結果

問題 No.1 道のショートカット
ユーザー mudbdb
提出日時 2015-06-08 00:17:13
言語 C90
(gcc 12.3.0)
結果
AC  
実行時間 2 ms / 5,000 ms
コード長 3,165 bytes
コンパイル時間 335 ms
コンパイル使用メモリ 23,296 KB
実行使用メモリ 5,376 KB
最終ジャッジ日時 2024-07-20 16:14:51
合計ジャッジ時間 1,530 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge1
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ファイルパターン 結果
sample AC * 4
other AC * 40
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.c: In function ‘main’:
main.c:20:3: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   20 |   scanf("%d", &N);
      |   ^~~~~~~~~~~~~~~
main.c:21:3: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   21 |   scanf("%d", &C);
      |   ^~~~~~~~~~~~~~~
main.c:22:3: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   22 |   scanf("%d", &V);
      |   ^~~~~~~~~~~~~~~
main.c:24:23: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   24 |   for (i=0; i<V; i++) scanf("%d", &(keiro[i].S));
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~
main.c:25:23: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   25 |   for (i=0; i<V; i++) scanf("%d", &(keiro[i].T));
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~
main.c:26:23: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   26 |   for (i=0; i<V; i++) scanf("%d", &(keiro[i].Y));
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~
main.c:27:23: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   27 |   for (i=0; i<V; i++) scanf("%d", &(keiro[i].M));
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~

ソースコード

diff # 

#include <stdio.h>
#include <stdlib.h>
struct keiro {
  int S; int T; int Y; int M;
};
int cmp(const void* a, const void* b)
{
  struct keiro *c = (struct keiro*)a;
  struct keiro *d = (struct keiro*)b;
  if (c->S == d->S) {
    return (c->T - d->T);
  } else {
    return (c->S - d->S);
  }
}
int main()
{
  int N, C, V, i;
  struct keiro *keiro;
  scanf("%d", &N);
  scanf("%d", &C);
  scanf("%d", &V);
  keiro = (struct keiro*)malloc(sizeof(struct keiro)*V);
  for (i=0; i<V; i++) scanf("%d", &(keiro[i].S));
  for (i=0; i<V; i++) scanf("%d", &(keiro[i].T));
  for (i=0; i<V; i++) scanf("%d", &(keiro[i].Y));
  for (i=0; i<V; i++) scanf("%d", &(keiro[i].M));

  qsort(keiro, V, sizeof(struct keiro), cmp);

  struct keiro_start {
    int pos; int renge;
    struct keiro *keiro;
  };
  struct keiro_start *keiro_start
   = (struct keiro_start*)malloc(sizeof(struct keiro_start )*N);
  for (i=0; i<N; i++) keiro_start[i].renge = 0;
  for (i=0; i<V; i++) keiro_start[keiro[i].S - 1].renge ++;
  keiro_start[0].pos = 0;
  for (i=1; i<N; i++)
    keiro_start[i].pos = keiro_start[i-1].pos + keiro_start[i-1].renge;
  for (i=0; i<N; i++)
    if (keiro_start[i].renge == 0) {
      keiro_start[i].keiro = 0;
    } else {
      keiro_start[i].keiro = &(keiro[keiro_start[i].pos]);
    }

  int check_jikan;
  int jikan = 0;
  for (i=0; i<V; i++) jikan += keiro[i].M;
  jikan++;
  check_jikan = jikan;

  struct mati {
    int no; int Y; int M;
    int keiro_i; int keiro_n;
    struct keiro *keiro;
  };
  struct mati *mati = (struct mati*)malloc(sizeof(struct mati)*N);
  struct mati *mati_p = mati;
  mati_p->no = 1;
  mati_p->Y = C;
  mati_p->M = 0;
  mati_p->keiro_i = 0;
  mati_p->keiro_n = keiro_start[mati_p->no - 1].renge;
  mati_p->keiro = keiro_start[mati_p->no - 1].keiro;
  struct mati *mati_from = 0;
  while (mati_p->keiro != 0 && mati_p->Y >= 0 && mati_p->M < jikan) {
    mati_from = mati_p;
    mati_p++;
    mati_p->no = mati_from->keiro->T;
    mati_p->Y = mati_from->Y - mati_from->keiro->Y;
    mati_p->M = mati_from->M + mati_from->keiro->M;
    mati_p->keiro_i = 0;
    mati_p->keiro_n = keiro_start[mati_p->no - 1].renge;
    mati_p->keiro = keiro_start[mati_p->no - 1].keiro;
  }

  while (1) {
    if (mati_p->no == N) {
      if (mati_p->Y >= 0) {
        if (mati_p->M < jikan) {
          jikan = mati_p->M;
        }
      }
    }

    while (1) {
      if (mati_p == mati) {
        goto END;
      } else {
        mati_p--;
        mati_p->keiro_i++;
        if (mati_p->keiro_i < mati_p->keiro_n) {
          mati_p->keiro++;
          break;
        } else {
          continue;
        }
      }
    }

    while (mati_p->keiro != 0 && mati_p->Y >= 0 && mati_p->M < jikan) {
      mati_from = mati_p;
      mati_p++;
      mati_p->no = mati_from->keiro->T;
      mati_p->Y = mati_from->Y - mati_from->keiro->Y;
      mati_p->M = mati_from->M + mati_from->keiro->M;
      mati_p->keiro_i = 0;
      mati_p->keiro_n = keiro_start[mati_p->no - 1].renge;
      mati_p->keiro = keiro_start[mati_p->no - 1].keiro;
    }
  }
END:
  if (jikan == check_jikan) {
    printf("%d\n", -1);
  } else {
    printf("%d\n", jikan);
  }
  return 0;
}
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