$O(1)$
#include<cstdio> int a, b, c; int main() { scanf("%d %d %d", &a, &b, &c); if (a + b + c - 180) puts("Error"); else if (a != b && b != c && c != a) puts("Scalene"); else if (a == 60) puts("Equilateral"); else puts("Isosceles"); return 0; }
#include<cstdio> int a, b, c; int main() { scanf("%d %d %d", &a, &b, &c); if (a + b + c - 180) puts("Error"); else if (a != b && b != c && c != a) puts("Scalene"); else if (a == 60) puts("Equilateral"); else puts("Isosceles"); return 0; }
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