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20 lines
415 B
C
20 lines
415 B
C
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#include <stdio.h>
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int main() {
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int x1, y1, x2, y2, x3, y3;
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scanf("%d%d%d%d%d%d", &x1, &y1, &x2, &y2, &x3, &y3);
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int d1 = (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
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int d2 = (x1 - x3) * (x1 - x3) + (y1 - y3) * (y1 - y3);
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int d3 = (x2 - x3) * (x2 - x3) + (y2 - y3) * (y2 - y3);
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if (d1 + d2 == d3) {
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printf("yes\n");
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} else {
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printf("no\n");
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}
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return 0;
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}
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