Submission #291408

#	Time	Username	Problem	Language	Result	Execution time	Memory
291408		MarcoMeijer	Horses (IOI15_horses)	C++14	17 / 100	47 ms	13948 KiB

horses

#include <bits/stdc++.h>

using namespace std;

#include "horses.h"

//macros
typedef long long ll;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define INF 1e9
#define pb push_back
#define fi first
#define se second
#define sz size()

const int MX = 5e5+10;
const int MOD = 1e9+7;
ll n, x[MX], y[MX];
ll seg[MX*2];

void buildSeg() {
    RE(i,n) seg[i+n] = x[i];
    RE(i,n) seg[i] = (seg[i*2]*seg[i*2+1])%MOD;
}
void setSeg(int i, ll v) {
    for(seg[i+=n]=v; i>1; i/=2) seg[i/2] = (seg[i]*seg[i^1])%MOD;
}
ll getSeg(int i, int j) {
    ll res = 1;
    for(i+=n, j+=n; i<j; i/=2, j/=2) {
        if(i&1) res = (res*seg[i++])%MOD;
        if(j&1) res = (res*seg[--j])%MOD;
    }
    return res;
}

int getAns() {
    ll bst = 1;
    int i=n-1;
    while(i >= 0) {
        bst = max(bst, y[i]);
        bst *= x[i];
        i--;
        if(bst >= INF) {
            break;
        }
    }
    bst %= MOD;
    bst = (bst*getSeg(0,i+1))%MOD;
    return bst;
}

int init(int N, int X[], int Y[]) {
    n=N;
    RE(i,n) x[i]=X[i];
    RE(i,n) y[i]=Y[i];
	return getAns();
}

int updateX(int pos, int val) {	
    x[pos] = val;
    setSeg(pos, val);
	return getAns();
}

int updateY(int pos, int val) {
    y[pos] = val;
	return getAns();
}

Compilation message (stderr)

horses.cpp: In function 'void setSeg(int, ll)':
horses.cpp:38:14: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   38 |     for(seg[i+=n]=v; i>1; i/=2) seg[i/2] = (seg[i]*seg[i^1])%MOD;
      |             ~^~~
horses.cpp: In function 'll getSeg(int, int)':
horses.cpp:42:10: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   42 |     for(i+=n, j+=n; i<j; i/=2, j/=2) {
      |         ~^~~
horses.cpp:42:16: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   42 |     for(i+=n, j+=n; i<j; i/=2, j/=2) {
      |               ~^~~
horses.cpp: In function 'int getAns()':
horses.cpp:51:12: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   51 |     int i=n-1;
      |           ~^~
horses.cpp:56:12: warning: conversion from 'll' {aka 'long long int'} to 'double' may change value [-Wconversion]
   56 |         if(bst >= INF) {
      |            ^~~
horses.cpp:62:12: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   62 |     return bst;
      |            ^~~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 23
• Subtask 5: 0 / 23