Submission #263800

#TimeUsernameProblemLanguageResultExecution timeMemory
263800kaageJakarta Skyscrapers (APIO15_skyscraper)C++17
100 / 100
972 ms3452 KiB
#line 2 "/Users/kaage/Desktop/ProgrammingWorkspace/library/other/template.hpp" #define _CRT_SECURE_NO_WARNINGS #pragma target("avx2") #pragma optimize("O3") #pragma optimize("unroll-loops") #include <algorithm> #include <bitset> #include <cassert> #include <cfloat> #include <climits> #include <cmath> #include <complex> #include <ctime> #include <deque> #include <fstream> #include <functional> #include <iomanip> #include <iostream> #include <iterator> #include <list> #include <map> #include <memory> #include <queue> #include <random> #include <set> #include <stack> #include <string> #include <string.h> #include <unordered_map> #include <unordered_set> #include <utility> #include <vector> #define rep(i,n) for(int i=0;i<(n);i++) #define REP(i,n) for(int i=1;i<=(n);i++) #define all(V) V.begin(),V.end() typedef long long lint; typedef unsigned long long ulint; typedef std::pair<int, int> P; typedef std::pair<lint, lint> LP; constexpr int INF = INT_MAX/2; constexpr lint LINF = LLONG_MAX/2; constexpr double eps = DBL_EPSILON; constexpr double PI=3.141592653589793238462643383279; template<class T> class prique :public std::priority_queue<T, std::vector<T>, std::greater<T>> {}; template <class T, class U> inline bool chmax(T& lhs, const U& rhs) { if (lhs < rhs) { lhs = rhs; return 1; } return 0; } template <class T, class U> inline bool chmin(T& lhs, const U& rhs) { if (lhs > rhs) { lhs = rhs; return 1; } return 0; } inline lint gcd(lint a, lint b) { while (b) { lint c = a; a = b; b = c % b; } return a; } inline lint lcm(lint a, lint b) { return a / gcd(a, b) * b; } bool isprime(lint n) { if (n == 1)return false; for (int i = 2; i * i <= n; i++) { if (n % i == 0)return false; } return true; } template<typename T> T mypow(T a, lint b) { T res(1); while(b){ if(b&1)res*=a; a*=a; b>>=1; } return res; } lint modpow(lint a, lint b, lint m) { lint res(1); while(b){ if(b&1){ res*=a;res%=m; } a*=a;a%=m; b>>=1; } return res; } template<typename T> void printArray(std::vector<T>& vec) { rep(i, vec.size()){ std::cout << vec[i]; std::cout<<(i==(int)vec.size()-1?"\n":" "); } } template<typename T> void printArray(T l, T r) { T rprev = std::prev(r); for (T i = l; i != rprev; i++) { std::cout << *i << " "; } std::cout << *rprev << std::endl; } LP extGcd(lint a,lint b) { if(b==0)return {1,0}; LP s=extGcd(b,a%b); std::swap(s.first,s.second); s.second-=a/b*s.first; return s; } LP ChineseRem(const lint& b1,const lint& m1,const lint& b2,const lint& m2) { lint p=extGcd(m1,m2).first; lint tmp=(b2-b1)*p%m2; lint r=(b1+m1*tmp+m1*m2)%(m1*m2); return std::make_pair(r,m1*m2); } /*template<typename F> inline constexpr decltype(auto) lambda_fix(F&& f){ return [f=std::forward<F>(f)](auto&&... args){ return f(f,std::forward<decltype(args)>(args)...); }; }*/ #line 2 "main.cpp" int n,m,b[30010],p[30010]; int dist[30010]; std::vector<int> dvec[30010]; int main(){ scanf("%d%d",&n,&m); rep(i,m){ scanf("%d%d",b+i,p+i); dvec[b[i]].emplace_back(i); } std::fill(dist,dist+n,INF); prique<P> que; for(const int& i:dvec[b[0]])que.push({0,i}); dist[b[0]]=0; while(!que.empty()){ P s=que.top(); que.pop(); if(s.second==1){ std::cout<<s.first<<std::endl; return 0; } if(dist[b[s.second]]<s.first)continue; int now=0; for(int i=b[s.second]-p[s.second];i>=0;i-=p[s.second]){ now++; if(chmin(dist[i],dist[b[s.second]]+now)){ for(const int& j:dvec[i]){ que.push({dist[i],j}); } } } now=0; for(int i=b[s.second]+p[s.second];i<n;i+=p[s.second]){ now++; if(chmin(dist[i],dist[b[s.second]]+now)){ for(const int& j:dvec[i]){ que.push({dist[i],j}); } } } } std::cout<<-1<<std::endl; }

Compilation message (stderr)

/Users/kaage/Desktop/ProgrammingWorkspace/library/other/template.hpp:3: warning: ignoring #pragma target  [-Wunknown-pragmas]
/Users/kaage/Desktop/ProgrammingWorkspace/library/other/template.hpp:4: warning: ignoring #pragma optimize  [-Wunknown-pragmas]
/Users/kaage/Desktop/ProgrammingWorkspace/library/other/template.hpp:5: warning: ignoring #pragma optimize  [-Wunknown-pragmas]
main.cpp: In function 'int main()':
main.cpp:6:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
main.cpp:8:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
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