Submission #230659
Source Code Expand
#include <stdio.h> int g[100001][100001] = {0}; int n, q; int max(int a, int b) { return a > b ? a : b; } int count_length(int crt, int pre, int goal) { int max_length = -200000; if (crt == goal) { return 1; } else { for (int i = 1; i <= n; ++i) { if (i != pre && g[crt][i]) { max_length = max(count_length(i, crt, goal), max_length); } } return 1 + max_length; } } int main() { int a, b; // cin >> n; scanf("%d", &n); for(int i = 0; i < n - 1; ++i) { //cin >> a >> b; scanf("%d %d", &a, &b); g[a][b] = 1; g[b][a] = 1; } // cin >> q; scanf("%d", &q); for (int i = 0; i < q; ++i) { // cin >> a >> b; scanf("%d %d", &a, &b); // cout << count_length(b, a, a) << endl; printf("%d\n", count_length(b, a, a)); } }
Submission Info
Submission Time | |
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Task | D - 閉路 |
User | gam0022 |
Language | C (GCC 4.4.7) |
Score | 0 |
Code Size | 854 Byte |
Status | CE |
Compile Error
./Main.c: In function ‘count_length’: ./Main.c:15: error: ‘for’ loop initial declarations are only allowed in C99 mode ./Main.c:15: note: use option -std=c99 or -std=gnu99 to compile your code ./Main.c: In function ‘main’: ./Main.c:29: error: ‘for’ loop initial declarations are only allowed in C99 mode ./Main.c:38: error: redefinition of ‘i’ ./Main.c:29: note: previous definition of ‘i’ was here ./Main.c:38: error: ‘for’ loop initial declarations are only allowed in C99 mode ./Main.c:28: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result ./Main.c:31: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result ./Main.c:37: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result ./Main.c:40: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result