Submission #738893

#	Time	Username	Problem	Language	Result	Execution time	Memory
738893		1ne	Land of the Rainbow Gold (APIO17_rainbow)	C++14	Compilation error	0 ms	0 KiB

rainbow

#include "rainbow.h"
#include <bits/stdc++.h>
using namespace std;
vector<vector<int>>r;
int n,m;
vector<int>dx = {-1,0,1,0};
vector<int>dy = {0,1,0,-1};
void init(int R, int C, int sr, int sc, int M, char *S) {
	n = R,m = c;
	r.resize(R,vector<int>(C,0));
	--sr;--sc;
	for (auto x:*S){
		r[sr][sc] = 1;
		if (x == 'N'){
			sr--;
		}
		else if (x == 'S'){
			sr++;
		}
		else if (x == 'W'){
			sc--;
		}
		else{
			sc++;
		}
	}		
}

int colour(int ar, int ac, int br, int bc) {
    vector<vector<bool>>visited(n,vector<bool>(m,0));
    int ans = 0;
    function<void(int,int)>dfs = [&](int u,int v){
    	visited[u][v] = true;
    	for (int i = 0;i<4;++i){
    		int nx = u + dx[i];
    		int ny = v + dy[i];
    		if (nx >=ar - 1 && nx < br && ny >= ac - 1 && ny < bc && !visited[nx][ny]){
    			dfs(nx,ny);
    		}
    	}
    };
    for (int i = ar - 1;i<br;++i){
    	for (int j = ac - 1;j<bc;++j){
    		if (!visited[i][j]){
    			dfs(i,j);
    			ans++;
    		}
    	}
    }
    return ans;
}

Compilation message (stderr)

rainbow.cpp: In function 'void init(int, int, int, int, int, char*)':
rainbow.cpp:9:12: error: 'c' was not declared in this scope
    9 |  n = R,m = c;
      |            ^
rainbow.cpp:12:15: error: 'begin' was not declared in this scope; did you mean 'std::begin'?
   12 |  for (auto x:*S){
      |               ^
      |               std::begin
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
                 from rainbow.cpp:2:
/usr/include/c++/10/valarray:1224:5: note: 'std::begin' declared here
 1224 |     begin(const valarray<_Tp>& __va)
      |     ^~~~~
rainbow.cpp:12:15: error: 'end' was not declared in this scope; did you mean 'std::end'?
   12 |  for (auto x:*S){
      |               ^
      |               std::end
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
                 from rainbow.cpp:2:
/usr/include/c++/10/valarray:1244:5: note: 'std::end' declared here
 1244 |     end(const valarray<_Tp>& __va)
      |     ^~~