Submission #1370638


Source Code Expand

#include <iostream>
#include <cstdio>
using namespace std;

typedef long long ll;
const int MOD = 1e9 + 7;
int field[1010][1010]; // グローバル配列なので、宣言した時点で全要素が0に初期化される
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};
ll dp[1010][1010];

ll dfs(int y, int x) {
  if (dp[y][x] == 0) {
    for (int i = 0; i < 4; i++) {
      int ny = y + dy[i];
      int nx = x + dx[i];
      if (field[ny][nx] > field[y][x]) {
        dp[y][x] += 1 + dfs(ny, nx);
      }
    }
  }

  return dp[y][x] % MOD;
}

int main() {
  int H, W;
  cin >> H >> W;
  for (int i = 1; i < H + 1; i++) {
    for (int j = 1; j < W + 1; j++) {
      scanf("%d", field[i] + j);
    }
  }

  // メモ化再帰
  ll ans = 0;
  for (int i = 1; i < H + 1; i++) {
    for (int j = 1; j < W + 1; j++) {
      if (dp[i][j] == 0) {
        dp[i][j] = dfs(i, j);
      }
      ans += dp[i][j];
      ans %= MOD;
    }
  }

  // 解答
  cout << ans + H * W << endl;
  return 0;
}

Submission Info

Submission Time
Task D - 経路
User university
Language C++14 (GCC 5.4.1)
Score 100
Code Size 1046 Byte
Status AC
Exec Time 161 ms
Memory 12288 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:31:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d", field[i] + j);
                                ^

Judge Result

Set Name sample All
Score / Max Score 0 / 0 100 / 100
Status
AC × 2
AC × 24
Set Name Test Cases
sample sample01.txt, sample02.txt
All 00.txt, 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, sample01.txt, sample02.txt, sample01.txt, sample02.txt
Case Name Status Exec Time Memory
00.txt AC 121 ms 12288 KB
01.txt AC 120 ms 12288 KB
02.txt AC 104 ms 12160 KB
03.txt AC 2 ms 2304 KB
04.txt AC 2 ms 2304 KB
05.txt AC 2 ms 2304 KB
06.txt AC 2 ms 2304 KB
07.txt AC 2 ms 2304 KB
08.txt AC 2 ms 2432 KB
09.txt AC 2 ms 2304 KB
10.txt AC 2 ms 2560 KB
11.txt AC 161 ms 12160 KB
12.txt AC 161 ms 12288 KB
13.txt AC 160 ms 12160 KB
14.txt AC 161 ms 12160 KB
15.txt AC 138 ms 12288 KB
16.txt AC 161 ms 12160 KB
17.txt AC 161 ms 12160 KB
18.txt AC 108 ms 12160 KB
19.txt AC 88 ms 12160 KB
sample01.txt AC 2 ms 2304 KB
sample02.txt AC 2 ms 2304 KB