제출 #257826

#제출 시각아이디문제언어결과실행 시간메모리
257826doowey007 (CEOI14_007)C++14
27 / 100
343 ms18040 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int, int> pii; #define fi first #define se second #define mp make_pair #define fastIO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0); const int N = (int)2e5 + 10; vector<int> T[N]; int c = 0; int d[4][N]; int n; void bfs(int node){ for(int i = 1; i <= n; i ++ ) d[c][i] = (int)1e9; queue<int> bf; bf.push(node); d[c][node] = 0; while(!bf.empty()){ node = bf.front(); bf.pop(); for(auto x : T[node]){ if(d[c][x] > d[c][node] + 1){ d[c][x] = d[c][node] + 1; bf.push(x); } } } c ++ ; } int main(){ fastIO; int m; cin >> n >> m; int a, b; cin >> a >> b; int n0, n1; cin >> n0 >> n1; int u, v; for(int i = 0 ; i < m ; i ++ ){ cin >> u >> v; T[u].push_back(v); T[v].push_back(u); } bfs(a); bfs(b); bfs(n0); bfs(n1); int d0 = d[1][n0] - d[0][n0]; int d1 = d[1][n1] - d[0][n1]; if(d0 == d1 + 1){ cout << max(-1,d1) << "\n"; } else if(d1 == d0 + 1){ cout << max(-1,d0) << "\n"; } else{ int cc = 0; int dd = 0; for(int i = 1; i <= n; i ++ ){ if(d[0][i] + d[3][i] == d[0][n0] && d[0][i] + d[4][i] == d[0][n1]){ cc = max(cc, d[0][i]); } if(d[1][i] + d[3][i] == d[1][n0] && d[1][i] + d[4][i] == d[1][n1]){ dd = max(dd, d[1][i]); } } cout << max(-1,d0-1) << "\n"; } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

007.cpp: In function 'int main()':
007.cpp:69:62: warning: array subscript is above array bounds [-Warray-bounds]
             if(d[0][i] + d[3][i] == d[0][n0] && d[0][i] + d[4][i] == d[0][n1]){
                                                           ~~~^
007.cpp:72:62: warning: array subscript is above array bounds [-Warray-bounds]
             if(d[1][i] + d[3][i] == d[1][n0] && d[1][i] + d[4][i] == d[1][n1]){
                                                           ~~~^
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