Submission #634897

#	Time	Username	Problem	Language	Result	Execution time	Memory
634897		vendx_greyback	Jump (BOI06_jump)	C++14	100 / 100	10 ms	1140 KiB

jump

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) (x).begin(),(x).end()
 
typedef pair<int,int> ppi;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
 
string add(string num1, string num2){
    
    while(num1.size() < num2.size())
        num1.push_back('0');
        
    while(num1.size() > num2.size())
        num2.push_back('0');
        
    string ans;
    int carry = 0;
    
    for(int i = 0; i < num1.size(); i++){
        int curr = (num1[i] - '0') + (num2[i] - '0') + carry;
        ans.push_back((curr % 10) + '0');
        carry = curr / 10;
    }
    
    if(carry)
        ans.push_back(carry + '0');
        
    return ans;
    
}
 
int32_t main() {
	
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	int n;
	cin>>n;
	
	int grid[n][n];
	for(int i = 0; i < n; i++)
	    for(int j = 0; j < n; j++)
	        cin>>grid[i][j];
	        
	string dp[n][n];
	
	for(int i = n-1; i >= 0; i--){
	    for(int j = n-1; j >= 0; j--){
	        
	        if(i == n-1 && j == n-1){
	            dp[i][j] = "1";
	            continue;
	        } 
	        
	        
	        dp[i][j] = "0";
	        
	        if(i + grid[i][j] < n)
	            dp[i][j] = add(dp[i][j], dp[i + grid[i][j]][j]);
	            
	        if(j + grid[i][j] < n)
	            dp[i][j] = add(dp[i][j], dp[i][j + grid[i][j]]);
	        
	        
	    }
	}
	
	reverse(all(dp[0][0]));
	cout<<dp[0][0];
	
	
	return 0;
}

Compilation message (stderr)

jump.cpp: In function 'std::string add(std::string, std::string)':
jump.cpp:21:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(int i = 0; i < num1.size(); i++){
      |                    ~~^~~~~~~~~~~~~

• Subtask 1: 100 / 100