Submission #182152

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
182152	2020-01-09 12:06:49	Ruxandra985	Toll (BOI17_toll)	C++14	100 / 100	1279 ms	173228 KiB

toll

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#include <bits/stdc++.h>
#define INF 2000000000
using namespace std;
map <int,int> rmq[20][50010];
map <int , pair <int,int> > mp;
int lg[50010] , step[50010];
deque <pair <int,int> > dq;
int main()
{
    FILE *fin = stdin;
    FILE *fout = stdout;
    int k , n , m , o , x , y, z, i , j , p , len , elem , nod , nr , nrr;
    fscanf (fin,"%d%d%d%d",&k,&n,&m,&o);
    for (i=1;i<=m;i++){
        fscanf (fin,"%d%d%d",&x,&y,&z);
        rmq[0][min(x , y)][max(x , y)] = z;
    }
    for (i=2;i<=n;i++)
        lg[i] = 1 + lg[i/2];
    for (p=1;(1<<p) <= n/k;p++){
        for (i=0;i<=n;i++){
            if (i / k + (1 << p) <= n / k){ /// e ok
 
                for (j = (i / k + (1 << p)) * k ; j < (i / k + (1 << p) + 1) * k; j++){
                        for (x = (i / k + (1 << (p-1))) * k ; x < (i / k + (1 << (p-1)) + 1) * k; x++){
                            if (rmq[p-1][i][x] && rmq[p-1][x][j]){
                                if (!rmq[p][i][j])
                                    rmq[p][i][j] = rmq[p-1][i][x] + rmq[p-1][x][j];
                                else rmq[p][i][j] = min(rmq[p][i][j] , rmq[p-1][i][x] + rmq[p-1][x][j]);
                            }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

toll.cpp: In function 'int main()':
toll.cpp:13:12: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     fscanf (fin,"%d%d%d%d",&k,&n,&m,&o);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
toll.cpp:15:16: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         fscanf (fin,"%d%d%d",&x,&y,&z);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
toll.cpp:40:16: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         fscanf (fin,"%d%d",&x,&y);
         ~~~~~~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 8 / 8
• Subtask 4: 31 / 31
• Subtask 5: 44 / 44