제출 #31161

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
31161	2017-08-12 06:31:19	cscandkswon	꿈 (IOI13_dreaming)	C++14	18 / 100	78 ms	10616 KiB

dreaming

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#include "dreaming.h"
#include <bits/stdc++.h>
using namespace std;
const int MAXN=100005;
bool vst[MAXN], chk[MAXN];
vector< pair<int, int> > edge[MAXN];
int dep[MAXN], lng[MAXN], radious;
vector<int> rad;
void dfs1(int nod){
    int i;
    vst[nod]=1, chk[nod]=1;
    for(i=0; i<edge[nod].size(); i++) if(!vst[edge[nod][i].first])
        dfs1(edge[nod][i].first);
    for(i=0; i<edge[nod].size(); i++) if(!vst[edge[nod][i].first])
        dep[nod]=max(dep[nod], dep[edge[nod][i].first]+edge[nod][i].second);
    vst[nod]=0;
}
void dfs2(int nod, int rt){
    int i, dis, mx1=0, mx2=0, idx1;
    vst[nod]=1;
    chk[nod]=1;
    for(i=0; i<edge[nod].size(); i++)if(!vst[edge[nod][i].first]){
        dis=dep[edge[nod][i].first]+edge[nod][i].second;
        if(dis>=mx1)
            mx1=dis, idx1=i;
        else if(dis>mx2)
            mx2=dis;
    }
 
 
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컴파일 시 표준 에러 (stderr) 메시지

dreaming.cpp: In function 'void dfs1(int)':
dreaming.cpp:13:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0; i<edge[nod].size(); i++) if(!vst[edge[nod][i].first])
              ~^~~~~~~~~~~~~~~~~
dreaming.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0; i<edge[nod].size(); i++) if(!vst[edge[nod][i].first])
              ~^~~~~~~~~~~~~~~~~
dreaming.cpp: In function 'void dfs2(int, int)':
dreaming.cpp:24:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0; i<edge[nod].size(); i++)if(!vst[edge[nod][i].first]){
              ~^~~~~~~~~~~~~~~~~
dreaming.cpp:34:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0; i<edge[nod].size(); i++)if(!vst[edge[nod][i].first]){
              ~^~~~~~~~~~~~~~~~~
dreaming.cpp:35:9: warning: 'idx1' may be used uninitialized in this function [-Wmaybe-uninitialized]
         if(i==idx1)
         ^~

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