Submission #531157

#	Time	Username	Problem	Language	Result	Execution time	Memory
531157		sidon	Jump (BOI06_jump)	C++17	100 / 100	6 ms	2128 KiB

jump

#include <bits/stdc++.h>
using namespace std;

struct num {
	vector<int> v;
	num(int n = 0) : v({n}) {}

	void operator+=(const num &x) {
		int cur = 0, j = size(x.v);

		for(int i = 0; i < j || cur; ++i) {
			if(i < j) cur += x.v[i];

			if(int(size(v)) == i) v.push_back(0);
			cur += v[i];
			v[i] = cur % 10;
			cur /= 10;
		}
	}
	void print() {
		for(int i = size(v); i--; )
			cout << v[i];
	}
};

int main() {
	ios::sync_with_stdio(0), cin.tie(0);
	int n; cin >> n;

	int a[n][n];
	num b[n][n] {};

	for(int i = 0; i < n; ++i)
		for(int &j : a[i]) cin >> j;

	b[0][0] = num(1);

	for(int i = 0; i < n; ++i) {
		for(int j = 0; j < n; ++j) {
			if(i == n-1 && j == n-1) b[i][j].print();

			if(i + a[i][j] < n)	b[i + a[i][j]][j] += b[i][j];
			if(j + a[i][j] < n) b[i][j + a[i][j]] += b[i][j];
		}
	}
}

• Subtask 1: 100 / 100