Submission #585056

#	Time	Username	Problem	Language	Result	Execution time	Memory
585056		maskrio	Knapsack (NOI18_knapsack)	C++17	0 / 100	1 ms	468 KiB

knapsack

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <sstream>
#include <queue>
#include <deque>
#include <bitset>
#include <iterator>
#include <list>
#include <stack>
#include <map>
#include <set>
#include <functional>
#include <numeric>
#include <utility>
#include <limits>
#include <time.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <iomanip>

using namespace std;


#define ll long long
#define deb(x) cout << #x << " = " << x << endl;
#define pb push_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define mp make_pair
#define fo(i, j) for(i=0;i<j;i++)
#define Fo(i, k, n) for(i=k;k<n?i<n:i>n;k<n?i++:i--)
#define MOD ((int)1e9+7)
#define imax INT_MAX
#define imin INT_MIN
#define PI 3.1415926535897932384626433832795
#define tr(it, x) for(auto it = x.begin(); it != x.end(); it++)
#define trr(it, x) for(auto it = x.rbegin(); it != x.rend(); it+)
#define sortall(x) sort(all(x))
#define here cout << "~~~~~~~~~~~~~~YES~~~~~~~~~~~~~~\n"; fflush(stdout);

typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<string> VS;
typedef vector<PII> VII;
typedef vector<VI> VVI;
typedef map<int,int> MPII;

template<typename T, typename U> inline void amin(T &x, U y) { if(y < x) x = y; }
template<typename T, typename U> inline void amax(T &x, U y) { if(x < y) x = y; }

void WVI(VI ar){
    int i;
    fo(i, ar.size()){
        cout << ar[i] << " ";
    }cout << endl;
}

void setIO(string name = ""){
    ios_base::sync_with_stdio(0); cin.tie(0);
    if(name.size()>0){
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}

const int mxN = 1e5+5;
const int INF = 1e9+50;
//**************************************************************

int s,n;
int v[mxN], w[mxN], k[mxN];
VVI dp;



int f(int weight, int x){
    if(dp[weight][x] != -1) return dp[weight][x];
    if(weight==0) dp[0][x] = 0;
    else{
        dp[weight][x] = f(weight-1, x);
        if(weight-w[x]>=0){
            if(k[x]>0){
                k[x]--;
                dp[weight][x] = max(dp[weight][x], f(weight-w[x], x)+v[x]);
                k[x]++;
            }
        }if(x>1){ if(weight-w[x-1]>=0){
            if(k[x-1]>0){
                k[x-1]--;
                dp[weight][x] = max(dp[weight][x], f(weight-w[x-1], x-1)+v[x-1]);
            }
        }}
    }
    return dp[weight][x];
}

void solve(){
    
    cin >> s >> n;
    dp.resize(s+5, VI(n+5, -1));
    for(int i=1;i<=n;i++){
        cin >> v[i] >> w[i] >> k[i];
    }
    cout << f(s,n) <<endl;
}

int main(){

    string name = "";
    setIO(name);
    int test_cases = 1;
    //cin >> test_cases;
    while(test_cases--) {
        solve();
    }

    return 0; 
}

Compilation message (stderr)

knapsack.cpp: In function 'void WVI(VI)':
knapsack.cpp:38:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 | #define fo(i, j) for(i=0;i<j;i++)
......
   61 |     fo(i, ar.size()){
      |        ~~~~~~~~~~~~        
knapsack.cpp:61:5: note: in expansion of macro 'fo'
   61 |     fo(i, ar.size()){
      |     ^~
knapsack.cpp: In function 'void setIO(std::string)':
knapsack.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 12
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 24
• Subtask 5: 0 / 27