Submission #272406

#	Time	Username	Problem	Language	Result	Execution time	Memory
272406		eohomegrownapps	Restore Array (RMI19_restore)	C++14	100 / 100	394 ms	892 KiB

restore

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int n,m;
int INF = 1e9;

void relaxedges(){
    int a[20001], b[20001], c[20001];
    for (int i = 0; i<m; i++){
        int l,r,k,v;
        cin>>l>>r>>k>>v;
        r++;
        if (v==0){
            a[i]=l;
            b[i]=r;
            c[i]=k-(r-l);
        } else {
            a[i]=r;
            b[i]=l;
            c[i]=(r-l)-k+1;
        }
    }
    for (int i = 0; i<n; i++){
        a[m+2*i]=i;
        b[m+2*i]=i+1;
        c[m+2*i]=-1;
        a[m+2*i+1]=i+1;
        b[m+2*i+1]=i;
        c[m+2*i+1]=0;
    }
    m+=2*n;
    bool changed = true;
    bool works = true;
    int vals[20001];
    vals[0]=0;
    for (int i = 1; i<=n; i++){
        vals[i]=INF;
    }
    for (int i = 0; i<=n; i++){
        bool changed = false;
        for (int i = 0; i<m; i++){
            if (vals[b[i]]>vals[a[i]]-c[i]){
                vals[b[i]]=vals[a[i]]-c[i];
                changed=true;
            }
        }
        if (changed&&i==n){
            works=false;
        }
        //if (!changed){break;}
    }
    if (!works){
        cout<<-1<<'\n';
        return;
    }
    /*for (int i = 0; i<=n; i++){
        cout<<vals[i]<<' ';
    }cout<<'\n';*/
    for (int i = 0; i<n; i++){
        cout<<vals[i+1]-vals[i]<<' ';
    }cout<<'\n';
}


int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    cin>>n>>m;
    /*if (n<=18){
        subtask1();
    } else {*/
        relaxedges();
    //}
}

Compilation message (stderr)

restore.cpp: In function 'void relaxedges()':
restore.cpp:33:10: warning: unused variable 'changed' [-Wunused-variable]
   33 |     bool changed = true;
      |          ^~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 13 / 13
• Subtask 3: 25 / 25
• Subtask 4: 55 / 55