659277 386183
1 2
1 3
1 17
1 34
1 311
1 347
1 539
1 1138
1 1472
1 3361
1 7475
1 10600
1 24431
1 3881
<18857310 bytes omitted>用户输出
626296
系统信息
Exited with return code 0| 编号 | 题目 | 状态 | 分数 | 总时间 | 内存 | 代码 / 答案文件 | 提交者 | 提交时间 |
|---|---|---|---|---|---|---|---|---|
| #55410 | #1298. 寻找终点 | Accepted | 100 | 761 ms | 17516 K | C++ 11 (NOI) / 1.0 K | jiaangk | 2021-07-09 18:00:38 |
#include <bits/stdc++.h>
#define LL long long
#define ULL unsigned long long
#define pb push_back
#define st first
#define nd second
#define INF 0x3f3f3f3f
#define LINF 0x3f3f3f3f3f3f3f3f
template <class T>
T read(T &a) {
a = 0;
char x = getchar();
bool f = 0;
for (; x < '0' || x > '9'; x = getchar()) f |= x == '-';
for (; x >= '0' && x <= '9'; x = getchar()) a = (a << 3) + (a << 1) + x - '0';
if (f)
a = -a;
return a;
}
using namespace std;
const int N = 1e6 + 5;
int nxt[N << 1], f[N], v[N << 1];
int s, n, cnt;
void add(int a, int b) {
nxt[++cnt] = f[a];
f[a] = cnt;
v[cnt] = b;
}
int dfs(int cur, int pre) {
int minn = INF;
for (int i = f[cur]; i; i = nxt[i]) {
int to = v[i];
if (to == pre)
continue;
minn = min(minn, to);
}
if (minn == INF)
return cur;
return dfs(minn, cur);
}
int main() {
read(n), read(s);
for (int i = 1; i < n; ++i) {
int a, b;
read(a), read(b);
add(a, b);
add(b, a);
}
printf("%d\n", dfs(s, 0));
return 0;
}
659277 386183
1 2
1 3
1 17
1 34
1 311
1 347
1 539
1 1138
1 1472
1 3361
1 7475
1 10600
1 24431
1 3881
<18857310 bytes omitted>用户输出
626296
系统信息
Exited with return code 0256069 235113
1 2
1 3
1 4
1 6
1 10
1 11
1 13
1 34
1 46
1 82
1 115
1 534
1 789
1 1007
2 9
2 456
2 836
<6972062 bytes omitted>用户输出
186089
系统信息
Exited with return code 0577392 319668
1 2
1 3
1 7
1 55
1 1360
1 256588
1 323239
1 460008
2 4
2 16
2 24
2 225
2 10553
2 18482
<16431146 bytes omitted>用户输出
37589
系统信息
Exited with return code 0881921 4297
1 2
1 5
1 101
1 992
1 2378
1 23833
1 57369
1 62249
1 164836
1 342354
1 634202
2 3
2 4
2
<25472882 bytes omitted>用户输出
436278
系统信息
Exited with return code 0690116 401010
1 2
1 3
1 4
1 10
1 14
1 46
1 87
1 159
1 447
1 511
1 523
1 699
1 2025
1 9648
1 12980
1
<19772222 bytes omitted>用户输出
656490
系统信息
Exited with return code 0179327 251
1 2
1 3
1 5
1 17
1 70
1 90
1 112
1 1553
1 1775
1 1928
1 2180
1 6766
1 7623
1 67044
1 1279
<4749045 bytes omitted>用户输出
103582
系统信息
Exited with return code 071567 57797
1 2
1 3
1 4
1 24
1 85
1 96
1 106
1 209
1 548
1 11245
1 37632
1 64950
1 67341
2 5
2 6
2 1
<1766792 bytes omitted>用户输出
5621
系统信息
Exited with return code 0479057 240031
1 2
1 4
1 14
1 29
1 170
1 326
1 3811
1 6465
1 7184
1 27831
1 36571
1 63687
1 135286
1
<13521216 bytes omitted>用户输出
313414
系统信息
Exited with return code 0100481 81388
1 2
1 3
1 6
1 13
1 15
1 29
1 362
1 462
1 1030
1 1454
1 2979
1 5473
1 7570
1 96038
2 4
2
<2512053 bytes omitted>用户输出
26359
系统信息
Exited with return code 0438544 368826
1 2
1 21
1 75
1 413
1 993
1 1922
1 31917
1 48275
1 160089
2 3
2 5
2 6
2 19
2 23
2 115
<12326052 bytes omitted>用户输出
220367
系统信息
Exited with return code 0