답안 #801679

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
801679	2023-08-02T07:12:39 Z	반딧불(#10089)	IOI 바이러스 (JOI21_fever)	C++17	13 / 100	5000 ms	2688 KB

fever

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int n;
int x[100002], y[100002];

int dir[100002];

int cnt;
bool on[100002];
vector<pair<int, int> > link[100002];
int ans;

void backtrack(int s){
    if(s==n+1){
        cnt = 0;
        for(int i=1; i<=n; i++) on[i] = 0, link[i].clear();

        for(int i=1; i<=n; i++){
            for(int j=1; j<=n; j++){
                if(x[i] > x[j]) continue;
                if(x[i] + y[i] == x[j] + y[j] && (dir[i] ^ dir[j]) == 3){
                    if((dir[i] == 0 && dir[j] == 3) || (dir[i] == 1 || dir[j] == 2)){
                        link[i].push_back(make_pair(j, x[j]-x[i]));
                        link[j].push_back(make_pair(i, x[j]-x[i]));
                    }
                }
                if(x[i] - y[i] == x[j] - y[j] && (dir[i] ^ dir[j]) == 1){
                    if((dir[i] == 3 && dir[j] == 2) || (dir[i] == 0 || dir[j] == 1)){
                        link[i].push_back(make_pair(j, x[j]-x[i]));
                        link[j].push_back(make_pair(i, x[j]-x[i]));
                    }
                }
            }
        }

        priority_queue<pair<int, int>, vector<pair<int, int> > , greater<pair<int, int> > > pq;
        pq.push(make_pair(0, 1));
        while(!pq.empty()){
            int x = pq.top().second, t = pq.top().first; pq.pop();
            if(on[x]) continue;
            on[x] = 1, cnt++;
            for(pair<int, int> y: link[x]){
                if(y.second < t) continue;
                pq.push(make_pair(y.second, y.first));
            }
        }
        ans = max(ans, cnt);
        return;
    }
    for(int d=0; d<4; d++){
        if(x[s] > x[1] && d==0) continue;
        if(y[s] < y[1] && d==1) continue;
        if(x[s] < x[1] && d==2) continue;
        if(y[s] > y[1] && d==3) continue;
        dir[s] = d;
        backtrack(s+1);
    }
}

int main(){
    scanf("%d", &n);
    for(int i=1; i<=n; i++){
        scanf("%d %d", &x[i], &y[i]);
    }

    backtrack(1);

    printf("%d", ans);
}

Compilation message

fever.cpp: In function 'int main()':
fever.cpp:65:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
fever.cpp:67:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |         scanf("%d %d", &x[i], &y[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2644 KB	Output is correct
3	Correct	2 ms	2660 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	1 ms	2644 KB	Output is correct
6	Correct	1 ms	2644 KB	Output is correct
7	Correct	1 ms	2644 KB	Output is correct
8	Correct	1 ms	2644 KB	Output is correct
9	Correct	1 ms	2644 KB	Output is correct
10	Correct	1 ms	2644 KB	Output is correct
11	Correct	1 ms	2644 KB	Output is correct
12	Correct	1 ms	2644 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	1 ms	2644 KB	Output is correct
15	Correct	1 ms	2644 KB	Output is correct
16	Correct	2 ms	2644 KB	Output is correct
17	Correct	1 ms	2644 KB	Output is correct
18	Correct	2 ms	2644 KB	Output is correct
19	Correct	2 ms	2644 KB	Output is correct
20	Correct	2 ms	2644 KB	Output is correct
21	Correct	2 ms	2644 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	2 ms	2644 KB	Output is correct
24	Correct	1 ms	2644 KB	Output is correct
25	Correct	1 ms	2644 KB	Output is correct
26	Correct	2 ms	2644 KB	Output is correct
27	Correct	1 ms	2644 KB	Output is correct
28	Correct	1 ms	2644 KB	Output is correct
29	Correct	1 ms	2644 KB	Output is correct
30	Correct	1 ms	2644 KB	Output is correct
31	Correct	2 ms	2644 KB	Output is correct
32	Correct	2 ms	2644 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2644 KB	Output is correct
3	Correct	2 ms	2660 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	1 ms	2644 KB	Output is correct
6	Correct	1 ms	2644 KB	Output is correct
7	Correct	1 ms	2644 KB	Output is correct
8	Correct	1 ms	2644 KB	Output is correct
9	Correct	1 ms	2644 KB	Output is correct
10	Correct	1 ms	2644 KB	Output is correct
11	Correct	1 ms	2644 KB	Output is correct
12	Correct	1 ms	2644 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	1 ms	2644 KB	Output is correct
15	Correct	1 ms	2644 KB	Output is correct
16	Correct	2 ms	2644 KB	Output is correct
17	Correct	1 ms	2644 KB	Output is correct
18	Correct	2 ms	2644 KB	Output is correct
19	Correct	2 ms	2644 KB	Output is correct
20	Correct	2 ms	2644 KB	Output is correct
21	Correct	2 ms	2644 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	2 ms	2644 KB	Output is correct
24	Correct	1 ms	2644 KB	Output is correct
25	Correct	1 ms	2644 KB	Output is correct
26	Correct	2 ms	2644 KB	Output is correct
27	Correct	1 ms	2644 KB	Output is correct
28	Correct	1 ms	2644 KB	Output is correct
29	Correct	1 ms	2644 KB	Output is correct
30	Correct	1 ms	2644 KB	Output is correct
31	Correct	2 ms	2644 KB	Output is correct
32	Correct	2 ms	2644 KB	Output is correct
33	Correct	34 ms	2648 KB	Output is correct
34	Correct	38 ms	2648 KB	Output is correct
35	Correct	35 ms	2648 KB	Output is correct
36	Correct	31 ms	2644 KB	Output is correct
37	Correct	47 ms	2648 KB	Output is correct
38	Correct	133 ms	2652 KB	Output is correct
39	Correct	98 ms	2652 KB	Output is correct
40	Correct	37 ms	2644 KB	Output is correct
41	Correct	38 ms	2644 KB	Output is correct
42	Correct	38 ms	2644 KB	Output is correct
43	Correct	38 ms	2644 KB	Output is correct
44	Correct	47 ms	2688 KB	Output is correct
45	Correct	50 ms	2644 KB	Output is correct

Subtask #3
0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Execution timed out	5059 ms	2644 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

Subtask #4
0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2644 KB	Output is correct
3	Correct	2 ms	2660 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	1 ms	2644 KB	Output is correct
6	Correct	1 ms	2644 KB	Output is correct
7	Correct	1 ms	2644 KB	Output is correct
8	Correct	1 ms	2644 KB	Output is correct
9	Correct	1 ms	2644 KB	Output is correct
10	Correct	1 ms	2644 KB	Output is correct
11	Correct	1 ms	2644 KB	Output is correct
12	Correct	1 ms	2644 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	1 ms	2644 KB	Output is correct
15	Correct	1 ms	2644 KB	Output is correct
16	Correct	2 ms	2644 KB	Output is correct
17	Correct	1 ms	2644 KB	Output is correct
18	Correct	2 ms	2644 KB	Output is correct
19	Correct	2 ms	2644 KB	Output is correct
20	Correct	2 ms	2644 KB	Output is correct
21	Correct	2 ms	2644 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	2 ms	2644 KB	Output is correct
24	Correct	1 ms	2644 KB	Output is correct
25	Correct	1 ms	2644 KB	Output is correct
26	Correct	2 ms	2644 KB	Output is correct
27	Correct	1 ms	2644 KB	Output is correct
28	Correct	1 ms	2644 KB	Output is correct
29	Correct	1 ms	2644 KB	Output is correct
30	Correct	1 ms	2644 KB	Output is correct
31	Correct	2 ms	2644 KB	Output is correct
32	Correct	2 ms	2644 KB	Output is correct
33	Correct	34 ms	2648 KB	Output is correct
34	Correct	38 ms	2648 KB	Output is correct
35	Correct	35 ms	2648 KB	Output is correct
36	Correct	31 ms	2644 KB	Output is correct
37	Correct	47 ms	2648 KB	Output is correct
38	Correct	133 ms	2652 KB	Output is correct
39	Correct	98 ms	2652 KB	Output is correct
40	Correct	37 ms	2644 KB	Output is correct
41	Correct	38 ms	2644 KB	Output is correct
42	Correct	38 ms	2644 KB	Output is correct
43	Correct	38 ms	2644 KB	Output is correct
44	Correct	47 ms	2688 KB	Output is correct
45	Correct	50 ms	2644 KB	Output is correct
46	Execution timed out	5059 ms	2644 KB	Time limit exceeded
47	Halted	0 ms	0 KB	-

Subtask #5
0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2644 KB	Output is correct
3	Correct	2 ms	2660 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	1 ms	2644 KB	Output is correct
6	Correct	1 ms	2644 KB	Output is correct
7	Correct	1 ms	2644 KB	Output is correct
8	Correct	1 ms	2644 KB	Output is correct
9	Correct	1 ms	2644 KB	Output is correct
10	Correct	1 ms	2644 KB	Output is correct
11	Correct	1 ms	2644 KB	Output is correct
12	Correct	1 ms	2644 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	1 ms	2644 KB	Output is correct
15	Correct	1 ms	2644 KB	Output is correct
16	Correct	2 ms	2644 KB	Output is correct
17	Correct	1 ms	2644 KB	Output is correct
18	Correct	2 ms	2644 KB	Output is correct
19	Correct	2 ms	2644 KB	Output is correct
20	Correct	2 ms	2644 KB	Output is correct
21	Correct	2 ms	2644 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	2 ms	2644 KB	Output is correct
24	Correct	1 ms	2644 KB	Output is correct
25	Correct	1 ms	2644 KB	Output is correct
26	Correct	2 ms	2644 KB	Output is correct
27	Correct	1 ms	2644 KB	Output is correct
28	Correct	1 ms	2644 KB	Output is correct
29	Correct	1 ms	2644 KB	Output is correct
30	Correct	1 ms	2644 KB	Output is correct
31	Correct	2 ms	2644 KB	Output is correct
32	Correct	2 ms	2644 KB	Output is correct
33	Correct	34 ms	2648 KB	Output is correct
34	Correct	38 ms	2648 KB	Output is correct
35	Correct	35 ms	2648 KB	Output is correct
36	Correct	31 ms	2644 KB	Output is correct
37	Correct	47 ms	2648 KB	Output is correct
38	Correct	133 ms	2652 KB	Output is correct
39	Correct	98 ms	2652 KB	Output is correct
40	Correct	37 ms	2644 KB	Output is correct
41	Correct	38 ms	2644 KB	Output is correct
42	Correct	38 ms	2644 KB	Output is correct
43	Correct	38 ms	2644 KB	Output is correct
44	Correct	47 ms	2688 KB	Output is correct
45	Correct	50 ms	2644 KB	Output is correct
46	Execution timed out	5059 ms	2644 KB	Time limit exceeded
47	Halted	0 ms	0 KB	-

Subtask #6
0 / 32.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2644 KB	Output is correct
3	Correct	2 ms	2660 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	1 ms	2644 KB	Output is correct
6	Correct	1 ms	2644 KB	Output is correct
7	Correct	1 ms	2644 KB	Output is correct
8	Correct	1 ms	2644 KB	Output is correct
9	Correct	1 ms	2644 KB	Output is correct
10	Correct	1 ms	2644 KB	Output is correct
11	Correct	1 ms	2644 KB	Output is correct
12	Correct	1 ms	2644 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	1 ms	2644 KB	Output is correct
15	Correct	1 ms	2644 KB	Output is correct
16	Correct	2 ms	2644 KB	Output is correct
17	Correct	1 ms	2644 KB	Output is correct
18	Correct	2 ms	2644 KB	Output is correct
19	Correct	2 ms	2644 KB	Output is correct
20	Correct	2 ms	2644 KB	Output is correct
21	Correct	2 ms	2644 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	2 ms	2644 KB	Output is correct
24	Correct	1 ms	2644 KB	Output is correct
25	Correct	1 ms	2644 KB	Output is correct
26	Correct	2 ms	2644 KB	Output is correct
27	Correct	1 ms	2644 KB	Output is correct
28	Correct	1 ms	2644 KB	Output is correct
29	Correct	1 ms	2644 KB	Output is correct
30	Correct	1 ms	2644 KB	Output is correct
31	Correct	2 ms	2644 KB	Output is correct
32	Correct	2 ms	2644 KB	Output is correct
33	Correct	34 ms	2648 KB	Output is correct
34	Correct	38 ms	2648 KB	Output is correct
35	Correct	35 ms	2648 KB	Output is correct
36	Correct	31 ms	2644 KB	Output is correct
37	Correct	47 ms	2648 KB	Output is correct
38	Correct	133 ms	2652 KB	Output is correct
39	Correct	98 ms	2652 KB	Output is correct
40	Correct	37 ms	2644 KB	Output is correct
41	Correct	38 ms	2644 KB	Output is correct
42	Correct	38 ms	2644 KB	Output is correct
43	Correct	38 ms	2644 KB	Output is correct
44	Correct	47 ms	2688 KB	Output is correct
45	Correct	50 ms	2644 KB	Output is correct
46	Execution timed out	5059 ms	2644 KB	Time limit exceeded
47	Halted	0 ms	0 KB	-

Subtask #7
0 / 31.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	2 ms	2644 KB	Output is correct
3	Correct	2 ms	2660 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	1 ms	2644 KB	Output is correct
6	Correct	1 ms	2644 KB	Output is correct
7	Correct	1 ms	2644 KB	Output is correct
8	Correct	1 ms	2644 KB	Output is correct
9	Correct	1 ms	2644 KB	Output is correct
10	Correct	1 ms	2644 KB	Output is correct
11	Correct	1 ms	2644 KB	Output is correct
12	Correct	1 ms	2644 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	1 ms	2644 KB	Output is correct
15	Correct	1 ms	2644 KB	Output is correct
16	Correct	2 ms	2644 KB	Output is correct
17	Correct	1 ms	2644 KB	Output is correct
18	Correct	2 ms	2644 KB	Output is correct
19	Correct	2 ms	2644 KB	Output is correct
20	Correct	2 ms	2644 KB	Output is correct
21	Correct	2 ms	2644 KB	Output is correct
22	Correct	1 ms	2644 KB	Output is correct
23	Correct	2 ms	2644 KB	Output is correct
24	Correct	1 ms	2644 KB	Output is correct
25	Correct	1 ms	2644 KB	Output is correct
26	Correct	2 ms	2644 KB	Output is correct
27	Correct	1 ms	2644 KB	Output is correct
28	Correct	1 ms	2644 KB	Output is correct
29	Correct	1 ms	2644 KB	Output is correct
30	Correct	1 ms	2644 KB	Output is correct
31	Correct	2 ms	2644 KB	Output is correct
32	Correct	2 ms	2644 KB	Output is correct
33	Correct	34 ms	2648 KB	Output is correct
34	Correct	38 ms	2648 KB	Output is correct
35	Correct	35 ms	2648 KB	Output is correct
36	Correct	31 ms	2644 KB	Output is correct
37	Correct	47 ms	2648 KB	Output is correct
38	Correct	133 ms	2652 KB	Output is correct
39	Correct	98 ms	2652 KB	Output is correct
40	Correct	37 ms	2644 KB	Output is correct
41	Correct	38 ms	2644 KB	Output is correct
42	Correct	38 ms	2644 KB	Output is correct
43	Correct	38 ms	2644 KB	Output is correct
44	Correct	47 ms	2688 KB	Output is correct
45	Correct	50 ms	2644 KB	Output is correct
46	Execution timed out	5059 ms	2644 KB	Time limit exceeded
47	Halted	0 ms	0 KB	-

답안 #801679

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 8.0 / 8.0

Subtask #3 0 / 6.0

Subtask #4 0 / 6.0

Subtask #5 0 / 12.0

Subtask #6 0 / 32.0

Subtask #7 0 / 31.0

Subtask #1
5.0 / 5.0

Subtask #2
8.0 / 8.0

Subtask #3
0 / 6.0

Subtask #4
0 / 6.0

Subtask #5
0 / 12.0

Subtask #6
0 / 32.0

Subtask #7
0 / 31.0