oj.uz

Submission #853146

# Submission time Handle Problem Language Result Execution time Memory
853146 2023-09-23T13:30:21 Z qin Shortcut (IOI16_shortcut) C++17
0 / 100
 1 ms 600 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define ssize(x) int(x.size())
#define pn printf("\n");
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<int, ll> pil;
typedef pair<ll, int> pli;
typedef pair<ll, ll> pll;
int inf = 1e09; ll infll = 1e18;
struct gr{
		vector<vector<pil>> g;
		vector<ll> dist;
		void init(int n){ g.resize(n), dist.resize(n); }
		void prepare(){ fill(dist.begin(), dist.end(), infll); }
		void dfs(int x, ll d){
				dist[x] = d;
				for(pil u : g[x]) if(d+u.se < dist[u.fi]) dfs(u.fi, d+u.se);
		}
} gr;
ll find_diam(int n, int a, int b, int c){
		gr.g[a].emplace_back(b, c), gr.g[b].emplace_back(a, c);
		ll tmp_res = 0;
		for(int u = 0; u < n<<1; ++u){
				gr.prepare(); gr.dfs(u, 0);
				ll d = -1;
				for(int i = 0; i < n<<1; ++i) if(gr.dist[i] != infll && d < gr.dist[i]) d = gr.dist[i];
				tmp_res = max(tmp_res, d);
		}
		gr.g[a].pop_back(), gr.g[b].pop_back();
		return tmp_res;
}
ll find_shortcut(int n, vector<int> d_main, vector<int> d_sec, int C){
		gr.init(n<<1);
		for(int i = 0; i < n-1; ++i) gr.g[i].emplace_back(i+1, d_main[i]), gr.g[i+1].emplace_back(i, d_main[i]);
		for(int i = 0; i < n; ++i) gr.g[i].emplace_back(i+n, d_sec[i]), gr.g[i+n].emplace_back(i, d_sec[i]);
		ll result = infll;
		vector<int> candidates;
		for(int p = 0; p < n-1; ++p){
				int l = p+1, r = n-1;
				//printf("%d:\n", p);
				while(r-l >= 4){
						//printf("%d %d: ", l, r);
						int a = l+(r-l)/4, b = l+2*(r-l)/4, c = l+3*(r-l)/4;
						ll res_a = find_diam(n, p, a, C), res_b = find_diam(n, p, b, C), res_c = find_diam(n, p, c, C);
						//printf("%d %d %d, %lld %lld %lld\n", a, b, c, res_a, res_b, res_c);
						if(res_a < res_b && res_b <= res_c) r = c;
						else if(res_a < res_b && res_b < res_c) r = b;
						else if(res_a <= res_b && res_b < res_c) r = c;
						else if(res_a > res_b && res_b >= res_c) l = a;
						else if(res_a > res_b && res_b > res_c) l = b;
						else if(res_a >= res_b && res_b > res_c) l = a;
						else{
								res_a = find_diam(n, p, l+1, C), res_b = find_diam(n, p, r-1, C);
								if(res_a < res_b) r = a;
								else if(res_a > res_b) l = c;
								else ++l;
						}
				} //printf("%d %d\n", l, r);
				for(int i = l; i <= r; ++i) result = min(result, find_diam(n, p, i, C));
		}
				
		return result;
}
#ifdef LOCAL
int main(){
		int n, c; scanf("%d%d", &n, &c);
		vector<int> d_main(n), d_sec(n);
		for(int i = 0; i < n-1; ++i) scanf("%d", &d_main[i]);
		for(int i = 0; i < n; ++i) scanf("%d", &d_sec[i]);
		ll result = find_shortcut(n, d_main, d_sec, c);
		printf("%lld\n", result);
		return 0;
}
#endif

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n = 4, 80 is a correct answer
2 Correct 1 ms 344 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 348 KB n = 2, 62 is a correct answer
6 Correct 0 ms 344 KB n = 2, 3 is a correct answer
7 Correct 0 ms 344 KB n = 3, 29 is a correct answer
8 Correct 1 ms 344 KB n = 2, 3 is a correct answer
9 Correct 0 ms 348 KB n = 2, 3 is a correct answer
10 Correct 1 ms 600 KB n = 2, 2000000001 is a correct answer
11 Correct 1 ms 344 KB n = 2, 3000000000 is a correct answer
12 Correct 0 ms 344 KB n = 3, 3000000000 is a correct answer
13 Correct 1 ms 600 KB n = 3, 3000000000 is a correct answer
14 Correct 0 ms 344 KB n = 4, 3000000001 is a correct answer
15 Correct 0 ms 344 KB n = 4, 4000000000 is a correct answer
16 Correct 0 ms 348 KB n = 5, 4000000000 is a correct answer
17 Correct 1 ms 348 KB n = 10, 1000000343 is a correct answer
18 Correct 1 ms 344 KB n = 10, 3189 is a correct answer
19 Correct 1 ms 600 KB n = 10, 7000000000 is a correct answer
20 Correct 0 ms 344 KB n = 5, 12 is a correct answer
21 Correct 1 ms 348 KB n = 5, 25 is a correct answer
22 Correct 0 ms 344 KB n = 2, 122 is a correct answer
23 Correct 1 ms 344 KB n = 10, 117 is a correct answer
24 Incorrect 1 ms 344 KB n = 10, incorrect answer: jury 336 vs contestant 338
25 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n = 4, 80 is a correct answer
2 Correct 1 ms 344 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 348 KB n = 2, 62 is a correct answer
6 Correct 0 ms 344 KB n = 2, 3 is a correct answer
7 Correct 0 ms 344 KB n = 3, 29 is a correct answer
8 Correct 1 ms 344 KB n = 2, 3 is a correct answer
9 Correct 0 ms 348 KB n = 2, 3 is a correct answer
10 Correct 1 ms 600 KB n = 2, 2000000001 is a correct answer
11 Correct 1 ms 344 KB n = 2, 3000000000 is a correct answer
12 Correct 0 ms 344 KB n = 3, 3000000000 is a correct answer
13 Correct 1 ms 600 KB n = 3, 3000000000 is a correct answer
14 Correct 0 ms 344 KB n = 4, 3000000001 is a correct answer
15 Correct 0 ms 344 KB n = 4, 4000000000 is a correct answer
16 Correct 0 ms 348 KB n = 5, 4000000000 is a correct answer
17 Correct 1 ms 348 KB n = 10, 1000000343 is a correct answer
18 Correct 1 ms 344 KB n = 10, 3189 is a correct answer
19 Correct 1 ms 600 KB n = 10, 7000000000 is a correct answer
20 Correct 0 ms 344 KB n = 5, 12 is a correct answer
21 Correct 1 ms 348 KB n = 5, 25 is a correct answer
22 Correct 0 ms 344 KB n = 2, 122 is a correct answer
23 Correct 1 ms 344 KB n = 10, 117 is a correct answer
24 Incorrect 1 ms 344 KB n = 10, incorrect answer: jury 336 vs contestant 338
25 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n = 4, 80 is a correct answer
2 Correct 1 ms 344 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 348 KB n = 2, 62 is a correct answer
6 Correct 0 ms 344 KB n = 2, 3 is a correct answer
7 Correct 0 ms 344 KB n = 3, 29 is a correct answer
8 Correct 1 ms 344 KB n = 2, 3 is a correct answer
9 Correct 0 ms 348 KB n = 2, 3 is a correct answer
10 Correct 1 ms 600 KB n = 2, 2000000001 is a correct answer
11 Correct 1 ms 344 KB n = 2, 3000000000 is a correct answer
12 Correct 0 ms 344 KB n = 3, 3000000000 is a correct answer
13 Correct 1 ms 600 KB n = 3, 3000000000 is a correct answer
14 Correct 0 ms 344 KB n = 4, 3000000001 is a correct answer
15 Correct 0 ms 344 KB n = 4, 4000000000 is a correct answer
16 Correct 0 ms 348 KB n = 5, 4000000000 is a correct answer
17 Correct 1 ms 348 KB n = 10, 1000000343 is a correct answer
18 Correct 1 ms 344 KB n = 10, 3189 is a correct answer
19 Correct 1 ms 600 KB n = 10, 7000000000 is a correct answer
20 Correct 0 ms 344 KB n = 5, 12 is a correct answer
21 Correct 1 ms 348 KB n = 5, 25 is a correct answer
22 Correct 0 ms 344 KB n = 2, 122 is a correct answer
23 Correct 1 ms 344 KB n = 10, 117 is a correct answer
24 Incorrect 1 ms 344 KB n = 10, incorrect answer: jury 336 vs contestant 338
25 Halted 0 ms 0 KB -

Subtask #4
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n = 4, 80 is a correct answer
2 Correct 1 ms 344 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 348 KB n = 2, 62 is a correct answer
6 Correct 0 ms 344 KB n = 2, 3 is a correct answer
7 Correct 0 ms 344 KB n = 3, 29 is a correct answer
8 Correct 1 ms 344 KB n = 2, 3 is a correct answer
9 Correct 0 ms 348 KB n = 2, 3 is a correct answer
10 Correct 1 ms 600 KB n = 2, 2000000001 is a correct answer
11 Correct 1 ms 344 KB n = 2, 3000000000 is a correct answer
12 Correct 0 ms 344 KB n = 3, 3000000000 is a correct answer
13 Correct 1 ms 600 KB n = 3, 3000000000 is a correct answer
14 Correct 0 ms 344 KB n = 4, 3000000001 is a correct answer
15 Correct 0 ms 344 KB n = 4, 4000000000 is a correct answer
16 Correct 0 ms 348 KB n = 5, 4000000000 is a correct answer
17 Correct 1 ms 348 KB n = 10, 1000000343 is a correct answer
18 Correct 1 ms 344 KB n = 10, 3189 is a correct answer
19 Correct 1 ms 600 KB n = 10, 7000000000 is a correct answer
20 Correct 0 ms 344 KB n = 5, 12 is a correct answer
21 Correct 1 ms 348 KB n = 5, 25 is a correct answer
22 Correct 0 ms 344 KB n = 2, 122 is a correct answer
23 Correct 1 ms 344 KB n = 10, 117 is a correct answer
24 Incorrect 1 ms 344 KB n = 10, incorrect answer: jury 336 vs contestant 338
25 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n = 4, 80 is a correct answer
2 Correct 1 ms 344 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 348 KB n = 2, 62 is a correct answer
6 Correct 0 ms 344 KB n = 2, 3 is a correct answer
7 Correct 0 ms 344 KB n = 3, 29 is a correct answer
8 Correct 1 ms 344 KB n = 2, 3 is a correct answer
9 Correct 0 ms 348 KB n = 2, 3 is a correct answer
10 Correct 1 ms 600 KB n = 2, 2000000001 is a correct answer
11 Correct 1 ms 344 KB n = 2, 3000000000 is a correct answer
12 Correct 0 ms 344 KB n = 3, 3000000000 is a correct answer
13 Correct 1 ms 600 KB n = 3, 3000000000 is a correct answer
14 Correct 0 ms 344 KB n = 4, 3000000001 is a correct answer
15 Correct 0 ms 344 KB n = 4, 4000000000 is a correct answer
16 Correct 0 ms 348 KB n = 5, 4000000000 is a correct answer
17 Correct 1 ms 348 KB n = 10, 1000000343 is a correct answer
18 Correct 1 ms 344 KB n = 10, 3189 is a correct answer
19 Correct 1 ms 600 KB n = 10, 7000000000 is a correct answer
20 Correct 0 ms 344 KB n = 5, 12 is a correct answer
21 Correct 1 ms 348 KB n = 5, 25 is a correct answer
22 Correct 0 ms 344 KB n = 2, 122 is a correct answer
23 Correct 1 ms 344 KB n = 10, 117 is a correct answer
24 Incorrect 1 ms 344 KB n = 10, incorrect answer: jury 336 vs contestant 338
25 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n = 4, 80 is a correct answer
2 Correct 1 ms 344 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 348 KB n = 2, 62 is a correct answer
6 Correct 0 ms 344 KB n = 2, 3 is a correct answer
7 Correct 0 ms 344 KB n = 3, 29 is a correct answer
8 Correct 1 ms 344 KB n = 2, 3 is a correct answer
9 Correct 0 ms 348 KB n = 2, 3 is a correct answer
10 Correct 1 ms 600 KB n = 2, 2000000001 is a correct answer
11 Correct 1 ms 344 KB n = 2, 3000000000 is a correct answer
12 Correct 0 ms 344 KB n = 3, 3000000000 is a correct answer
13 Correct 1 ms 600 KB n = 3, 3000000000 is a correct answer
14 Correct 0 ms 344 KB n = 4, 3000000001 is a correct answer
15 Correct 0 ms 344 KB n = 4, 4000000000 is a correct answer
16 Correct 0 ms 348 KB n = 5, 4000000000 is a correct answer
17 Correct 1 ms 348 KB n = 10, 1000000343 is a correct answer
18 Correct 1 ms 344 KB n = 10, 3189 is a correct answer
19 Correct 1 ms 600 KB n = 10, 7000000000 is a correct answer
20 Correct 0 ms 344 KB n = 5, 12 is a correct answer
21 Correct 1 ms 348 KB n = 5, 25 is a correct answer
22 Correct 0 ms 344 KB n = 2, 122 is a correct answer
23 Correct 1 ms 344 KB n = 10, 117 is a correct answer
24 Incorrect 1 ms 344 KB n = 10, incorrect answer: jury 336 vs contestant 338
25 Halted 0 ms 0 KB -

Subtask #7
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n = 4, 80 is a correct answer
2 Correct 1 ms 344 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 348 KB n = 2, 62 is a correct answer
6 Correct 0 ms 344 KB n = 2, 3 is a correct answer
7 Correct 0 ms 344 KB n = 3, 29 is a correct answer
8 Correct 1 ms 344 KB n = 2, 3 is a correct answer
9 Correct 0 ms 348 KB n = 2, 3 is a correct answer
10 Correct 1 ms 600 KB n = 2, 2000000001 is a correct answer
11 Correct 1 ms 344 KB n = 2, 3000000000 is a correct answer
12 Correct 0 ms 344 KB n = 3, 3000000000 is a correct answer
13 Correct 1 ms 600 KB n = 3, 3000000000 is a correct answer
14 Correct 0 ms 344 KB n = 4, 3000000001 is a correct answer
15 Correct 0 ms 344 KB n = 4, 4000000000 is a correct answer
16 Correct 0 ms 348 KB n = 5, 4000000000 is a correct answer
17 Correct 1 ms 348 KB n = 10, 1000000343 is a correct answer
18 Correct 1 ms 344 KB n = 10, 3189 is a correct answer
19 Correct 1 ms 600 KB n = 10, 7000000000 is a correct answer
20 Correct 0 ms 344 KB n = 5, 12 is a correct answer
21 Correct 1 ms 348 KB n = 5, 25 is a correct answer
22 Correct 0 ms 344 KB n = 2, 122 is a correct answer
23 Correct 1 ms 344 KB n = 10, 117 is a correct answer
24 Incorrect 1 ms 344 KB n = 10, incorrect answer: jury 336 vs contestant 338
25 Halted 0 ms 0 KB -

Subtask #8
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n = 4, 80 is a correct answer
2 Correct 1 ms 344 KB n = 9, 110 is a correct answer
3 Correct 0 ms 348 KB n = 4, 21 is a correct answer
4 Correct 0 ms 348 KB n = 3, 4 is a correct answer
5 Correct 0 ms 348 KB n = 2, 62 is a correct answer
6 Correct 0 ms 344 KB n = 2, 3 is a correct answer
7 Correct 0 ms 344 KB n = 3, 29 is a correct answer
8 Correct 1 ms 344 KB n = 2, 3 is a correct answer
9 Correct 0 ms 348 KB n = 2, 3 is a correct answer
10 Correct 1 ms 600 KB n = 2, 2000000001 is a correct answer
11 Correct 1 ms 344 KB n = 2, 3000000000 is a correct answer
12 Correct 0 ms 344 KB n = 3, 3000000000 is a correct answer
13 Correct 1 ms 600 KB n = 3, 3000000000 is a correct answer
14 Correct 0 ms 344 KB n = 4, 3000000001 is a correct answer
15 Correct 0 ms 344 KB n = 4, 4000000000 is a correct answer
16 Correct 0 ms 348 KB n = 5, 4000000000 is a correct answer
17 Correct 1 ms 348 KB n = 10, 1000000343 is a correct answer
18 Correct 1 ms 344 KB n = 10, 3189 is a correct answer
19 Correct 1 ms 600 KB n = 10, 7000000000 is a correct answer
20 Correct 0 ms 344 KB n = 5, 12 is a correct answer
21 Correct 1 ms 348 KB n = 5, 25 is a correct answer
22 Correct 0 ms 344 KB n = 2, 122 is a correct answer
23 Correct 1 ms 344 KB n = 10, 117 is a correct answer
24 Incorrect 1 ms 344 KB n = 10, incorrect answer: jury 336 vs contestant 338
25 Halted 0 ms 0 KB -