제출 #522821

#제출 시각아이디문제언어결과실행 시간메모리
522821Deepesson말 (IOI15_horses)C++17
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> //#include "horses.h" #define MAX 105000 typedef long long ll; typedef std::pair<ll,bool> plb; long long MOD = 1e9+7; plb mul(plb a,plb b){ plb c; c.first=a.first*b.first; c.second=std::max(a.second,b.second); if(c.first>=MOD){ c.second=true; c.first%=MOD; } return c; } typedef std::pair<plb,int> ppi; int n; ppi mul(ppi a,ppi b){ plb c=mul(a.first,b.first); ppi d; d.first=c; d.second=a.second; return d; } ppi tab[MAX*4]; void update(int t,int j,int la=0,int ra=0,int pos=1){ int m = (la+ra)/2; if(ra<t||la>t)return; if(la==ra){ tab[pos].second=t; tab[pos].first.first=j; tab[pos].first.second=false; return; } update(t,j,la,m,pos*2); update(t,j,m+1,ra,(pos*2)+1); tab[pos]=mul(tab[pos*2],tab[(pos*2)+1]); } ppi omega; ppi nrmquery(int l,int r,int la=0,int ra=n-1,int pos=1){ if(l>ra||r<la)return omega; if(l>=la&&r<=ra){ return tab[pos]; } int m = (la+ra)/2; return mul(nrmquery(l,r,la,m,pos*2),nrmquery(l,r,m+1,ra,(pos*2)+1)); } ppi query(int la=0,int ra=n-1,int pos=1){ int m = (la+ra)/2; if(!tab[pos].first.second){ return tab[pos]; }else return query(m+1,ra,(pos*2)+1); } typedef std::array<std::array<long long,2>,2> matriz; matriz mul(matriz a,matriz b){ matriz c={}; for(int i=0;i!=2;++i){ for(int j=0;j!=2;++j){ for(int k=0;k!=2;++k){ ///Nunca vai ter q usar o MOD, estou fazendo malandragem para isso c[i][j]=std::max(c[i][j],a[i][k]*b[k][j]); } } } return c; } matriz mattab[MAX*4]; matriz neutro; void matupdate(int t,matriz k,int la=0,int ra=n-1,int pos=1){ if(ra<t||la>t)return; if(la==ra){ mattab[pos]=k; return; } int m = (la+ra)/2; matupdate(t,k,la,m,pos*2); matupdate(t,k,m+1,ra,(pos*2)+1); mattab[pos]=mul(mattab[pos*2],mattab[(pos*2)+1]); } matriz matquery(int l,int r,int la=0,int ra=n-1,int pos=1){ if(l>ra||r<la)return neutro; if(l>=la&&r<=ra){ return mattab[pos]; } int m = (la+ra)/2; return mul(matquery(l,r,la,m,pos*2),matquery(l,r,m+1,ra,(pos*2)+1)); } matriz gerarmat(int X,int Y){ matriz a={},b={}; a[0][0]=X; a[1][1]=1; b[0][0]=1; b[1][1]=1; b[0][1]=Y; return mul(a,b); } int get(void){ ppi u = query(); int l = u.second; if(tab[0].second)++l; long long base=1; if(l){ base=nrmquery(0,l-1).first.first; } matriz a={}; a[0][0]=base; a=mul(a,matquery(l,n-1)); assert(a[0][1]<MOD); return a[0][1]%MOD; } int x[MAX],y[MAX]; int init(int N, int X[], int Y[]) { omega.first.first=1; neutro[0][0]=neutro[1][1]=1; n=N; for(int i=0;i!=N;++i){ update(i,X[i]); } for(int i=0;i!=N;++i){ x[i]=X[i],y[i]=Y[i]; matupdate(i,gerarmat(X[i],Y[i])); } return get(); } int updateX(int pos, int val) { x[pos]=val; update(pos,val); matupdate(pos,gerarmat(x[pos],y[pos])); return get(); } int updateY(int pos, int val) { y[pos]=val; matupdate(pos,gerarmat(x[pos],y[pos])); return get(); } int main(){ int a[]={2,1,3},b[]={3,2,1}; std::cout<<init(3,a,b)<<"\n"; std::cout<<updateY(1,4)<<"\n"; }

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In function 'int get()':
horses.cpp:114:19: warning: conversion from 'std::array<long long int, 2>::value_type' {aka 'long long int'} to 'int' may change value [-Wconversion]
  114 |     return a[0][1]%MOD;
/usr/bin/ld: /tmp/ccc0ibAf.o: in function `main':
grader.c:(.text.startup+0x0): multiple definition of `main'; /tmp/ccwqAvVe.o:horses.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status