本文已参与「新人创作礼」活动，一起开启掘金创作之路。
这是我做的图片（Codeforces@LetMeFly）
做了一张有坐标的图片，可能会帮助你解答E题 Having a picture with coordinates may help you solve E problem
E. Jordan Smiley time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output
Input The input contains two integers row, col (0≤row,col≤63), separated by a single space.
Output Output "IN" or "OUT".
（这是题目的图片）
Examples
input
0 0
output
OUT
input
27 0
output
IN
input
0 27
output
OUT
input
27 27
output
IN
其实就是判断一个点的坐标在不在封闭图形内。
外国大神的评论以及代码是：（Codeforces@brezhart）
First: fill area in photoshop
Second: Do 2d dimension arr. Check pixel at (i15)+5 (g15)+5. If it's white, put 0 in arr else put 1; Save that arr in file for use it in final solution. I picked Node.JS for this step.
var fs = require("fs");
var Canvas = require("canvas");
let fileLink = "smile.png";
var canvas = new Canvas.Canvas(960, 960, "png");
var ctx = canvas.getContext("2d");
const Image = Canvas.Image;
var image = new Image(963,964);
dataArr = [];
image.onload = function () {
ctx.drawImage(image,-2,-2,963,964);
for (let i = 0; i < 64; i++){
let newStr = [];
for (let g = 0; g < 64; g++){
var p = ctx.getImageData((g*15)+4, (i*15)+4, 1, 1).data;
if (p[2] < 240){
newStr.push(0)
} else {
newStr.push(1)
}
}
dataArr.push(newStr)
}
fs.writeFileSync("DATAOUT.txt",JSON.stringify(dataArr))
};
image.src = fileLink; Final solution: just get row and col and check arr[row][col] if it's 0 print "OUT" else print "IN"
这需要时间啊 ^…………^
同步发文于我的CSDN
