CodeForces.5A Chat Server's Outgoing Traffic
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Chat Server’s Outgoing Traffic
点我挑战提目
考察点
模拟 字符串
题意分析
给出类似一个群的即时通讯系统,会有用户的加入和离开,还会有用户发消息,每次用户发消息,都会给当前在聊天室内的用户发送该消息。消息中,每个字符(包括空格)都算一个byte,最后问总共发送了多少byte的消息。保证所有数据的合法。
记录当前聊天室内的人数,然后实时更新,并且处理字符串统计每条消息的字节数,用变量sum=+字节数*人数,最后输出即可。
代码总览
/* Title:CodeForces.5A Author:pengwill Date:2016-12-14*/#include <iostream>#include <stdio.h>#include <string.h>using namespace std;char str[105];int main(){ int num = 0,sum = 0; while(gets(str)){ int pos,i; int len = strlen(str); if(str[0] == '+'){ num++; }else if(str[0] == '-'){ num--; }else{ for(i = 0;i<len;i++){ if(str[i] == ':'){ sum+=num*(len-1-i); break; } } } } printf("%d\n",sum); return 0;}
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