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#include const int maxn = 10010; int dp[maxn]; int main(){ int n; scanf("%d", &n); dp[1] = 1; dp[2] = 2; for(int i = 3; i <= n; i++){ dp[i] = (dp[i - 1] + dp[i - 2]) % 999983; } printf("%d", dp[n]); return 0; }
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