Submission #2123350

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Source Code Expand

#include<iostream>
#include<algorithm>
#include<vector>
#include<climits>
using namespace std;
typedef long long int ll;
static const int MAX_N = 100;
static const ll INF = LLONG_MAX;
 
struct edge{int to; ll cap; int rev;};
 
vector<edge> G[MAX_N + 2];
 
int N;
ll A[MAX_N + 1];
bool used[MAX_N + 2];
 
void add_edge(int from, int to, ll cap){
  G[from].push_back((edge){to, cap, G[to].size()});
  G[to].push_back((edge){from, 0, G[from].size() - 1});
}
 
ll dfs(int v, int t, ll f){
  if(v == t) return f;
  used[v] = true;
  for(int i = 0; i < G[v].size(); i++){
    edge &e = G[v][i];
    if(!used[e.to] && e.cap > 0){
      ll d = dfs(e.to, t, min(f, e.cap));
      if(d > 0){
    e.cap -= d;
    G[e.to][e.rev].cap += d;
    return d;
      }
    }
  }
  return 0;
}
 
ll max_flow(int s, int t){
  ll flow = 0;
  for(;;){
    fill(used, used + N + 2, false);
    ll f = dfs(s, t, INF);
    if(f == 0) return flow;
    flow += f;
  }
}

int main(){
	cin >> N;
	for(int i = 1; i <= N; i++) cin >> A[i];
	ll sum = 0LL;
	for(int i = 1; i <= N; i++){
		if(A[i] < 0){
			add_edge(0, i, -A[i]);
		}else{
			add_edge(i, N + 1, A[i]);
			sum += A[i];
		}
		for(int j = 2; j * i <= N; j++){
			add_edge(i, j * i, INF);
		}
	}
	cout << sum - max_flow(0, N + 1) << endl;
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘void add_edge(int, int, ll)’:
./Main.cpp:19:47: warning: narrowing conversion of ‘G[to].std::vector<_Tp, _Alloc>::size<edge, std::allocator<edge> >()’ from ‘std::vector<edge>::size_type {aka long unsigned int}’ to ‘int’ inside { } [-Wnarrowing]
   G[from].push_back((edge){to, cap, G[to].size()});
                                               ^
./Main.cpp:20:50: warning: narrowing conversion of ‘(G[from].std::vector<_Tp, _Alloc>::size<edge, std::allocator<edge> >() + 18446744073709551615ul)’ from ‘std::vector<edge>::size_type {aka long unsigned int}’ to ‘int’ inside { } [-Wnarrowing]
   G[to].push_back((edge){from, 0, G[from].size() - 1});
                                                  ^

Judge Result