17 lines
211 B
Text
17 lines
211 B
Text
long fi(int n) {
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if (n < 0){
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return -1;
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}
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if (n == 0){
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return 1;
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} else {
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long r = 1;
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for (long i = 1; i <= n; i++){
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r = r * i;
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}
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return r;
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}
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}
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