結果
問題 | No.1301 Strange Graph Shortest Path |
ユーザー | ygussany |
提出日時 | 2020-11-27 21:53:16 |
言語 | C (gcc 12.3.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,629 bytes |
コンパイル時間 | 1,755 ms |
コンパイル使用メモリ | 31,232 KB |
実行使用メモリ | 18,204 KB |
最終ジャッジ日時 | 2024-09-13 00:54:39 |
合計ジャッジ時間 | 10,832 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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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 | 3 ms
8,796 KB |
testcase_01 | AC | 2 ms
8,568 KB |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | AC | 115 ms
15,876 KB |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | AC | 359 ms
17,468 KB |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | AC | 104 ms
17,764 KB |
ソースコード
#include <stdio.h> typedef struct { int key, id; } data; typedef struct { data obj[400001]; 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; long long cost; } list; int main() { int i, N, M, u, w, c, d; list *adj[100001] = {}, e[400001], *p; scanf("%d %d", &N, &M); for (i = 0; i < M; i++) { scanf("%d %d %d %d", &u, &w, &c, &d); e[i*4].v = w; e[i*4+1].v = u; e[i*4+2].v = w; e[i*4+3].v = u; e[i*4].cost = c; e[i*4+1].cost = c; e[i*4+2].cost = d; e[i*4+3].cost = d; e[i*4].id = i * 4; e[i*4+1].id = i * 4 + 1; e[i*4+2].id = i * 4 + 2; e[i*4+3].id = i * 4 + 3; e[i*4].next = adj[u]; e[i*4+1].next = adj[w]; adj[u] = &(e[i*4]); adj[w] = &(e[i*4+1]); e[i*4+2].next = adj[u]; e[i*4+3].next = adj[w]; adj[u] = &(e[i*4+2]); adj[w] = &(e[i*4+3]); } 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 = 1LL << 60; e[i^1].cost = 1LL << 60; } dist[1][N] = 0; da.key = 0; da.id = N; 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] + dist[1][1]); fflush(stdout); return 0; }