제출 #989011

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
989011		crafticat	말 (IOI15_horses)	C++17	17 / 100	1579 ms	8284 KiB

horses

#include <bits/stdc++.h>

using namespace std;
constexpr int MOD = 1e9 + 7;
using ll = long long;

vector<int> x, y;
int n;

int solve() {
    ll mult = 1;
    ll ans = 0;

    for (int i = 0; i < n; ++i) {
        mult *= x[i];

        if (mult >= MOD) {
            mult %= MOD;
        }
        ans = max(ans, (mult * y[i]));
    }
    return ans % MOD;
}

int init(int N, int X[], int Y[]) {
    n = N;
    x.resize(N);
    y.resize(N);
    for (int i = 0; i < N; ++i) {
        x[i] = X[i];
        y[i] = Y[i];
    }

    return solve();
}
int updateX(int pos, int val) {
    x[pos] = val;
    return solve();
}
int updateY(int pos, int val) {
    y[pos] = val;
    return solve();
}

#if DEBUG
static char _buffer[1024];
static int _currentChar = 0;
static int _charsNumber = 0;
static FILE *_inputFile, *_outputFile;

static inline int _read() {
    if (_charsNumber < 0) {
        exit(1);
    }
    if (!_charsNumber || _currentChar == _charsNumber) {
        _charsNumber = (int)fread(_buffer, sizeof(_buffer[0]), sizeof(_buffer), _inputFile);
        _currentChar = 0;
    }
    if (_charsNumber <= 0) {
        return -1;
    }
    return _buffer[_currentChar++];
}

static inline int _readInt() {
    int c, x, s;
    c = _read();
    while (c <= 32) c = _read();
    x = 0;
    s = 1;
    if (c == '-') {
        s = -1;
        c = _read();
    }
    while (c > 32) {
        x *= 10;
        x += c - '0';
        c = _read();
    }
    if (s < 0) x = -x;
    return x;
}


int main() {
	_inputFile = fopen("horses.in", "rb");
	_outputFile = fopen("horses.out", "w");

	int N; N = _readInt();

	int *X = (int*)malloc(sizeof(int)*(unsigned int)N);
	int *Y = (int*)malloc(sizeof(int)*(unsigned int)N);

	for (int i = 0; i < N; i++) {
		X[i] = _readInt();
	}

	for (int i = 0; i < N; i++) {
		Y[i] = _readInt();
	}

	cout << init(N,X,Y) << endl;

	int M; M = _readInt();

	for (int i = 0; i < M; i++) {
		int type; type = _readInt();
		int pos; pos = _readInt();
		int val; val = _readInt();

		if (type == 1) {
			cout << updateX(pos,val) << endl;
		} else if (type == 2) {
            cout << updateY(pos,val) << endl;
		}
	}

	return 0;
}
#endif

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In function 'int solve()':
horses.cpp:22:16: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   22 |     return ans % MOD;
      |            ~~~~^~~~~

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