Submission #1336602

---

Source Code Expand

#define _USE_MATH_DEFINES
#include <cassert>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <queue>
#include <stack>
#include <list>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <algorithm>
#include <complex>
#include <cmath>
#include <numeric>
#include <bitset>

using namespace std;

#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
template <typename Arg1>
void __f(const char* name, Arg1&& arg1){
  cerr << name << ": " << arg1 << endl;
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args){
  const char* comma = strchr(names + 1, ',');
  cerr.write(names, comma - names) << ": " << arg1 << " |";
  __f(comma + 1, args...);
}

typedef long long int64;
typedef pair<int64, int> ii;
const int INF = 1 << 30;
const int MOD = 1e9 + 7;

map<int64, int64> dp;
int64 n, m;
vector<int64> f;

vector<int64> factor(int64 n) {
  vector<int64> ret;
  for (int64 i = 2; i * i <= n; ++i) {
    if (n % i == 0) {
      while (n % i == 0) {
        n /= i;
      }
      ret.push_back(i);
    }
  }
  if (n > 1) ret.push_back(n);
  return ret;
}

int64 solve(int64 n);

void DFS(int now, vector<ii>& can, int64 prod, int64 n, int64& ret) {
  if (now == can.size()) {
    if (prod == 1 || prod == n) return;
    ret = min(ret, solve(prod) + solve(n / prod) + m);
    return;
  }
  int64 cur = prod;
  for (int i = 0; i <= can[now].second; ++i) {
    DFS(now + 1, can, cur, n, ret);
    cur *= can[now].first;
  }
}

int64 solve(int64 n) {
  if (dp.find(n) != dp.end()) {
    return dp[n];
  }
  int64 ret = n;
  vector<ii> can;
  for (auto& p : f) {
    if (n % p == 0) {
      int cnt = 0;
      for (int64 m = n; m % p == 0; m /= p) ++cnt;
      can.push_back({p, cnt});
    }
  }
  DFS(0, can, 1, n, ret);
  dp.insert({n, ret});
  return ret;
}

int main() {
  scanf("%lld%lld", &n, &m);
  f = factor(n);
  printf("%lld\n", solve(n));
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:93:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld", &n, &m);
                            ^

Judge Result