제출 #133423

#제출 시각아이디문제언어결과실행 시간메모리
133423icypiggyToy Train (IOI17_train)C++14
컴파일 에러
0 ms0 KiB
#include <iostream> #include <vector> #include <bitset> #include <queue> #include <string.h> #include <assert.h> using namespace std; const int n_max = 6000; vector<int> backward[n_max]; // edges run in the reverse direction! bool whowin[n_max][n_max]; // position, then state. true = unknown, false = b wins int deg[n_max][n_max]; // this is the out degree void init(vector<int> &u, vector<int> &v) { memset(deg, 0, sizeof(deg)); for(int i=0; i<u.size(); i++) { backward[v[i]].push_back(u[i]); for(int j=0; j<n_max; j++) { deg[u[i]][j]++; } } } vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v) { init(u,v); int n = a.size(); queue<pair<int,int>> bfs; for(int i=0; i<n; i++) { for(int j=0; j<=n; j++) { whowin[i][j] = true; } if(!r[i]) { whowin[i][0] = false; bfs.push(make_pair(i,0)); } } while(!bfs.empty()) { pair<int,int> next = bfs.front(); bfs.pop(); if(r[next.first] && next.second==n) { for(int i: backward[next.first]) { if(a[i]) { for(int j=0; j<=n; j++) { deg[i][j]--; if(deg[i][j]==0 && whowin[i][j]) { whowin[i][j] = false; bfs.push(make_pair(i,j)); } } } else { for(int j=0; j<=n; j++) { if(whowin[i][j]) { whowin[i][j] = false; bfs.push(make_pair(i,j)); } } } } } else if (r[next.first]==0) { for(int i: backward[next.first]) { int j = min(n, next.second + 1); if(a[i] && n!=next.second) { deg[i][j]--; if(deg[i][j]==0 && whowin[i][j]) { whowin[i][j] = false; bfs.push(make_pair(i,j)); } } else { if(whowin[i][j]) { whowin[i][j] = false; bfs.push(make_pair(i,j)); } } } } } vector<int> ans(n,0); for(int i=0; i<n; i++) { ans[i] = whowin[i][n]; } return ans; } int main() { vector<int> a = {0,1,1,1,0}; vector<int> r = {0,1,1,1,1}; vector<int> u = {0,1,2,3,4}; vector<int> v = {1,2,3,4,4}; vector<int> x = who_wins(a,r,u,v); for(int i: x) { cout << i; } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

train.cpp: In function 'void init(std::vector<int>&, std::vector<int>&)':
train.cpp:16:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<u.size(); i++) {
                  ~^~~~~~~~~
/tmp/ccEtmUBJ.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccarUIsd.o:train.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status