제출 #609640

#제출 시각아이디문제언어결과실행 시간메모리
609640fvogel499Arranging Shoes (IOI19_shoes)C++17
컴파일 에러
0 ms0 KiB
#include "grader.cpp" #include "shoes.h" #include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> #define vi vector<int> #define size(x) (int)((x).size()) #define int long long using namespace std; using namespace __gnu_pbds; typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set; const int p2 = 1<<17; struct Segtree { Segtree() { t = new int [p2*2]; for (int i = 0; i < p2*2; i++) t[i] = 0; } void upd(int x, int v) { for (x += p2; x; x /= 2) { t[x] += v; } } int get(int b, int e) { int r = 0; b += p2; e += p2; while (b <= e) { if (b%2 == 1) { r += t[b]; b++; } if (e%2 == 0) { r += t[e]; e--; } b /= 2; e /= 2; } return r; } int* t; }; int count_swaps(vector<signed> bcc) { vi b; for (int i : bcc) b.push_back(i); int n = size(b); map<int, map<int, vi>> per; for (int i = n-1; i >= 0; i--) { int sign = 0; if (b[i] < 0) { sign = 1; } per[abs(b[i])][sign].push_back(i); } bool handled [n]; for (int i = 0; i < n; i++) handled[i] = false; Segtree st = Segtree(); int cost = 0; int before = 0; for (int i = 0; i < n; i++) if (!handled[i]) { int sign = 0; if (b[i] < 0) { sign = 1; } assert(size(per[abs(b[i])][sign]) == size(per[abs(b[i])][!sign])); assert(!per[abs(b[i])][sign].empty() && per[abs(b[i])][sign].back() == i); per[abs(b[i])][sign].pop_back(); int j = per[abs(b[i])][!sign].back(); per[abs(b[i])][!sign].pop_back(); if (b[i] > 0) { cost++; } if (i+1 <= j-1) { int loc = st.get(i+1, j-1); cost += (j-1)-(i+1)+1 - loc; } st.upd(i, 1); // not needed st.upd(j, 1); handled[i] = true; handled[j] = true; } return cost; }

컴파일 시 표준 에러 (stderr) 메시지

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:67:6: warning: unused variable 'before' [-Wunused-variable]
   67 |  int before = 0;
      |      ^~~~~~
/usr/bin/ld: /tmp/ccWCdSH3.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccMsoMn3.o:shoes.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status