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Update multiply_detect_overflow.cpp

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Lines changed: 2 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -20,7 +20,8 @@ long long mul(long long a, long long b) {`
`20`	`20`	`r3 = t.second * s.first;`
`21`	`21`	`r4 = t.second * s.second;`
`22`	`22`
`23`		`- if (r1 && (r2 \|\| r3 \|\| r4)) return INF;`
	`23`	`+ if (r1 > 1) return INF;`
	`24`	`+ else if (r1 && (r2 \|\| r3 \|\| r4)) return INF;`
`24`	`25`	`else if ((r2 + r3) > 1000000000) return INF;`
`25`	`26`	`else if ((r2 + r3)*1000000000 + r4 > 1000000000000000000LL) return INF;`
`26`	`27`	`else return r11000000000000000000LL + (r2 + r3)1000000000 + r4;`

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