제출 #684277

#제출 시각아이디문제언어결과실행 시간메모리
684277JuanArranging Shoes (IOI19_shoes)C++17
50 / 100
48 ms28620 KiB
// #include<bits/stdc++.h> // using namespace std; // #define pii pair<int, int> // #define ff first // #define ss second // const int maxn = 1e5 + 5; // vector<int> calc[2*maxn]; // int pos[maxn], bit[maxn], v[maxn]; // void upd(int id){ // for(; id < maxn; id+=id&-id) bit[id]++; // } // void updn(int id){ // for(; id < maxn; id+=id&-id) bit[id]--; // } // int soma(int id){ // int rt = 0; // for(; id>0; id-=id&-id) rt+=bit[id]; // return rt; // } // int main(){ // int n; cin >> n; // for(int i = 1; i <= n; i++){cin >> v[i]; upd(i);} // for(int i = 1; i <= n; i++){ // calc[abs(v[i])+maxn*(v[i]>0)].push_back(i); // } // memset(pos, -1, sizeof pos); // for(int i = 1; i <= n; i++){ // for(int j = 0; j < calc[i].size(); j++){ // int mn = min(calc[i][j], calc[i+maxn][j]); // int mx = max(calc[i][j], calc[i+maxn][j]); // pos[mn] = mx; // } // } // int ans = 0; // for(int i = 1; i <= n; i++){ // if(pos[i]!=-1){ // ans += soma(pos[i]-1) - soma(i) + (v[i]>0); // updn(pos[i]), upd(i); // } // } // cout << ans << '\n'; // } #include<bits/stdc++.h> using namespace std; #define pii pair<int, int> #define ff first #define ss second const int maxn = 1e5 + 5; vector<int> calc[2*maxn]; int pos[maxn], bit[maxn]; void upd(int id){ for(; id < maxn; id+=id&-id) bit[id]++; } void updn(int id){ for(; id < maxn; id+=id&-id) bit[id]--; } int soma(int id){ int rt = 0; for(; id>0; id-=id&-id) rt+=bit[id]; return rt; } int64_t count_swaps(vector<int> v){ int n = v.size(); for(int i = 1; i <= n; i++) upd(i); for(int i = 1; i <= n; i++){ calc[abs(v[i-1])+maxn*(v[i-1]>0)].push_back(i); } memset(pos, -1, sizeof pos); for(int i = 1; i <= n; i++){ for(int j = 0; j < calc[i].size(); j++){ int mn = min(calc[i][j], calc[i+maxn][j]); int mx = max(calc[i][j], calc[i+maxn][j]); pos[mn] = mx; } } int64_t ans = 0; for(int i = 1; i <= n; i++){ if(pos[i]!=-1){ ans += soma(pos[i]-1) - soma(i) + (v[i-1]>0); updn(pos[i]), upd(i); } } return ans; }

컴파일 시 표준 에러 (stderr) 메시지

shoes.cpp: In function 'int64_t count_swaps(std::vector<int>)':
shoes.cpp:81:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |   for(int j = 0; j < calc[i].size(); j++){
      |                  ~~^~~~~~~~~~~~~~~~
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...