#include <stdio.h> #include <string.h> #define N 100000 #define M 200000 int max(int a, int b) { return a > b ? a : b; } int main() { static int xx[N], yy[N], cc[N], dd[M]; int n, m, i, a, b, l, r, tmp, ans; scanf("%d%d", &m, &n); for (i = 0; i < n; i++) scanf("%d%d%d", &xx[i], &yy[i], &cc[i]); ans = 0; for (a = 0; a < m; a++) { memset(dd, 0, m * sizeof *dd); for (i = 0; i < n; i++) { l = (xx[i] - a + m) % m, r = (yy[i] - a + m) % m; if (l > r) tmp = l, l = r, r = tmp; dd[l]++, dd[r]--; } for (b = 1; b < m; b++) dd[b] += dd[b - 1]; ans = 0; for (b = 1; b < m; b++) ans = max(ans, dd[b]); } printf("%d\n", (ans + 1) / 2); return 0; }

arranging_tickets.c: In function 'main':
arranging_tickets.c:13:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  scanf("%d%d", &m, &n);
      |  ^~~~~~~~~~~~~~~~~~~~~
arranging_tickets.c:15:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   scanf("%d%d%d", &xx[i], &yy[i], &cc[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~