View Code of Problem 3703

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#define ll __int64
using namespace std;
const int maxn = 500005;
const ll mod = 1ll<<32;

ll num[maxn], dp[maxn];

void cal() {
	for (ll i = 1; i < maxn; i++) 
		for (ll j = i; j < maxn; j += i)
			num[j] += (j/i+1) * (j/i) / 2;
}

void init() {
	memset(num, 0, sizeof(num));
	cal();
	dp[1] = 1;
	for (ll i = 2; i < maxn; i++) {
		dp[i] = dp[i-1] + num[i]*i;
		dp[i] = dp[i] % mod;
	}
}

int main() {
	init();
	int t, n, cas = 1;
	scanf("%d", &t);
	while (t--) {
		scanf("%d", &n);
		printf("Case #%d: %I64d\n", cas++, dp[n]);
	}
	return 0;
}
/*
Main.cc:5:12: error: '__int64' does not name a type
 #define ll __int64
            ^
Main.cc:8:7: note: in expansion of macro 'll'
 const ll mod = 1ll<<32;
       ^
Main.cc:5:12: error: '__int64' does not name a type
 #define ll __int64
            ^
Main.cc:10:1: note: in expansion of macro 'll'
 ll num[maxn], dp[maxn];
 ^
Main.cc: In function 'void cal()':
Main.cc:5:12: error: '__int64' was not declared in this scope
 #define ll __int64
            ^
Main.cc:13:7: note: in expansion of macro 'll'
  for (ll i = 1; i < maxn; i++) 
       ^
Main.cc:13:17: error: 'i' was not declared in this scope
  for (ll i = 1; i < maxn; i++) 
                 ^
Main.cc:14:11: error: expected ';' before 'j'
   for (ll j = i; j < maxn; j += i)
           ^
Main.cc:14:18: error: 'j' was not declared in this scope
   for (ll j = i; j < maxn; j += i)
                  ^
Main.cc:15:4: error: 'num' was not declared in this scope
    num[j] += (j/i+1) * (j/i) / 2;
    ^
Main.cc: In function 'void init()':
Main.cc:19:9: error: 'num' was not declared in this scope
  memset(num, 0, sizeof(num));
         ^
Main.cc:21:2: error: 'dp' was not declared in this scope
  dp[1] = 1;
  ^
Main.cc:5:12: error: '__int64' was not declared in this scope
 #define ll __int64
            ^
Main.cc:22:7: note: in expansion of macro 'll'
  for (ll i = 2; i < maxn; i++) {
       ^
Main.cc:22:17: error: 'i' was not declared in this scope
  for (ll i = 2; i < maxn; i++) {
                 ^
Main.cc:24:19: error: 'mod' was not declared in this scope
   dp[i] = dp[i] % mod;
                   ^
Main.cc: In function 'int main()':
Main.cc:34:38: error: 'dp' was not declared in this scope
   printf("Case #%d: %I64d\n", cas++, dp[n]);
                                      ^
*/