OJ 1166

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#include <stdio.h> int main(void) { int n; int sum = 0; scanf("%d", &n); for (int i = 1; i <= n; i++) { int temp = i; while (temp != 0) { if (temp % 10 == 2) { sum = sum + i; break; } else { temp = temp / 10; } } } printf("%d", sum); }