#include <vector>
#include <iostream>
int main() {
std::vector<std::vector<int>> letters(62, std::vector<int>(56, 0));
letters[0][0]=1;
std::cout<<letters[0][0];
}
This compiles and outputs 1 as wanted, so your problem seems to be somewhere else.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…