Submission #127566

#	Time	Username	Problem	Language	Result	Execution time	Memory
127566		Vlatko	Maja (COCI18_maja)	C++14	Compilation error	0 ms	0 KiB

maja

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int inf = 1e9;
const int maxn = 100;

int N, M, A, B;
ll K, T;
ll C[maxn][maxn];

// dp[k][i][j] = max sum for path to here after k steps
vector<vector<ll>> cur(maxn, vector<ll>(maxn));
vector<vector<ll>> nxt(maxn, vector<ll>(maxn));

void dp_step() {
	for (int i = 0; i < N; ++i) {
		for (int j = 0; i < M; ++j) {
			nxt[i][j] = -inf;
			for (int d = 0; d < 4; ++d) {
				int i1 = i + di[d], j1 = j + dj[d];
				if (i1 >= 0 && i1 < N && j1 >= 0 && j1 < M) {
					nxt[i][j] = max(nxt[i][j], cur[i1][j1] + C[i][j]);
				}
			}
		}
	}
	swap(cur, nxt);
}

void simulate() {
	for (int i = 0; i < N; ++i) {
		for (int j = 0; j < M; ++j) {
			ll gains = -inf;
			for (int d = 0; d < 4; ++d) {
				int i1 = i + di[d], j1 = j + dj[d];
				if (i1 >= 0 && i1 < N && j1 >= 0 && j1 < M) {
					gains = max(gains, C[i1][j1] + C[i][j]);
				}
			}
			cur[i][j] += gains * (K - 2*T) / 2;
		}
	}
}

int main() {
	ios::sync_with_stdio(false); cin.tie(0);
	cin >> N >> M >> K >> A >> B;
	--A, --B;
	T = N * M * 2;
	for (int i = 0; i < N; ++i) {
		for (int j = 0; j < M; ++j) {
			cin >> C[i][j];
			cur[i][j] = -inf;
		}
	}
	cur[A][B] = 0;
	if (2*T >= K) {
		for (int i = 0; i < K; ++i) {
			dp_step();
		}
	} else {
		// T steps, simulate going back and forth, T steps again
		for (int i = 0; i < T; ++i) {
			dp_step();
		}
		simulate();
		for (int i = 0; i < T; ++i) {
			dp_step();
		}
	}
	cout << cur[A][B] << '\n';
}

Compilation message (stderr)

maja.cpp: In function 'void dp_step()':
maja.cpp:23:18: error: 'di' was not declared in this scope
     int i1 = i + di[d], j1 = j + dj[d];
                  ^~
maja.cpp:23:18: note: suggested alternative: 'd'
     int i1 = i + di[d], j1 = j + dj[d];
                  ^~
                  d
maja.cpp:24:46: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
     if (i1 >= 0 && i1 < N && j1 >= 0 && j1 < M) {
                                              ^
maja.cpp:25:43: error: invalid conversion from 'double (*)(double) throw ()' to 'std::vector<long long int>::size_type {aka long unsigned int}' [-fpermissive]
      nxt[i][j] = max(nxt[i][j], cur[i1][j1] + C[i][j]);
                                           ^
In file included from /usr/include/c++/7/vector:64:0,
                 from /usr/include/c++/7/queue:61,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:86,
                 from maja.cpp:1:
/usr/include/c++/7/bits/stl_vector.h:795:7: note:   initializing argument 1 of 'std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](std::vector<_Tp, _Alloc>::size_type) [with _Tp = long long int; _Alloc = std::allocator<long long int>; std::vector<_Tp, _Alloc>::reference = long long int&; std::vector<_Tp, _Alloc>::size_type = long unsigned int]'
       operator[](size_type __n) _GLIBCXX_NOEXCEPT
       ^~~~~~~~
maja.cpp: In function 'void simulate()':
maja.cpp:38:18: error: 'di' was not declared in this scope
     int i1 = i + di[d], j1 = j + dj[d];
                  ^~
maja.cpp:38:18: note: suggested alternative: 'd'
     int i1 = i + di[d], j1 = j + dj[d];
                  ^~
                  d
maja.cpp:39:46: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
     if (i1 >= 0 && i1 < N && j1 >= 0 && j1 < M) {
                                              ^
maja.cpp:40:33: error: invalid types 'll [100] {aka long long int [100]}[double(double) throw ()]' for array subscript
      gains = max(gains, C[i1][j1] + C[i][j]);
                                 ^