제출 #28625

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
28625		슈퍼스타 tlwpdus (#68)	Alternative Mart (FXCUP2_mart)	C++11	0 / 1	4843 ms	144360 KiB

mart

#include <bits/stdc++.h>

using namespace std;

typedef pair<int,int> pii;

int n, m, k, q;
vector<int> mart;
vector<pii> lis[50010];

map<pii,int> fin;
pii rin[2200000];
int p;
int dis[2200000];
int cnt[50010];
vector<int> what[50010];
vector<pii> gd[50010];

int msv = 12;

void dijk() {
	int i, j;
	priority_queue<pii> pq;

	for (i=0;i<2200000;i++) dis[i] = 987654321;
	for (i=0;i<k;i++) {
		fin[pii(mart[i],mart[i])] = p;
		rin[p] = pii(mart[i],mart[i]);
		dis[p] = 0;
		pq.push(pii(0,p));
		p++;
	}

	while(!pq.empty()) {
		pii tmp = pq.top(); pq.pop();
		if (dis[tmp.second]!=-tmp.first||cnt[rin[tmp.second].first]>=msv) continue;
		int here = rin[tmp.second].first, mar = rin[tmp.second].second, d = -tmp.first;
		cnt[here]++;
		for (auto &tmp : lis[here]) {
			int there = tmp.second, w = tmp.first;
			if (cnt[there]>=msv) continue;
			auto it = fin.find(pii(there,mar));
			int curp;
			if (it==fin.end()) {
				curp = p;
				fin[pii(there,mar)] = p;
				rin[p] = pii(there,mar);
				p++;
			}
			else curp = it->second;
			if (dis[curp]<=d+w) continue;
			dis[curp] = d+w;
			pq.push(pii(-d-w,curp));
		}
	}

	for (i=0;i<p;i++) {
		what[rin[i].first].push_back(rin[i].second);
	}

	for (i=0;i<n;i++) {
		sort(what[i].begin(),what[i].end());
		what[i].erase(unique(what[i].begin(),what[i].end()),what[i].end());
		for (int j=0;j<what[i].size();j++) {
			gd[i].push_back(pii(dis[fin[pii(i,what[i][j])]],what[i][j]));
		}
		sort(gd[i].begin(),gd[i].end());
	}
}

vector<int> que;
bool qchk[50010];
int main() {
	int i;

	scanf("%d%d%d%d",&n,&m,&k,&q);
	for (i=0;i<k;i++) {
		int a;
		scanf("%d",&a); --a;
		mart.push_back(a);
	}
	for (i=0;i<m;i++) {
		int a, b, c;
		scanf("%d%d%d",&a,&b,&c); --a; --b;
		lis[a].push_back(pii(c,b));
		lis[b].push_back(pii(c,a));
	}
	dijk();
	for (i=0;i<q;i++) {
		int s, x;
		que.reserve(12);
		scanf("%d%d",&s,&x); --s;
		for (int j=0;j<x;j++) {
			int a;
			scanf("%d",&a); --a;
			que.push_back(a);
			qchk[a] = 1;
		}
		for (int j=0;j<gd[s].size();j++) {
			if (!qchk[gd[s][j].second]) {
				printf("%d %d\n",gd[s][j].second+1,gd[s][j].first);
				break;
			}
		}
		for (int j=0;j<x;j++) {
			qchk[que[j]] = 0;
		}
		que.clear();
	}

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

mart.cpp: In function 'void dijk()':
mart.cpp:64:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j=0;j<what[i].size();j++) {
                 ^
mart.cpp:22:9: warning: unused variable 'j' [-Wunused-variable]
  int i, j;
         ^
mart.cpp: In function 'int main()':
mart.cpp:99:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j=0;j<gd[s].size();j++) {
                 ^
mart.cpp:76:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d",&n,&m,&k,&q);
                               ^
mart.cpp:79:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a); --a;
                 ^
mart.cpp:84:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&a,&b,&c); --a; --b;
                           ^
mart.cpp:92:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&s,&x); --s;
                      ^
mart.cpp:95:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&a); --a;
                  ^

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