#include <bits/stdc++.h> #define X first #define Y second using namespace std; typedef long long llint; const int maxn = 2e5+10; const int base = 31337; const int mod = 1e9+7; const int inf = 0x3f3f3f3f; const int logo = 20; const int off = 1 << logo; const int treesiz = off << 1; int n, m; pair<int, int> niz[maxn], ss[maxn]; llint ccw(pair<int, int> a, pair<int, int> b, pair<int, int> c) { return (llint)a.X * (b.Y - c.Y) + (llint)b.X * (c.Y - a.Y) + (llint)c.X * (a.Y - b.Y); } int main() { scanf("%d", &n); for (int i = 0; i < n; i++) { int x, y; scanf("%d%d", &x, &y); niz[i] = {x, y}; } scanf("%d", &m); for (int i = 0; i < m; i++) { int x, y; scanf("%d%d", &x, &y); ss[i] = {x, y}; } llint sol = 0; for (int i = 0; i < n; i++) { llint tren = 0; for (int j = 1; j < n; j++) { int ptr = (i + j) % n; tren += abs(ccw(niz[i], niz[(ptr + n - 1) % n], niz[ptr])); bool flag = true; for (int k = 0; k < m; k++) { if (ccw(niz[i], niz[ptr], ss[k]) <= 0) flag = false; } //if (flag) printf("%d --> %d (%lld)\n", i, ptr, tren); if (flag) sol = max(sol, tren); else break; } } printf("%lld\n", sol); return 0; }

sir.cpp: In function 'int main()':
sir.cpp:24:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
sir.cpp:27:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |   scanf("%d%d", &x, &y);
      |   ~~~~~^~~~~~~~~~~~~~~~
sir.cpp:31:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |  scanf("%d", &m);
      |  ~~~~~^~~~~~~~~~
sir.cpp:34:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |   scanf("%d%d", &x, &y);
      |   ~~~~~^~~~~~~~~~~~~~~~