oj.uz

Submission #66066

# Submission time Handle Problem Language Result Execution time Memory
66066 2018-08-09T13:24:58 Z ikura355 007 (CEOI14_007) C++14
66.6667 / 100
 505 ms 18684 KB 
#include<bits/stdc++.h>
using namespace std;

const int maxn = 2e5 + 5;
const int inf = 1e9;

int n,m,a,b,s1,s2;
vector<int> way[maxn];
int d[2][maxn];
int q[maxn];
int p[maxn], wow[maxn];

int sssp(int k, int u) {
    int l = 1, r = 0;
	for(int i=1;i<=n;i++) d[k][i] = inf;
	d[k][u] = 0; q[++r] = u;
	while(l<=r) {
		int u = q[l++];
		for(auto v : way[u]) {
			if(d[k][v] > d[k][u] + 1) {
				d[k][v] = d[k][u] + 1; q[++r] = v;
			}
		}
	}
}

bool cmp(int x, int y) {
    if(d[0][x]!=d[0][y]) return d[0][x] < d[0][y];
    if(d[1][x]!=d[1][y]) return d[1][x] < d[1][y];
  	return x<y;
}

int main() {
	scanf("%d%d",&n,&m);
	scanf("%d%d%d%d",&a,&b,&s1,&s2);
	for(int i=1;i<=m;i++) {
		int u,v; scanf("%d%d",&u,&v);
		way[u].push_back(v); way[v].push_back(u);
	}
	sssp(0,s1); sssp(1,s2);
	if(d[0][a]>d[0][b] || d[1][a]>d[1][b]) return !printf("-1");
    int res = min(d[0][b]-d[0][a], d[1][b]-d[1][a]);
//    printf("res = %d\n",res);
    if(d[0][b]-d[0][a] == d[1][b]-d[1][a]) {
        for(int i=1;i<=n;i++) p[i] = i;
        sort(&p[1],&p[n],cmp);
        for(int i=1;i<=n;i++) {
            int u = p[i];
            for(auto v : way[u]) {
                if(d[0][v]==d[0][u]+1 && d[1][v]==d[1][u]+1) wow[v] = max(wow[v], wow[u]+1);
            }
//            printf("wow %d = %d\n",u,wow[u]);
        }
        if(wow[a]+res<wow[b]) res = res-1;
    }
    printf("%d",res);
}

Compilation message

007.cpp: In function 'int sssp(int, int)':
007.cpp:25:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
007.cpp: In function 'int main()':
007.cpp:34:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~
007.cpp:35:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d",&a,&b,&s1,&s2);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
007.cpp:37:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int u,v; scanf("%d%d",&u,&v);
            ~~~~~^~~~~~~~~~~~~~

Subtask #1
20.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 4984 KB Output is correct
2 Correct 9 ms 5120 KB Output is correct
3 Correct 8 ms 5300 KB Output is correct
4 Incorrect 8 ms 5300 KB Output isn't correct
5 Correct 8 ms 5300 KB Output is correct
6 Correct 8 ms 5300 KB Output is correct
7 Correct 9 ms 5352 KB Output is correct
8 Correct 7 ms 5376 KB Output is correct
9 Correct 6 ms 5376 KB Output is correct
10 Correct 8 ms 5376 KB Output is correct
11 Correct 7 ms 5376 KB Output is correct
12 Correct 8 ms 5376 KB Output is correct
13 Correct 8 ms 5376 KB Output is correct
14 Correct 8 ms 5376 KB Output is correct
15 Correct 7 ms 5376 KB Output is correct
16 Correct 10 ms 5376 KB Output is correct
17 Correct 9 ms 5376 KB Output is correct
18 Correct 8 ms 5376 KB Output is correct
19 Correct 9 ms 5484 KB Output is correct
20 Correct 9 ms 5484 KB Output is correct
21 Correct 8 ms 5484 KB Output is correct
22 Correct 10 ms 5484 KB Output is correct
23 Correct 11 ms 5484 KB Output is correct
24 Correct 9 ms 5484 KB Output is correct

Subtask #2
46.666667 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 7400 KB Output is correct
2 Incorrect 72 ms 8300 KB Output isn't correct
3 Correct 54 ms 8300 KB Output is correct
4 Correct 101 ms 8428 KB Output is correct
5 Correct 45 ms 8428 KB Output is correct
6 Correct 54 ms 8428 KB Output is correct
7 Correct 63 ms 8428 KB Output is correct
8 Correct 67 ms 8428 KB Output is correct
9 Correct 71 ms 8428 KB Output is correct
10 Correct 216 ms 12668 KB Output is correct
11 Correct 82 ms 12668 KB Output is correct
12 Correct 135 ms 12668 KB Output is correct
13 Correct 109 ms 12668 KB Output is correct
14 Correct 82 ms 12668 KB Output is correct
15 Correct 130 ms 12668 KB Output is correct
16 Correct 109 ms 12668 KB Output is correct
17 Correct 110 ms 12668 KB Output is correct
18 Correct 134 ms 12668 KB Output is correct
19 Correct 183 ms 12668 KB Output is correct
20 Correct 326 ms 14972 KB Output is correct
21 Correct 174 ms 14972 KB Output is correct
22 Correct 171 ms 14972 KB Output is correct
23 Correct 163 ms 14972 KB Output is correct
24 Correct 181 ms 14972 KB Output is correct
25 Correct 193 ms 14972 KB Output is correct
26 Correct 162 ms 14972 KB Output is correct
27 Correct 167 ms 14972 KB Output is correct
28 Correct 200 ms 14972 KB Output is correct
29 Correct 279 ms 14972 KB Output is correct
30 Correct 370 ms 15956 KB Output is correct
31 Correct 247 ms 15956 KB Output is correct
32 Correct 199 ms 15956 KB Output is correct
33 Correct 182 ms 15956 KB Output is correct
34 Correct 228 ms 15956 KB Output is correct
35 Correct 203 ms 15956 KB Output is correct
36 Correct 215 ms 15956 KB Output is correct
37 Correct 171 ms 15956 KB Output is correct
38 Correct 226 ms 15956 KB Output is correct
39 Correct 271 ms 15956 KB Output is correct
40 Correct 332 ms 16372 KB Output is correct
41 Correct 505 ms 18684 KB Output is correct