Submission #564173

#	Time	Username	Problem	Language	Result	Execution time	Memory
564173		SSRS	Jump (BOI06_jump)	C++14	100 / 100	7 ms	1620 KiB

jump

#include <bits/stdc++.h>
using namespace std;
struct bigint{
  vector<int> d;
  bigint(){
  }
  bigint(int x){
    while (x > 0){
      d.push_back(x % 10);
      x /= 10;
    }
    if (d.empty()){
      d.push_back(0);
    }
  }
  int operator [](int k){
    return d[k];
  }
  int size(){
    return d.size();
  }
};
ostream& operator <<(ostream& os, bigint x){
  int N = x.size();
  for (int i = N - 1; i >= 0; i--){
    os << x[i];
  }
  return os;
}
bigint operator +(bigint A, bigint B){
  int N1 = A.size();
  int N2 = B.size();
  int N = max(N1, N2) + 1;
  bigint C;
  C.d = vector<int>(N, 0);
  for (int i = 0; i < N1; i++){
    C.d[i] += A[i];
  }
  for (int i = 0; i < N2; i++){
    C.d[i] += B[i];
  }
  for (int i = 0; i < N - 1; i++){
    if (C[i] >= 10){
      C.d[i + 1]++;
      C.d[i] -= 10;
    }
  }
  if (C.size() >= 2 && C[N - 1] == 0){
    C.d.pop_back();
  }
  return C;
}
int main(){
  int n;
  cin >> n;
  vector<vector<int>> A(n, vector<int>(n));
  for (int i = 0; i < n; i++){
    for (int j = 0; j < n; j++){
      cin >> A[i][j];
    }
  }
  vector<vector<bigint>> dp(n, vector<bigint>(n, 0));
  dp[0][0] = 1;
  for (int i = 0; i < n; i++){
    for (int j = 0; j < n; j++){
    	if (A[i][j] > 0){
        if (i + A[i][j] < n){
          dp[i + A[i][j]][j] = dp[i + A[i][j]][j] + dp[i][j];
        }
        if (j + A[i][j] < n){
          dp[i][j + A[i][j]] = dp[i][j + A[i][j]] + dp[i][j];
        }
      }
    }
  }
  cout << dp[n - 1][n - 1] << endl;
}

• Subtask 1: 100 / 100