20251103 baekjoon

code_study/Baekjoon/ts/2166.ts

@@ -0,0 +1,18 @@
+export {};
+
+const square = (N: number, point: number[][]): string => {
+    let temp = 0;
+    for(let i=0; i<N; i++) {
+        temp += point[i][0]*point[i+1][1] - point[i+1][0]*point[i][1];
+    }
+    return (0.5*Math.abs(temp)).toFixed(1);
+}
+
+const input = require("fs").readFileSync(0).toString().trim().split('\n');
+const N = Number(input[0]);
+
+let point: number[][] = [];
+for(let i=1; i<=N; i++) point.push(input[i].split(" ").map(Number));
+point.push(point[0]);
+
+console.log(square(N, point));