Pascal 解法, 执行用时: 2ms, 内存消耗: 256KB, 提交时间: 2022-05-12

program test;
var
    inputstr:string;
    i:integer;
begin
    Readln(inputstr);
    for i := length(inputstr) downto 1 do begin
        if inputstr[i] = ' ' then begin
           writeln(length(inputstr)-i);
           break;
        end;
    end; 
    if i = 1 then
        writeln(length(inputstr));
end.

C 解法, 执行用时: 2ms, 内存消耗: 280KB, 提交时间: 2022-05-16

/*#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string.h>
int main()
{
    char str[5000] = {0};
    //scanf("%s", str);
    gets(str);
    int i = 0;
    int len=0;
    len=strlen(str);
    while((len>=1)&&(str[len-1]!=' '))
    {
        i++;
        len--;
    }
    printf("%d",i);
}*/
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<math.h>
int main()
{
	char str[5000] = { 0 };
	gets(str);
	int i = 0;
	int len = 0;
	len = strlen(str);
	char* b=strrchr(str, ' ');
    if(b!=NULL)
	   printf("%d", len-(b-str+1));
    else
        printf("%d",len);
}