結果
問題 | No.1301 Strange Graph Shortest Path |
ユーザー | ygussany |
提出日時 | 2020-11-27 22:33:39 |
言語 | C (gcc 12.3.0) |
結果 |
AC
|
実行時間 | 107 ms / 3,000 ms |
コード長 | 2,604 bytes |
コンパイル時間 | 1,769 ms |
コンパイル使用メモリ | 31,360 KB |
実行使用メモリ | 11,648 KB |
最終ジャッジ日時 | 2024-07-26 19:53:44 |
合計ジャッジ時間 | 5,520 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 107 ms
10,752 KB |
testcase_03 | AC | 94 ms
9,728 KB |
testcase_04 | AC | 102 ms
11,648 KB |
testcase_05 | AC | 98 ms
10,240 KB |
testcase_06 | AC | 101 ms
11,008 KB |
testcase_07 | AC | 96 ms
10,752 KB |
testcase_08 | AC | 83 ms
9,856 KB |
testcase_09 | AC | 94 ms
10,624 KB |
testcase_10 | AC | 76 ms
9,856 KB |
testcase_11 | AC | 106 ms
11,008 KB |
testcase_12 | AC | 93 ms
11,136 KB |
testcase_13 | AC | 93 ms
10,752 KB |
testcase_14 | AC | 84 ms
10,368 KB |
testcase_15 | AC | 85 ms
10,496 KB |
testcase_16 | AC | 106 ms
11,648 KB |
testcase_17 | AC | 101 ms
11,136 KB |
testcase_18 | AC | 83 ms
10,240 KB |
testcase_19 | AC | 90 ms
11,008 KB |
testcase_20 | AC | 87 ms
11,008 KB |
testcase_21 | AC | 94 ms
10,880 KB |
testcase_22 | AC | 82 ms
11,136 KB |
testcase_23 | AC | 97 ms
10,752 KB |
testcase_24 | AC | 96 ms
11,008 KB |
testcase_25 | AC | 105 ms
11,520 KB |
testcase_26 | AC | 94 ms
10,752 KB |
testcase_27 | AC | 94 ms
11,008 KB |
testcase_28 | AC | 83 ms
10,240 KB |
testcase_29 | AC | 100 ms
11,648 KB |
testcase_30 | AC | 106 ms
11,392 KB |
testcase_31 | AC | 105 ms
11,392 KB |
testcase_32 | AC | 2 ms
5,376 KB |
testcase_33 | AC | 51 ms
10,880 KB |
testcase_34 | AC | 103 ms
11,392 KB |
ソースコード
#include <stdio.h> typedef struct { long long key; int id; } data; typedef struct { data obj[200001]; int size; } min_heap; void push(data x, min_heap* h) { int i = ++(h->size), j = i >> 1; data tmp; h->obj[i] = x; while (j > 0) { if (h->obj[i].key < h->obj[j].key) { tmp = h->obj[j]; h->obj[j] = h->obj[i]; h->obj[i] = tmp; i = j; j >>= 1; } else break; } } data pop(min_heap* h) { int i = 1, j = 2; data output = h->obj[1], tmp; h->obj[1] = h->obj[(h->size)--]; while (j <= h->size) { if (j < h->size && h->obj[j^1].key < h->obj[j].key) j ^= 1; if (h->obj[j].key < h->obj[i].key) { tmp = h->obj[j]; h->obj[j] = h->obj[i]; h->obj[i] = tmp; i = j; j = i << 1; } else break; } return output; } typedef struct List { struct List *next; int v, id, memo; long long cost; } list; int main() { int i, N, M, u, w, c, d; list *adj[100001] = {}, e[200001], *p; scanf("%d %d", &N, &M); for (i = 0; i < M; i++) { scanf("%d %d %d %d", &u, &w, &c, &d); e[i*2].v = w; e[i*2+1].v = u; e[i*2].cost = c; e[i*2+1].cost = c; e[i*2].memo = d; e[i*2+1].memo = d; e[i*2].id = i * 2; e[i*2+1].id = i * 2 + 1; e[i*2].next = adj[u]; e[i*2+1].next = adj[w]; adj[u] = &(e[i*2]); adj[w] = &(e[i*2+1]); } int prev[2][100001], flag[2][100001] = {}; long long dist[2][100001]; for (i = 1; i <= N; i++) { dist[0][i] = 1LL << 60; dist[1][i] = 1LL << 60; prev[0][i] = -1; prev[1][i] = -1; } data da; min_heap h; h.size = 0; dist[0][1] = 0; da.key = 0; da.id = 1; push(da, &h); while (h.size > 0) { u = pop(&h).id; if (flag[0][u] != 0) continue; flag[0][u] = 0; for (p = adj[u]; p != NULL; p = p->next) { w = p->v; if (dist[0][u] + p->cost < dist[0][w]) { dist[0][w] = dist[0][u] + p->cost; prev[0][w] = p->id; da.key = dist[0][w]; da.id = w; push(da, &h); } } } for (i = prev[0][N]; i != -1; i = prev[0][e[i^1].v]) { e[i].cost = e[i].memo; e[i^1].cost *= -1; } for (i = 0; i < M; i++) { u = e[i*2+1].v; w = e[i*2].v; e[i*2].cost += dist[0][u] - dist[0][w]; e[i*2+1].cost += dist[0][w] - dist[0][u]; } dist[1][1] = 0; da.key = 0; da.id = 1; push(da, &h); while (h.size > 0) { u = pop(&h).id; if (flag[1][u] != 0) continue; flag[1][u] = 1; for (p = adj[u]; p != NULL; p = p->next) { w = p->v; if (dist[1][u] + p->cost < dist[1][w]) { dist[1][w] = dist[1][u] + p->cost; prev[1][w] = p->id; da.key = dist[1][w]; da.id = w; push(da, &h); } } } printf("%lld\n", dist[0][N] * 2 + dist[1][N]); fflush(stdout); return 0; }