18 lines
214 B
C
18 lines
214 B
C
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#include <stdio.h>
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int main()
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{
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long t, s, x;
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scanf("%ld %ld %ld", &t, &s, &x);
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x -= t;
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if (((x % s == 1) && (x / s > 0)) || ((x % s == 0) && (x / s >= 0)))
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puts("YES");
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else
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puts("NO");
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return 0;
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}
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