Submission #948936

#	Time	Username	Problem	Language	Result	Execution time	Memory
948936		vjudge1	Land of the Rainbow Gold (APIO17_rainbow)	C++17	12 / 100	60 ms	3764 KiB

rainbow

#include <bits/stdc++.h>
#include "rainbow.h"
#define rep(a,b,c) for(int a=b; a<c; a++)
#define repa(a,b) for(auto a: b)
#define pii pair<int, int>
#define fi first
#define se second

using namespace std;

bool river[3][200005]{};
int pref[3][200005]{};

void init(int R, int C, int sr, int sc, int M, char *S){
	if(R!=2) exit(0);
	river[sr][sc]=true;
	rep(i,0,M){
		if(S[i]=='N') sr--;
		else if(S[i]=='S') sr++;
		else if(S[i]=='W') sc--;
		else sc++;
		river[sr][sc]=true;
	}
	rep(i,1,C+1){
		pref[0][i]+=pref[0][i-1];
		pref[1][i]+=pref[1][i-1];
		pref[2][i]+=pref[2][i-1];
		if(river[1][i-1] && (!river[1][i])) pref[0][i]++;
		if(river[2][i-1] && (!river[2][i])) pref[1][i]++;
		if((river[1][i-1] && river[2][i-1]) && (!river[1][i] || !river[2][i])) pref[2][i]++;
	}
}

int colour(int ar, int ac, int br, int bc){
	int x, c;
	if(br>ar) x=2;
	else x=ar-1;
	c=pref[x][bc]-pref[x][ac-1];
	c+=((!river[ar][ac] || !river[br][ac]) && (!river[ar][ac-1] || !river[br][ac-1]));
	return c;
}

• Subtask 1: 0 / 11
• Subtask 2: 12 / 12
• Subtask 3: 0 / 24
• Subtask 4: 0 / 27
• Subtask 5: 0 / 26