33 строки
684 B
C++
33 строки
684 B
C++
#include<stdio.h>
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#include<math.h>
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int main(int argc, char **argv) {
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int arg = argc > 1 ? argv[1][0] - '0' : 3;
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switch(arg) {
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case 0: return 0; break;
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case 1: arg = 33000; break;
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case 2: arg = 130000; break;
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case 3: arg = 220000; break;
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case 4: arg = 610000; break;
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case 5: arg = 1010000; break;
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default: printf("error: %d\\n", arg); return -1;
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}
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int primes = 0, curri = 2;
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while (primes < arg) {
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int ok = true;
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for (int j = 2; j < sqrtf(curri); j++) {
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if (curri % j == 0) {
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ok = false;
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break;
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}
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}
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if (ok) {
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primes++;
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}
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curri++;
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}
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printf("lastprime: %d.\n", curri-1);
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return 0;
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}
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