Submission #198556

#	Time	Username	Problem	Language	Result	Execution time	Memory
198556		alexandra_udristoiu	Crocodile's Underground City (IOI11_crocodile)	C++14	100 / 100	1226 ms	61048 KiB

crocodile

#include "crocodile.h"
#include<iostream>
#include<vector>
#include<set>
#define DIM 100005
#define f first
#define s second
using namespace std;
static int viz[DIM];
static pair<int, int> d[DIM];
static vector< pair<int, int> > v[DIM];
static set< pair<int, int> > h;
int travel_plan(int n, int m, int r[][2], int L[], int k, int p[]){
    int i, nod, ii, vecin;
    set< pair<int, int> > :: iterator it;
    for(i = 1; i <= n; i++){
        d[i].f = d[i].s = 1000000000;
    }
    for(i = 0; i < k; i++){
        p[i]++;
        d[ p[i] ] = make_pair(0, 0);
    }
    for(i = 0; i < m; i++){
        r[i][0]++; r[i][1]++;
        v[ r[i][0] ].push_back( make_pair(r[i][1], L[i]) );
        v[ r[i][1] ].push_back( make_pair(r[i][0], L[i]) );
    }
    d[0].s = 1000000001;
    for(i = 1; i <= n; i++){
        h.insert( make_pair(d[i].s, i) );
    }
    for(ii = 1; ii <= n; ii++){
        it = h.begin();
        nod = it->s;
        h.erase(it);
        viz[nod] = 1;
        for(i = 0; i < v[nod].size(); i++){
            vecin = v[nod][i].f;
            if(d[vecin].f > d[nod].s + v[nod][i].s){
                h.erase( make_pair(d[vecin].s, vecin) );
                d[vecin].s = d[vecin].f;
                d[vecin].f = d[nod].s + v[nod][i].s;
                h.insert( make_pair(d[vecin].s, vecin) );
            }
            else{
                if(d[vecin].s > d[nod].s + v[nod][i].s){
                    h.erase( make_pair(d[vecin].s, vecin) );
                    d[vecin].s = d[nod].s + v[nod][i].s;
                    h.insert( make_pair(d[vecin].s, vecin) );
                }
            }
        }
    }
    return d[1].s;
}

Compilation message (stderr)

crocodile.cpp: In function 'int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:37:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(i = 0; i < v[nod].size(); i++){
                    ~~^~~~~~~~~~~~~~~

• Subtask 1: 46 / 46
• Subtask 2: 43 / 43
• Subtask 3: 11 / 11