시간 제한 | 메모리 제한 | 제출 | 정답 | 맞힌 사람 | 정답 비율 |
---|---|---|---|---|---|
2 초 | 128 MB | 93 | 45 | 30 | 55.556% |
For their physical fitness program, N (2 <= N <= 1,000,000) cows have decided to run a relay race using the T (2 <= T <= 100) cow trails throughout the pasture.
Each trail connects two different intersections (1 <= I1_i <= 1,000; 1 <= I2_i <= 1,000), each of which is the termination for at least two trails. The cows know the length_i of each trail (1 <= length_i <= 1,000), the two intersections the trail connects, and they know that no two intersections are directly connected by two different trails. The trails form a structure known mathematically as a graph.
To run the relay, the N cows position themselves at various intersections (some intersections might have more than one cow). They must position themselves properly so that they can hand off the baton cow-by-cow and end up at the proper finishing place.
Write a program to help position the cows. Find the shortest path that connects the starting intersection (S) and the ending intersection (E) and traverses exactly N cow trails.
2 6 6 4 11 4 6 4 4 8 8 4 9 6 6 8 2 6 9 3 8 9
10
12 6 6 4 11 4 6 4 4 8 8 4 9 6 6 8 2 6 9 3 8 9
30