제출 #255305

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
255305	2020-07-31 17:15:03	model_code	Aesthetic (NOI20_aesthetic)	C++17	100 / 100	852 ms	34680 KiB

Aesthetic

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#include <bits/stdc++.h>
using namespace std;
long long r[2][300000];
bool vt[300000], f[300000];
int A[300000][4], p[300000], q[300000], d[300000], id[300000];
vector<pair<pair<int, int>, int> > adj[300000];
priority_queue<pair<pair<long long, int>, pair<int, int> > > pq;
int frt(int i) {return i == id[i] ? i : id[i] = frt(id[i]);}
void it(int i, int t, int o, int l, long long v) {
    if (vt[i]) return;
    vt[i] = 1;
    if (!t) {p[i] = o; q[i] = l; d[i] = d[o] + !!i;}
    r[t][i] = v;
    for (int j = 0; j < adj[i].size(); ++j) if (!vt[adj[i][j].first.first]) pq.emplace(make_pair(-v - adj[i][j].first.second, adj[i][j].first.first), make_pair(i, adj[i][j].second));
}
int main() {
    //freopen("in.txt", "r", stdin);
    int N, M, a, b, x, i, j;
    long long l, h, c;
    bool e;
    scanf("%d %d", &N, &M);
    for (i = 0; i < M; ++i) {for (j = 0; j < 3; ++j) scanf("%d", &A[i][j]); adj[--A[i][0]].emplace_back(make_pair(--A[i][1], A[i][2]), i); adj[A[i][1]].emplace_back(make_pair(A[i][0], A[i][2]), i);}
    for (i = M - 2; i > -1; --i) A[i][3] = max(A[i + 1][2], A[i + 1][3]);
    it(0, 0, 0, -1, 0);
    while (!pq.empty()) x = pq.top().first.second, c = -pq.top().first.first, a = pq.top().second.first, b = pq.top().second.second, pq.pop(), it(x, 0, a, b, c);
    memset(vt, 0, sizeof(vt));
 
 
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컴파일 시 표준 에러 (stderr) 메시지

Aesthetic.cpp: In function 'void it(int, int, int, int, long long int)':
Aesthetic.cpp:17:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int j = 0; j < adj[i].size(); ++j) if (!vt[adj[i][j].first.first]) pq.emplace(make_pair(-v - adj[i][j].first.second, adj[i][j].first.first), make_pair(i, adj[i][j].second));
                     ~~^~~~~~~~~~~~~~~
Aesthetic.cpp: In function 'int main()':
Aesthetic.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &N, &M);
     ~~~~~^~~~~~~~~~~~~~~~~
Aesthetic.cpp:26:59: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (i = 0; i < M; ++i) {for (j = 0; j < 3; ++j) scanf("%d", &A[i][j]); adj[--A[i][0]].emplace_back(make_pair(--A[i][1], A[i][2]), i); adj[A[i][1]].emplace_back(make_pair(A[i][0], A[i][2]), i);}
                                                      ~~~~~^~~~~~~~~~~~~~~~

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