 KB Time limit exceeded
31 Execution timed out 2067 ms 656 KB Time limit exceeded
32 Execution timed out 2075 ms 2988 KB Time limit exceeded
33 Correct 31 ms 256 KB Output is correct
34 Correct 32 ms 376 KB Output is correct
35 Execution timed out 2083 ms 384 KB Time limit exceeded
36 Execution timed out 2083 ms 384 KB Time limit exceeded
37 Execution timed out 2089 ms 640 KB Time limit exceeded
38 Execution timed out 2043 ms 776 KB Time limit exceeded
39 Correct 27 ms 256 KB Output is correct
40 Execution timed out 2041 ms 256 KB Time limit exceeded
41 Execution timed out 2073 ms 384 KB Time limit exceeded
42 Execution timed out 2083 ms 384 KB Time limit exceeded
43 Execution timed out 2071 ms 384 KB Time limit exceeded
44 Execution timed out 2077 ms 520 KB Time limit exceeded
45 Execution timed out 2080 ms 640 KB Time limit exceeded
46 Execution timed out 2069 ms 680 KB Time limit exceeded
47 Execution timed out 2074 ms 3448 KB Time limit exceeded