답안 #581728

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
581728	2022-06-23T05:11:54 Z	반딧불(#8365)	Sparklers (JOI17_sparklers)	C++17	50 / 100	147 ms	34508 KB

sparklers

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int n, k;
ll t;
ll arr[100002];
pair<ll, ll> DP[1002][1002];

ll able(ll speed){
    speed*=t;
    for(int i=1; i<=n; i++) for(int j=i; j<=n; j++) DP[i][j].first=1e18, DP[i][j].second=-1e18;
    DP[k][k] = make_pair(arr[k], arr[k]);
    for(int d=1; d<n; d++){
        for(int i=1; i+d<=n; i++){
            int j = i+d;
            if((arr[j]-speed*d) <= (DP[i][j-1].second+speed)){
                DP[i][j].first = min(DP[i][j].first, max(arr[j]-speed*d, DP[i][j-1].first-speed));
                DP[i][j].second = max(DP[i][j].second, DP[i][j-1].second+speed);
            }
            if((arr[i]+speed*d) >= (DP[i+1][j].first-speed)){
                DP[i][j].first = min(DP[i][j].first, DP[i+1][j].first-speed);
                DP[i][j].second = max(DP[i][j].second, min(arr[i]+speed*d, DP[i+1][j].second+speed));
            }
        }
    }
    return DP[1][n].first <= DP[1][n].second;
}

int main(){
    scanf("%d %d %lld", &n, &k, &t);
    for(int i=1; i<=n; i++) scanf("%lld", &arr[i]);
    if(arr[1] == arr[n]){
        puts("0");
        return 0;
    }

    ll L = 1, R = 1e9, ANS = 1e9;
    while(L<=R){
        ll MID = (L+R)/2;
        if(able(MID)) ANS = MID, R = MID-1;
        else L = MID+1;
    }
    printf("%lld", ANS);
}

Compilation message

sparklers.cpp: In function 'int main()':
sparklers.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     scanf("%d %d %lld", &n, &k, &t);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
sparklers.cpp:34:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |     for(int i=1; i<=n; i++) scanf("%lld", &arr[i]);
      |                             ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	1 ms	212 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	1 ms	340 KB	Output is correct
8	Correct	1 ms	308 KB	Output is correct
9	Correct	1 ms	308 KB	Output is correct
10	Correct	1 ms	316 KB	Output is correct
11	Correct	1 ms	340 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct
13	Correct	1 ms	312 KB	Output is correct
14	Correct	1 ms	308 KB	Output is correct
15	Correct	1 ms	312 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	312 KB	Output is correct
18	Correct	1 ms	308 KB	Output is correct
19	Correct	0 ms	212 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct
21	Correct	0 ms	212 KB	Output is correct

Subtask #2
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	1 ms	212 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	1 ms	340 KB	Output is correct
8	Correct	1 ms	308 KB	Output is correct
9	Correct	1 ms	308 KB	Output is correct
10	Correct	1 ms	316 KB	Output is correct
11	Correct	1 ms	340 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct
13	Correct	1 ms	312 KB	Output is correct
14	Correct	1 ms	308 KB	Output is correct
15	Correct	1 ms	312 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	312 KB	Output is correct
18	Correct	1 ms	308 KB	Output is correct
19	Correct	0 ms	212 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct
21	Correct	0 ms	212 KB	Output is correct
22	Correct	57 ms	7444 KB	Output is correct
23	Correct	31 ms	5116 KB	Output is correct
24	Correct	52 ms	7384 KB	Output is correct
25	Correct	90 ms	11604 KB	Output is correct
26	Correct	102 ms	11656 KB	Output is correct
27	Correct	94 ms	11604 KB	Output is correct
28	Correct	129 ms	11648 KB	Output is correct
29	Correct	118 ms	11656 KB	Output is correct
30	Correct	102 ms	11620 KB	Output is correct
31	Correct	117 ms	11664 KB	Output is correct
32	Correct	101 ms	11664 KB	Output is correct
33	Correct	133 ms	11664 KB	Output is correct
34	Correct	107 ms	11664 KB	Output is correct
35	Correct	121 ms	11668 KB	Output is correct
36	Correct	88 ms	11664 KB	Output is correct
37	Correct	89 ms	11620 KB	Output is correct
38	Correct	147 ms	11664 KB	Output is correct
39	Correct	118 ms	11652 KB	Output is correct
40	Correct	0 ms	212 KB	Output is correct

Subtask #3
0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	1 ms	212 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	1 ms	340 KB	Output is correct
8	Correct	1 ms	308 KB	Output is correct
9	Correct	1 ms	308 KB	Output is correct
10	Correct	1 ms	316 KB	Output is correct
11	Correct	1 ms	340 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct
13	Correct	1 ms	312 KB	Output is correct
14	Correct	1 ms	308 KB	Output is correct
15	Correct	1 ms	312 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	312 KB	Output is correct
18	Correct	1 ms	308 KB	Output is correct
19	Correct	0 ms	212 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct
21	Correct	0 ms	212 KB	Output is correct
22	Correct	57 ms	7444 KB	Output is correct
23	Correct	31 ms	5116 KB	Output is correct
24	Correct	52 ms	7384 KB	Output is correct
25	Correct	90 ms	11604 KB	Output is correct
26	Correct	102 ms	11656 KB	Output is correct
27	Correct	94 ms	11604 KB	Output is correct
28	Correct	129 ms	11648 KB	Output is correct
29	Correct	118 ms	11656 KB	Output is correct
30	Correct	102 ms	11620 KB	Output is correct
31	Correct	117 ms	11664 KB	Output is correct
32	Correct	101 ms	11664 KB	Output is correct
33	Correct	133 ms	11664 KB	Output is correct
34	Correct	107 ms	11664 KB	Output is correct
35	Correct	121 ms	11668 KB	Output is correct
36	Correct	88 ms	11664 KB	Output is correct
37	Correct	89 ms	11620 KB	Output is correct
38	Correct	147 ms	11664 KB	Output is correct
39	Correct	118 ms	11652 KB	Output is correct
40	Correct	0 ms	212 KB	Output is correct
41	Runtime error	78 ms	34508 KB	Execution killed with signal 11
42	Halted	0 ms	0 KB	-

답안 #581728

Compilation message

Subtask #1 30.0 / 30.0

Subtask #2 20.0 / 20.0

Subtask #3 0 / 50.0

Subtask #1
30.0 / 30.0

Subtask #2
20.0 / 20.0

Subtask #3
0 / 50.0