第一题 百分百/* #include<iostream> (5488)#include<vector> #include<algorithm> using namespace std; int main() { int n; cin >> n; vector<vector<int>> input(n, vector<int>(2)); for (int i = 0; i < n; i++) { int x, y; cin >> x >> y; input[i][0] = x; input[i][1] = y; } sort(input.begin(), input.end()); int left = 0, right = n - 1; while (input[left][1] != 1 && left < right) { left++; } while (input[right][1] != 1 && left < right) { right--; } int count = 0; for (int i = left + 1; i <= right && input[i][0] == input[left][0]; i++) { if (input[i][1] == 0) { count++; } } for (int i = right - 1; i > left && input[i][0] == input[right][0]; i--) { if (input[i][1] == 0) { count++; } } int ans = right - left + 1 - count; cout << ans << endl; if (ans <= 0) return 1; return ans; } */